How can I check whether a number is contained in comma separated list stored in a varchar column?

Question

I have a table with a varchar column categoryIds. It contains some IDs separated by commas, for example:

id       categoryIds
-----         


        

Answer 1

use FIND_IN_SET() mysql function

Syntax

SELECT * FROM  as a WHERE FIND_IN_SET(value to search in string,comma separated string);
Example
SELECT * FROM 
 as a WHERE FIND_IN_SET(5,"1,2,3,4,5,6");

                                                        

              
                
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