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|Exam Name||:||Querying Microsoft SQL Server 2012/2014|
|Questions and Answers||:||297 Q & A|
|Updated On||:||February 21, 2019|
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newsMicrosoft Readies Azure SQL, SQL Server 2019 Preview advancements
Microsoft precise a raft of advancements coming to its database items at this week's pass Summit, together with migration guide to Azure SQL Database, Apache Kafka guide on Azure adventure Hubs, Azure SQL records Warehouse advancements and yet another preview of the coming SQL Server 2019 product.
SQL Server 2019 CTP 2.1SQL Server 2019 is still on the preview stage, even though it's now reached community know-how Preview (CTP) 2.1, based on Rohan Kumar, Microsoft's corporate vp for Azure facts, in the announcement. Microsoft is touting built-in aid for Apache Spark and the Hadoop allotted File equipment in the coming SQL Server 2019 product.
The latest preview of SQL Server 2019, specifically CTP 2.1, provides help for deploying Python- and R-primarily based purposes on clusters. It brings the potential to vicinity a "buffer pool in persistent memory," which is idea to speed up I/O operations. there may be additionally enhanced diagnostics for troubleshooting long-operating queries that have gotten blocked, among different perks.
a further function that may be coming to SQL Server 2019 in a future preview free up can be a new "Accelerated information recuperation" function, Kumar stated.
Hybrid and Migration SupportKumar pointed out that Microsoft has been "architecting for hybrid" to help clients that plan to run "records workloads in on-premises [servers] and in the cloud." To that conclusion, Microsoft has been making it less complicated for SQL Server users emigrate towards Azure SQL services.
Kumar pointed to the Azure SQL Database Managed instance provider as a at present available answer for some groups working SQL Server 2008 and SQL Server 2008 R2, which both will fall out of "prolonged assist" on July 9, 2019, fitting unsupported items. Azure SQL Database Managed example, which is a provider managed by Microsoft, is described as being an area in Microsoft's datacenters it is "committed in your needs and not shared with another shoppers," in response to this Microsoft weblog publish. Azure SQL Database Managed illustration makes use of the SQL Server 2017 business version, which has "backward compatibility with SQL Server 2008 and newer" server items, Microsoft indicated.
Microsoft is also planning to add a brand new company vital tier to the Azure SQL Database Managed illustration service for organizations running "mission-vital business apps with high I/O requirements." This company important tier is expected to attain "frequent availability" (industrial unlock) on "December 1," according to Kumar. it is going to even have a lessen-cost "reserved ability" prepaid alternative that'll be in accordance with a "1 or 3-12 months term dedication" by using agencies, he introduced.
Azure experience Hubs for Apache KafkaMicrosoft announced on Wednesday that Azure event Hubs for Apache Kafka has reached conventional availability.
nearly, Microsoft introduced support for operating the Apache Kafka open supply platform on Azure experience Hubs, which is Microsoft's "cloud-native serverless answer" for dealing with "giant-scale, actual-time movement ingestion." Microsoft is touting the use of Apache Kafka on Azure in this manner as a result of corporations may not should bother with configuring it, nor will they have to manipulate servers or networks. businesses might not must exchange their Kafka-primarily based applications to make it work with Azure adventure Hubs, Microsoft promised.
Azure SQL information WarehouseMicrosoft had lots to assert in an announcement about improvement to its Azure SQL data Warehouse product, which supports operating queries throughout "petabytes of records." The "Gen 2" edition of Azure SQL statistics Warehouse was launched returned in April, the announcement stated.
A coming "Workload significance" feature will assist optimize question execution on Azure SQL data Warehouse. it would let corporations "use a single SQL facts Warehouse database to more efficaciously run distinct workloads, eliminating the complexity of separate facts warehouses for each and every answer," Microsoft defined. The Workload importance feature will be attainable "later this year at no extra charge."
a brand new Row-level security characteristic of Azure SQL statistics Warehouse has now reached general availability reputation, Microsoft introduced on Wednesday. Row-degree security gives organizations greater manage over who can access statistics, in accordance with the facts's vicinity in rows of tables. This characteristic is supported with the aid of both "SQL authentication and Azure energetic listing authentication," the announcement referred to. organizations create security guidelines in response to "filter predicates" to control access, besides the fact that children Microsoft plans so as to add support for "block predicates" soon. Row-level safety is at the moment obtainable in "a number of" Azure areas, however it's anticipated to be deployed global "within the subsequent two weeks." it will be purchasable at no further charge, the announcement indicated.
Microsoft added administration guide to Azure SQL statistics Warehouse by way of Azure consultant and Azure display screen, in accordance with a Wednesday announcement. both of those equipment are "configured through default" to work with Azure SQL information Warehouse.
Azure advisor now has an "Adaptive Cache" function for choosing when to scale the cache. It additionally has a "desk Distribution" feature for addressing workload efficiency considerations. Microsoft delivered a "Tempdb" characteristic to Azure guide so that IT professionals can "be aware when to scale and configure resource classes." Azure video display now suggests "near real-time metrics in the overview blade" for Azure SQL statistics Warehouse, the announcement indicated.
additionally, Azure computer screen now has a "Diagnostic Logs" means that will also be configured to demonstrate "historic query performance troubleshooting" suggestions, in accordance with a Wednesday announcement. These diagnostic log views are similar to what will also be viewed with the current Dynamic administration Views strategy, but interestingly they don't seem to be as restrained. for instance, the announcement defined that "DMVs have a limit of 10,000 rows that may without difficulty be passed for intensive enterprise information warehouse workloads with heavy query endeavor."
developers now have access to a preview of a "SQL Server statistics tool" in visible Studio, which is bringing alternate management support to Azure SQL Server statistics Warehouse, in keeping with a Wednesday announcement. it's a large deal for here causes, in keeping with the announcement:
at the moment, change management and deployment for SQL DW is a non-trivial effort the place valued clientele need to construct SQL and PowerShell scripts. This becomes an unmanageable event as up to date facts warehouse solutions can have over lots of of records pipelines and hundreds of database objects. This difficulty is exacerbated as facts warehouse deployments customarily have numerous environments for development, exams, and creation.
Microsoft is promising that the SQL Server facts device in visual Studio will add "a first class business-grade development event on your up to date information warehouse," with out a greater want for manual scripting.
Kurt Mackie is senior news producer for the 1105 commercial enterprise Computing community.
AUSTIN, Texas, Nov. 27, 2018 (GLOBE NEWSWIRE) -- SolarWinds (NYSE:SWI), a leading issuer of powerful and good value IT management software, today announced its participation at SQL Server live! 360 2018, December 2-7, 2018, in Orlando, Florida. SolarWinds will display the latest updates to its Microsoft® Azure® capabilities, designed to give a simple, effective event for full-stack monitoring, root cause evaluation, and optimized performance for DevOps and IT specialists operating on-prem, within the cloud, or in hybrid environments.
Microsoft named SolarWinds Head Geek™Thomas LaRock a ten-time Most positive skilled (MVP) for demonstrating his deep commitment to assisting others take advantage of their Microsoft technology. With greater than two decades of IT event, LaRock has served in the roles of programmer, developer, analyst, and database administrator. he's a Microsoft certified master, VMware® vExpert™, and Microsoft licensed coach.
“SolarWinds has been a depended on Microsoft associate for years; IT experts and developers have trusted our tools for pretty much twenty years,” pointed out Thomas LaRock, Head Geek, SolarWinds. “As greater of us flow to hybrid IT environments, the deserve to run, computer screen, and cozy servers and functions in the cloud will raise. These latest updates demonstrate how our options proceed to adapt to tackle the ever-changing needs of IT operations and security teams, SysAdmins, DevOps, and bosses alike.”
SolarWinds at booth 213
SolarWinds gives you finished monitoring of Microsoft technologies and environments—equipment designed to assure the efficiency of home windows® Servers, optimize Hyper-V® virtualized and private cloud infrastructures, and supply deep monitoring insights of utility workloads—together with active directory®, IIS™, trade™, SharePoint®, and greater. SolarWinds continues extending its monitoring capabilities to assist clients monitor Azure environments with the newest updates:
Key SolarWinds solutions highlighted at SQL Server are living! 360 2018 include:
For more tips on SolarWinds IT administration items, including downloadable, free 30-day reviews, visit the SolarWinds web page or name +1-866-530-8100.
Meet the Geek and be part of the discussion
those attending SQL Server reside! 360 2018, can have the following alternatives to engage with SolarWinds Head Geek Thomas LaRock:
join with SolarWinds
About Gartner Peer Insights purchasers’ ChoiceGartner Peer Insights consumers’ option constitute the subjective opinions of particular person end-consumer reports, scores, and facts applied in opposition t a documented methodology; they neither characterize the views of, nor represent an endorsement by way of, Gartner or its associates.
About SolarWindsSolarWinds (NYSE:SWI) is a leading company of potent and economical IT infrastructure management utility. Our products give organizations international, in spite of category, size or IT infrastructure complexity, the vigour to video display and manage the performance of their IT environments, even if on-premises, in the cloud, or in hybrid models. We invariably have interaction with every kind of expertise authorities—IT operations gurus, DevOps specialists, and managed service providers (MSPs)—to understand the challenges they face holding high-performing and highly attainable IT infrastructures. The insights we benefit from attractive with them, in locations like our THWACK online group, allow us to construct items that remedy well-understood IT management challenges in ways that technology authorities need them solved. This focus on the user and dedication to excellence in end-to-conclusion hybrid IT efficiency administration has based SolarWinds as a worldwide chief in network administration utility and MSP solutions. be trained greater these days at www.solarwinds.com.
The SolarWinds, SolarWinds & Design, Orion, and THWACK trademarks are the exclusive property of SolarWinds international, LLC or its affiliates, are registered with the U.S. Patent and Trademark workplace, and can be registered or pending registration in other countries. All different SolarWinds emblems, provider marks, and emblems may well be ordinary legislation marks or are registered or pending registration. All different logos outlined herein are used for identification applications handiest and are emblems of (and might be registered emblems of) their respective organizations.
© 2018 SolarWinds international, LLC. All rights reserved.MEDIA CONTACTS:Nicole Fachet Text100 cellphone: +1-212-871-3950 NicoleF@text100.com Jenne BarbourSolarWindsPhone: +firstname.lastname@example.org
It’s time for the subsequent edition of SQL Server, Microsoft’s flagship database product. The enterprise these days announced the first public preview of SQL Server 2019 and whereas yet a different replace to a proprietary database may additionally no longer look all that exciting at first look, Microsoft is trying to do a couple of fairly interesting issues with this replace.
What’s on the core of the entire most exciting updates is an acknowledgement that there are only a few companies that handiest use a single database product. So what Microsoft is doing with SQL Server is adding new connectors that permit business to use SQL Server to question different databases, including these of Oracle, Teradata and MongoDB. This turns SQL Server into anything of a digital integration layer — yet the statistics by no means needs to be replicated or moved to SQL Server.
however there is extra! SQL Server 2019 will come with built-in support for Spark and the Hadoop File device. That’s an acknowledgement of the recognition of those open-supply tools, as neatly as the magnitude of massive records workloads that SQL Server, if it needs to say significant, must be capable of help, too, and it has to do so in a way that many groups are already popular with.
There’s another open supply aspect here, too: SQL Server will aid these massive statistics clusters with the assist of the Google-incubated Kubernetes container orchestration gadget. every cluster will encompass SQL Server, the Hadoop file system and Spark.
As for the name, it’s value noting that many pundits anticipated a “SQL Server 2018,” but Microsoft opted to skip a year after SQL Server 2016 and 2017. So SQL Server 2019 it is.
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As part of my learning goals for 2018, I wanted to work through various books. This is part of my series on Pro SQL Server on Linux from Bob Ward.
I set up my Red Hat server as a command line only instance, so installing VSCode or Azure Data Studio aren’t options. I could add a graphical manager, but I decided not to for now. Instead, I want to use some of the tools from my local Windows machine.
If you’ve tried some networking with VMs recently, you’ll realize that this isn’t always simple. First, you need to figure out where your VM is. On Linux, ifconfig will do this.
However, when I go to SSMS and try to connect to 192.168.1.43, I get the network error that the SQL Server isn’t found. I know this is because of the firewall because my SQL Server is running locally on Linux and sqlcmd.exe works.
To open the firewall, on Red Hat you use the firewall-cmd command. This wasn’t in the book, so I had to search for the process. Once I did, this is a simple thing to do.
Now that this is open, let’s connect from SSMS. I can see that worked.
My first step is to create a database. The standard CREATE DATABASE works, but I can see when I query metadata that this isn’t Windows anymore.
From here I used scripts to create the objects in the sample database. That’s a first step to getting an application working. To get the scripts, I used:
git clone https://github.com/Apress/pro-sql-server-on-linux.git
This is the repo where Bob has his scripts. If you don’t know how to use git, start learning. I’ve got some posts, but there are lots of tutorials out there.
Once the database is created, with some tables and data, I can now work on an application. Bob is using a node app, which I’ve never written, so this is a chance to learn a little something new.
I tried the npm installs, but had issues. I kept getting errors from installing tedious. I had to change to use http: instead of https, and I was able to instally async, but I kept getting errors. I know this because:
Let’s try something else. I want to just connect, to see if my system is working. I could use SQLCMD, but let’s be creative.
I’m more comfortable in Python and this works. SQL Server 2019 here.
There is a good tutorial with some sample code at https://www.microsoft.com/en-us/sql-server/developer-get-started/python/windows/. I took some of the code from there to get this working.
In chapter 4, Bob shows how to use T-SQL and an application to read and write data. This is essentially sending SQL batches to the server, like I did with SELECT @@version above. I can do this stuff, and I know how to send batches. Executing code, including stored procedures, isn’t something I want to do here.
A number of the parts of chapters 3, 4, 5, 6, 7 are normal stuff that really are a part of working with any SQL Server version. There was little I saw in here that I hadn’t learned as a part of my work on Windows with SQL Server 2012/2014/2016/2017. Not that it’s not good content, but it’s more basic.
I read it anyway to get an idea of how Bob presents these things and there were good reminders of how things like Temporal tables or how bcp work. It’s worth reading if you aren’t familiar with the various concepts of working with SQL Server, getting performance information, and what tools are available. It certainly was a nice refresher for me.
From here, it’s moving on to more features, hoping that I see more Linux specific things.
In regards to the online Microsoft Official Practice Test run by analyticsexam.comThis practice test contains 172 questions and robust explanations.Passing Exam 70–461 counts as credit toward these certifications:Microsoft Certified Solutions Associate (MCSA): SQL Server 2012MCSA: Data PlatformMCSA: Business IntelligenceCandidates for your 70–461 exam are experts who build and run SQL queries. Candidates because of this exam needs to have hands-on knowledge about creating database objects, working together with data kept inOn this module you’ll get an summary of the SQL Server types of statements, other statement elements, and also the basic SELECT statements.Advanced SELECT StatementsThis module describes DISTINCT, aliases, scalar functions an incident, using JOIN and MERGE; filtering and sorting data, and NULL values.SQL Server Data Types and operationsThis module introduces data types, data type usage, converting data types, and understanding SQL Server function types.Grouping and Aggregating DataIn this module you’ll find out about aggregate functions, GROUP BY inside them for hours clauses, and subqueries; self-contained, correlated and EXISTS; views, and inline-table valued functions, and derived tables.SET Operators Grouping and Windows FunctionsWithin this module you’ll discover SET operators, Windows functions, and GROUPING sets (PIVOT, UNPIVOT, CUBE, ROLLUP).Modifying Data in SQL ServerThis module covers INSERT, UPDATE, and DELETE statements, and also the utilization of defaults, constraints, and triggers, and OUTPUT.
Programming with T-SQLIn this module, you’ll learn about using T-SQL programming elements, implementing error handling, and understanding and implementing transactions.Retrieving SQL Metadata and Improving SQL PerformanceThis module explains querying system catalogs and dynamic management views, creating and executing stored procedures, and improving SQL Server query performance.It is recommended that you review 70–461 exam preparation guide completely and become acquainted with the means on this website before you decide to schedule your 70–461 exam. See the Microsoft Certification exam overview for information regarding registration, videos of typical 70–461 exam question formats, and other preparation resources. For facts about 70–461 exam policies and scoring, see the Microsoft Certification exam policies and FAQs.This preparation guide is susceptible to change whenever you want without prior notice and also at the sole discretion of Microsoft. Microsoft 70–461 exams may include adaptive testing technology and simulation items. Microsoft does not identify the format by which exams are presented. Please utilize this preparation self-help guide to get ready for the 70–461 exam, regardless of its format. To assist you prepare for 70–461 exam, Microsoft recommends that you’ve hands-on knowledge about the item and you utilize the specified training resources. These training resources do not really cover all of the topics placed in the “Skills measured” section.For details about exam 70–461 sample questions take a look at our web portal: this site
Jan 7, 2015Varun Singh
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SQL Server 2012/2014 delivers compelling new capabilities that make an upgrade worthwhile. Many IT professionals agree that the AlwaysOn Availability Group (AG) feature offers the most value with its high availability (HA) capabilities to ensure continuous application availability.
Synchronous replication technology in AlwaysOn lets applications scale out like never before, using more resources on more servers. With read-only access to secondary databases, SQL Server 2012/2014 can dramatically increase database I/O capacity on the back end. Grouping databases together into an AG also allows companies to specify that certain databases connect to particular applications, ensuring that they failover together.
However, along the upgrade path, companies have also discovered key obstacles to achieving the new opportunities. Without awareness and understanding about these challenges – and their potential consequences – an organization’s upgrade to SQL Server 2012/2014 can be costly, inefficient, and plagued by system errors.Here are the top 5 SQL Server 2012/2014 ‘gotchas’ as well as tips for addressing them:
To avoid problems, as well as significant future rework, organizations need to address deprecated T-SQL features. For SQL Server 2012/2014, Microsoft will no longer support non-ANSI outer join syntax, requiring that all code be ANSI compliant.
Because every new release brings deprecation of earlier compatibility levels, companies must be aware of level changes and the impact on their applications. In the case of SQL Server 2012, applications will deprecate to 2000 compatibility, while SQL Server 2014 deprecates to 2005.
Companies also need to check with their ISVs to verify application support. Support may not be a given when compatibility levels become switched. An ISV with a contract to support an application on 2005 might not necessarily support it on 2012 running compatibility levels for 2005.
If at all possible, companies should test their applications and scale them to the most modern standards during any upgrade. Best practices dictate that organizations switch to the highest compatibility level of the upgraded SQL Server version. Not doing this puts off the inevitable and the work associated with it, making more work for companies in the long run.2-Be aware of licensing changes
With SQL Server 2012/2014, Microsoft has moved to a core-based licensing model for its Enterprise Edition. Regardless of the number of sockets or cores per-socket, organizations must now pay per core, and the licensing requires a minimum of 4 core licenses per physical processor. While minor variations exist due to individual licensing terms, moving to a 4-core enterprise license from a server license equates to a 4x cost difference on paper for most companies
The licensing changes also affect customers installing SQL Server 2012/2014 in a virtual environment. If a company runs SQL Server on a VM guest, a minimum of 4 cores must be licensed in the Enterprise Edition. This requirement can be frustrating, as a company using a 2-core VM, for example, must still license for 4 cores even if they are only using half of them.
It’s not all bad news. With significantly increased resource limits to the Standard Edition (up to 64 GB memory and 16 cores), companies also have a viable alternative to Enterprise Edition for the first time, as well as a solid migration path for the future. In addition, Microsoft has created the Business Intelligence Edition, delivering a Standard Edition SQL engine with the Enterprise Edition intelligence features.
In addition to paying attention to core count and understanding the licensing pitfalls, companies should consider other ways to offset the higher licensing costs. By maximizing usage of secondary servers to process read loads, organizations can reduce the need to buy larger servers with more cores. Caching can also help reduce the number of queries to be processed, letting companies maintain the needed performance while buying fewer cores. In some instances, database query caching has been able to handle 80% of the database load, sending just 20% to the SQL Server database.3-Leverage read/write split – with app changes
By allowing secondary servers to process read traffic instead of just sitting idle, AlwaysOn enables companies to serve more traffic and improve their application response times.
However, to leverage this capability, applications must be modified to build support for read-intent strings to connect to secondaries. Furthermore, applications need to be modified to identify which queries/stored procedures to route to secondaries. This application modification takes up a lot of time and resources, often delaying companies from benefitting from SQL Server 2012/2014’s new scale out features.
To solve this problem and avoid application modification, some companies have implemented either homegrown or third-party database traffic management software. Sitting between the application and the database, database traffic management software understands SQL syntax and can classify them as reads or writes. It can also discover the definition of a stored procedure from the database server to find out whether a particular stored procedure is a read-only or a read/write operation. With this detailed SQL state knowledge, the software can automatically load balance SQL traffic amongst primary and secondary servers, sending transactions and writes to the primary and distributing read-only traffic amongst the secondaries.
By offloading the need to build this intelligence into the application, companies can quickly take advantage of SQL Server 2012/2014’s advanced features.4-Ensure replication awareness
Because AlwaysOn is constantly replicating data from the primary server to the secondaries, the possibility emerges for replication lag. If the secondaries fall too far behind in replication, the data on secondary servers can become stale.
While the primary server remains the authoritative source for writing to the database in SQL Server 2012/2014, the secondary server now has the same data, which allows users to read from it. However, in supporting reads from the secondary, organizations must be aware that 1) the secondary server will always be a little behind the primary server; and 2) applications need to define the threshold of tolerance for delay, i.e., to what level that data can be “behind” in timing.
If applications are reading stale data, it can lead to inconsistent behavior. Different users might see different values for the same query, or – even worse – users might see older, incomplete data even when they have finished a transaction.
Modifying applications to support replication awareness can be a highly complex and costly process, requiring the organization to build a replication-monitoring engine and integrate it with application code. That modified application can then check to make sure that each server to which it is sending reads is in sync with the primary server. Adding to the complexity, most applications, such as .NET or PHP, are written like an integrated script, making it even more difficult and time-consuming to achieve replication awareness.
By integrating replication monitoring with load balancing and SQL flow control through the use of software, companies can establish a maximum replication delay threshold – without modifying any applications. Such software will not send reads to a secondary server that is more than one second behind the primary, for example. This approach keeps data access consistent even when supporting reads from secondary servers. The replication monitoring process can even alert administrators of potential networking or database issues that might have caused the replication lag or breakage in the first place.5-Enable automated failover
SQL Server 2012/2014 limits automated failover to servers sitting within a single data center, despite having the ability to scale beyond a single data center. With virtual network name (VNN, also referred to as the Active Group Listener), SQL Server 2012/2014 provides a method to discover the new primary when a server fails.
However, VNN has significant limitations since it redirects read-intent connections directly to the secondary server and does not act as an aggregation endpoint. This redirection can lead to increased downtime and application errors during failover as both the primary being failed and the secondary being promoted will drop their connections.
One way around this limitation is to deploy software that acts as an abstraction layer between the database and the application. In this architecture, that software replaces the VNN as the destination for SQL connections. The software then routes SQL queries on behalf of the app, with detailed understanding of all queries. This architecture enables failover that is transparent to the application – with no dropping of the connections and queuing of inbound traffic so applications see few to no errors.Bottom Line - Focus on the Big Picture
At the end of the day, a database upgrade is never just about the database. SQL Server 2012/2014’s new capabilities, including the AlwaysOn HA features, promise huge benefits, but they also create significant complexity.
Companies must consider how an upgrade affects not only performance and costs but also other parts of their infrastructure. The challenges of programming applications to understand and leverage scaled out database infrastructure are many.
An upgrade can be a good time to consider making other architectural changes – such as creating an abstraction layer using a SQL proxy or database load balancing software.
About the author:
Varun Singh, Founder and CTO, ScaleArc
As Chief Technology Officer, Varun leads ScaleArc’s product development and technology strategy. Varun also served as ScaleArc’s CEO from March 2009 to Sept 2013. Varun is a technologist with broad experience in several fields, from running Linux-based BBS systems in the pre-Internet days to writing about technology and open source software at PC Quest, CHIP, Digit, and Network Computing, to creating India’s top online technology brands such as TechTree and Tech2, to hosting technology shows on CNBC, TV18, CNN-IBN and ET Now. He led large web and application development teams as CTO at Network 18's web division and built the highly scalable technology behind large websites like IN.com, MoneyControl.com, and various other portals.
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