A Series of SQL Server basics to advanced level SQL Interview questions and answers that are commonly asked in interivew.
Assume that you have a table which contains alphabetic, numeric, alphanumeric string, and special characters and you are asked to fetch only alphanumeric string from those strings. Following is the sample table named Numbers which…
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SQL Server indexes are used by queries to find data values quickly in tables and views. Basically it speed up the queries performance. You can also relate a SQL Server Indexes with any text book…
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SQL Server update statement is used used to modify an existing records in a table, you can also update records in table based on some specific conditions. Following is the basic syntax of update statement….
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Sometimes, you need to store multi language or multilingual data in any table column. Inserting a multilingual data into column without following some basics rules, you see that when you select data from table, it…
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Sometimes, you want to store the result of a stored procedure into table or temp table instead of returning the output. Storing output of stored procedure into table enables more option for you, such as…
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Sometimes you need to format a date in specific format such as format a date time string YYYY-MM-DD hh:mm:ss. mmm to date MM:DD:YY. SQL Server provides you a various options that you can use to…
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Sometime you are required to validate the row counts for each tables in database. So getting a row counts for each tables either through using a loop on each table or go and get row…
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There are various in-built system catalog views, or metadata functions that you can use to check the existence of column in SQL Server tables. To demonstrate this, first we create a table in SQL Server…
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You can script a table from database using a SQL Server Management Studio. SQL Server Management allows you to script out tables from database using a Script table as option. This option can be used…
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You can generate a database scripts including the schema and the data by using the Generate Scripts option available in SQL Server Management Studio (SSMS), which generates a scripts for selected database. When you perform…
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Table Value Constructor (TVC) allows to group multiple rows of data in a single DML statement. It can be used as a part of either the VALUES clause of an INSERT INTO VALUES statement, or…
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Selecting a top n records for each category from any table, can be done easily using row_number function which generates a sequential integer to each row within a partition of a result set. To understand…
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The IDENT_CURRENT function returns the last IDENTITY value generated for any specific table or view on an identity column in any session and any scope. This function is limited only to a specific table or…
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How to find and separate the numbers, letters and special characters from string? Suppose you a column in table which contains a mix words which may includes numbers, letters, and special characters, or either numbers…
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Xp_readerrorlog is a SQL Server extend stored procedure allows you read the contents of the SQL Server error log files. It allows you to read the SQL Server and SQL Server Agent error logs. SYNTAX…
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The sp_procoption is a SQL Server system stored procedure allows us to Set or clear a stored procedure for automatic execution when an instance of SQL Server is started. A startup procedures must be in…
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How to change the Collation of table column to Case insensitive or Case sensitive? Lets prepare a sample table called DumpData, and insert few records as shown below. CREATE Table dbo.DumpData (ID INT, Name VARCHAR(50)…
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How to copy or delete files from directory in SQL Server ? It can be done using xp_cmdshell which is SQL Server built in system stored procedure is used to commands directly in the windows…
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How to get a last access time for tables in SQL Server ? To get the last time when table was accessed in SQL Server, you can use SQL Server dynamic management view sys.dm_db_index_usage_stats, which…
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