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MYSQL

SUBSTRING()


Description

The SUBSTRING( ) function returns the characters of a given string, starting from the position pos. .

This function has the form:

SUBSTRING(str, pos[, len])
SUBSTRING(str FROM pos[ FOR len])
Parameter Description
str String
pos Position
len (optional) Length

Return Value

A substring from string str starting at pos (position) with a len argument. It returns a substring len character from string str starting at pos (position), without a len argument.

Examples

The following example shows the basic use of this function:

mysql> SELECT SUBSTRING('Quadratically',5);
-> 'ratically'
mysql> SELECT SUBSTRING('foobarbar' FROM 4);
-> 'barbar'
mysql> SELECT SUBSTRING('Quadratically',5,6);
-> 'ratica'
mysql> SELECT SUBSTRING('Sakila', -3);
-> 'ila'
mysql> SELECT SUBSTRING('Sakila', -5, 3);
-> 'aki'
mysql> SELECT SUBSTRING('Sakila' FROM -4 FOR 2);
-> 'ki'


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