A field with maintaining multiple values, separated, to match with the like, can be written in SQL?

 
SELECT count (0) FROM LMDN a WHERE EXISTS 
(SELECT * FROM APPCONFIG WHERE key='CheckSend' and Amy polumbo O like?? ) 

If no query first, then take out data, after the split cycle like judgment

CodePudding user response:

A field this don't understand can maintain multiple values with examples explain?