Export (0) Print
Expand All
ABS
ALL
AND
ANY
AVG
bit
COS
COT
DAY
EXP
GO
IN
LEN
LOG
MAX
MIN
NOT
OR
PI
SET
SIN
STR
SUM
TAN
USE
VAR
Expand Minimize

LEFT

SQL Server 2000

Returns the left part of a character string with the specified number of characters.

Syntax

LEFT ( character_expression , integer_expression )

Arguments

character_expression

Is an expression of character or binary data. character_expression can be a constant, variable, or column. character_expression can be of  any data type (except text or ntext) that can be implicitly converted to varchar or nvarchar. Otherwise, use the CAST function to explicitly convert character_expression.

integer_expression

Is a positive integer that specifies how many characters of the character_expression will be returned. If integer_expression is negative, an error is returned.

Return Types

varchar or nvarchar.

Remarks

Compatibility levels can affect return values. For more information about compatibility levels, see sp_dbcmptlevel.

Examples
A. Use LEFT with a column

This example returns the five leftmost characters of each book title.

USE pubs
GO
SELECT LEFT(title, 5) 
FROM titles
ORDER BY title_id
GO

Here is the result set:

----- 
The B 
Cooki 
You C 
Strai 
Silic 
The G 
The P 
But I 
Secre 
Net E 
Compu 
Is An 
Life  
Prolo 
Emoti 
Onion 
Fifty 
Sushi 

(18 row(s) affected)
B. Use LEFT with a character string

This example uses LEFT to return the two leftmost characters of the character string abcdefg.

SELECT LEFT('abcdefg',2)
GO

Here is the result set:

-- 
ab 

(1 row(s) affected)

See Also

Data Types

String Functions

Show:
© 2014 Microsoft