SQL Reference

Quick Reference

The MySQL SUBSTRING_INDEX() function returns a substring of a string before a specified number of delimiter occurs.

SELECT SUBSTRING_INDEX('1smartchicken.com', '.', 1);

Output

SUBSTRING_INDEX('1smartchicken.com', '.', 1)
1smartchicken

Syntax

SUBSTRING_INDEX(string, delimiter, number)

Parameters

ParameterDescription
stringThe original string (required)
eliminatorThe delimiter to search for (required)
numberThe number of times to search for the delimiter; if a positive number, returns all to the left of the delimiter; if a negative number, returns all to the right of the delimiter (required)

SQL Notes:

  • Any work being done to modify the structure of a database or delete tables or the the database itself should only be done after making a recent backup

We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.