Getting started with Microsoft SQL Server OVER Clause PIVOT / UNPIVOT Database Snapshots Retrieve information about the database The STUFF Function FOR XML PATH Cursors Join Common Table Expressions Move and copy data around tables Dates Limit Result Set Retrieve Information about your Instance With Ties Option Variables JSON in Sql Server Window functions Partitioning Stored Procedures GROUP BY Generating a range of dates COALESCE Split String function in Sql Server INSERT INTO CREATE VIEW String Functions Resource Governor ORDER BY WHILE loop System database - TempDb Migration Primary Keys MERGE Full-Text Indexing FOR JSON SELECT statement DBMAIL Index Queries with JSON data Storing JSON in SQL tables OPENJSON Ranking Functions Trigger Converting data types NULLs Transaction isolation levels Advanced options IF...ELSE TRY/CATCH Data Types User Defined Table Types Table Valued Parameters In-Memory OLTP (Hekaton)Temporal Tables Insert Sequences SCOPE_IDENTITY()Views Use of TEMP Table Scheduled Task or Job Isolation levels and locking Sorting/ordering rows Privileges or Permissions Foreign Keys SQLCMD File Group cross apply Basic DDL Operations in MS SQL Server Computed Columns UNION Subqueries Last Inserted Identity CLUSTERED COLUMNSTORE Parsename Installing SQL Server on Windows Aggregate Functions Querying results by page Schemas Backup and Restore Database Transaction handling Natively compiled modules (Hekaton)Database permissions Spatial Data Dynamic SQL Pagination Query Hints Modify JSON text Row-level security Dynamic data masking Export data in txt file by using SQLCMD Encryption Managing Azure SQL Database Common Language Runtime Integration Delimiting special characters and reserved words CASE Statement DBCC BULK Import Query Store Service broker Analyzing a Query Microsoft SQL Server Management Studio Shortcut Keys Permissions and Security PHANTOM read Filestream Drop Keyword String Aggregate functions in SQL Server SQL Server Evolution through different versions (2000 - 2016)SQL Server Management Studio (SSMS)Logical Functions Dynamic SQL Pivot Alias Names in Sql Server bcp (bulk copy program) Utility

Logical Functions

CHOOSE

SQL Server 2012

Returns the item at the specified index from a list of values. If index exceeds the bounds of values then NULL is returned.

Parameters:

index: integer, index to item in values. 1-based.
values: any type, comma separated list

SELECT CHOOSE (1, 'apples', 'pears', 'oranges', 'bananas') AS chosen_result

chosen_result
-------------
apples

IIF

SQL Server 2012

Returns one of two values, depending on whether a given Boolean expression evaluates to true or false.

Parameters:

boolean_expression evaluated to dtermine what value to return
true_value returned if boolean_expression evaluates to true
false_value returned if boolean_expression evaluates to false

SELECT IIF (42 > 23, 'I knew that!', 'That is not true.') AS iif_result

iif_result
------------
I knew that!

SQL Server 2012

IIF may be replaced by a CASE statement. The above example my be written as

SELECT CASE WHEN 42 > 23 THEN 'I knew that!' ELSE 'That is not true.' END AS iif_result

iif_result
------------
I knew that!

Contributors

Topic Id: 10647

Example Ids: 31954,31955

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