1.模糊查找,中间有逗号分隔
SELECT * from d_tag where FIND_IN_SET(2,tag_id)-------------
SELECT*fromd_tagwhere-- CONCAT_WS (tag_id,1,2,3,4)(FIND_IN_SET('1',tag_id) or FIND_IN_SET('2',tag_id) or FIND_IN_SET('33',tag_id))