Mysql Instr Function

MySQL: INSTR Function

This tutorial explains how to use the MySQL INSTR function with syntax and examples.


The MySQL INSTR function returns the location of a substring in a string.


The syntax for the INSTR function in MySQL is:

INSTR( string, substring )

Parameters or Arguments


The string to search.


The substring to search for in string.


  • The first position in string is 1.
  • When finding the location of a substring in a string, the INSTR function does not perform case-sensitive search.
  • If substring is not found in string, then the INSTR function will return 0.

Applies To

The INSTR function can be used in the following versions of MySQL:

  • MySQL 5.7, MySQL 5.6, MySQL 5.5, MySQL 5.1, MySQL 5.0, MySQL 4.1, MySQL 4.0, MySQL 3.23


Let's look at some MySQL INSTR function examples and explore how to use the INSTR function in MySQL.

For example:

mysql> SELECT INSTR('', 'B');
Output: 4

mysql> SELECT INSTR('', 'com');
Output: 7

mysql> SELECT INSTR('', 'Z');
Output: 0