Returns a specified number of characters from the beginning of a string.
LEFT ( string-expression, numeric-expression )
numeric-expression The number of characters to return.
The following statement returns the value choco.
SELECT LEFT( 'chocolate', 5 ) FROM iq_dummy
If the string contains multibyte characters, and the proper collation is being used, the number of bytes returned may be greater than the specified number of characters.
Chapter 11, “International Languages and Character Sets” in the Sybase IQ System Administration Guide