Beginning Microsoft SQL Server 2008 ... - S3 Tech Training
Beginning Microsoft SQL Server 2008 ... - S3 Tech Training Beginning Microsoft SQL Server 2008 ... - S3 Tech Training
Appendix A: System Functions UNICODE The UNICODE function returns the Unicode number that represents the first character in character_ expression. The syntax is as follows: UPPER UNICODE(‘’) The UPPER function converts all the lowercase characters in character_expression into uppercase characters. The syntax is as follows: UPPER() System Functions 638 The system functions – the more longstanding way of referring to what Microsoft is now referring to simply as “other” – can be used to return information about values, objects and settings with SQL Server. The functions are as follows: ❑ APP_NAME ❑ CASE ❑ CAST and CONVERT ❑ COALESCE ❑ COLLATIONPROPERTY ❑ CURRENT_TIMESTAMP ❑ CURRENT_USER ❑ DATALENGTH ❑ FORMATMESSAGE ❑ GETANSINULL ❑ HOST_ID ❑ HOST_NAME ❑ IDENT_CURRENT ❑ IDENT_INCR ❑ IDENT_SEED ❑ IDENTITY ❑ ISDATE ❑ ISNULL ❑ ISNUMERIC
❑ NEWID ❑ NULLIF ❑ PARSENAME ❑ PERMISSIONS ❑ ROWCOUNT_BIG ❑ SCOPE_IDENTITY ❑ SERVERPROPERTY ❑ SESSION_USER ❑ SESSIONPROPERTY ❑ STATS_DATE ❑ SYSTEM_USER ❑ USER_NAME APP_NAME The APP_NAME function returns the application name for the current session if one has been set by the application as an nvarchar type. It has the following syntax: CASE APP_NAME() The CASE function evaluates a list of conditions and returns one of multiple possible results. It also has two formats: ❑ The simple CASE function compares an expression to a set of simple expressions to determine the result. ❑ The searched CASE function evaluates a set of Boolean expressions to determine the result. Both formats support an optional ELSE argument. Simple CASE function: CASE WHEN THEN ELSE END Searched CASE function: CASE WHEN THEN ELSE END Apendix A: System Functions 639
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❑ NEWID<br />
❑ NULLIF<br />
❑ PARSENAME<br />
❑ PERMISSIONS<br />
❑ ROWCOUNT_BIG<br />
❑ SCOPE_IDENTITY<br />
❑ SERVERPROPERTY<br />
❑ SESSION_USER<br />
❑ SESSIONPROPERTY<br />
❑ STATS_DATE<br />
❑ SYSTEM_USER<br />
❑ USER_NAME<br />
APP_NAME<br />
The APP_NAME function returns the application name for the current session if one has been set by the<br />
application as an nvarchar type. It has the following syntax:<br />
CASE<br />
APP_NAME()<br />
The CASE function evaluates a list of conditions and returns one of multiple possible results. It also has<br />
two formats:<br />
❑ The simple CASE function compares an expression to a set of simple expressions to determine<br />
the result.<br />
❑ The searched CASE function evaluates a set of Boolean expressions to determine the result.<br />
Both formats support an optional ELSE argument.<br />
Simple CASE function:<br />
CASE <br />
WHEN THEN <br />
ELSE <br />
END<br />
Searched CASE function:<br />
CASE<br />
WHEN THEN <br />
ELSE <br />
END<br />
Apendix A: System Functions<br />
639
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