How to remove part of string in mysql?

Question

In one table of my database I have strings which looks like this one:

sometext-othertext

How to remove the text including dash with SELECT

Answer 1

just use :

SELECT SUBSTRING_INDEX('sometext-othertext', '-', 1);

Function have 3 prameters, first that is a text, second is object for spliting, and number (1) for getting you want (the controller)