MSSQL 中 Stuff 的应用

MSSQL 中 Stuff 的应用

select stuff(stuff(convert(char(8),getdate(),112),5,0,N'Year'),11,0,N'Month')+'Day'
SELECT STUFF(STUFF(CONVERT(char(8),getdate(),112),5,0,N'年'),8,0,N'月')+N'日'

---Result---
--------------------
2008Year11Month06Day

(1 row(s) affected)

-----------
2008年11月06日

(1 row(s) affected)

STUFF
Deletes a specified length of characters and inserts another set of characters at a specified starting point.

Syntax
STUFF ( character_expression , start , length , character_expression )

Arguments
character_expression

Is an expression of character data. character_expression can be a constant, variable, or column of either character or binary data.

start

Is an integer value that specifies the location to begin deletion and insertion. If start or length is negative, a null string is returned. If start is longer than the first character_expression, a null string is returned.

length

Is an integer that specifies the number of characters to delete. If length is longer than the first character_expression, deletion occurs up to the last character in the last character_expression.

Return Types
Returns character data if character_expression is one of the supported character data types. Returns binary data if character_expression is one of the supported binary data types.

Remarks
String functions can be nested.

Examples
This example returns a character string created by deleting three characters from the first string (abcdef) starting at position 2 (at b) and inserting the second string at the deletion point.

SELECT STUFF('abcdef', 2, 3, 'ijklmn')
GO

Here is the result set:

---------
aijklmnef

(1 row(s) affected)