SQL Server Interview Questions and Answers – Part 3 What is a NOLOCK? Using the NOLOCK query optimiser hint is generally considered good practice in order to improve concurrency on a busy system. When the NOLOCK hint is included in a SELECT statement, no locks are taken when data is read...
A stored procedure is a named group of SQL statements that have been previously created and stored in the server database. Stored procedures accept input parameters so that a single procedure can be used over the network by several clients using different input data. And when the procedure is ...
So why an interview question book on SQL Server? If you look at any .NET interview conducted in your premises both parties (Employer and Candidate) pay no attention to SQL Server even though when it is such an important part of development project. They will go talking about stars (OOP, ...
3. You have got a request to execute a query which is an “Update” query. That update is updating 5 million rows, after an hour it’s still executing and you are getting lot of requests from report users that their things are getting slow down. What’s your action plan? 4. See I...
%programfiles%\Microsoft SQL Server\100\Setup Bootstrap\Log\<YYYYMMDD_HHMM>\ Detail.txt Detail.txt is generated for the main workflow such as install or upgrade, and provides the details of the execution. The logs in the file are generated based on the time when each action for the install...
Some of the tools/ways that help you troubleshooting performance problems are: SET SHOWPLAN_ALL ON, SET SHOWPLAN_TEXT ON, SET STATISTICS IO ON, SQL Server Profiler, Windows NT /2000 Performance monitor, Graphical execution plan in Query Analyzer. Download the white paper on performance tuning SQL...
When we execute a query and use theWHEREkeyword on a column that does not have an index, then the SQL Server has to do a full-table scan and check every row to find matches. This is a bad practice because it can be unpredictable in terms of execution time. Therefore this process may...
Top 30 SQL Server Interview Questions (2024) This comprehensive guide provides a curated list of SQL Server interview questions and answers, covering topics from basic concepts to advanced techniques, to help you prepare for your next data-related interview. Kevin Babitz 14 min blog Data Science ...
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SQL is Structured Query Language, which is a computer language for storing, manipulating and retrieving data stored in relational database.SQL can be used in different languages or database management systems like Oracle,SQL Server,Postgresql. ...