Beginning Microsoft SQL Server 2008 ... - S3 Tech Training

The user parameter is the username to be used. If no value for user is provided, the current user is used.
USER_NAME
The USER_NAME function is the functional reverse of USER_ID, and returns the specified user’s username
in the database given a database ID number. The syntax is as follows:
USER_NAME([‘’])
The user id parameter is the id of the user you want the name for. If no value for user id is provided,
the current user is assumed.
String Functions
The string functions perform actions on string values and return strings or numeric values. The string
functions are:
❑ ASCII
❑ CHAR
❑ CHARINDEX
❑ DIFFERENCE
❑ LEFT
❑ LEN
❑ LOWER
❑ LTRIM
❑ NCHAR
❑ PATINDEX
❑ QUOTENAME
❑ REPLACE
❑ REPLICATE
❑ REVERSE
❑ RIGHT
❑ RTRIM
❑ SOUNDEX
❑ SPACE
❑ STR
❑ STUFF
❑ SUBSTRING
Apendix A: System Functions
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