mysql tag 标签统计

数据

News表

创建个从0递增的数据表帮助查询

表名listdb

查询语句

SELECT

SUBSTRING_INDEX(SUBSTRING_INDEX(tag,',',id_table.id+1),',',-1) AS tagname,count(tag) as tagname_count

FROM

news

JOIN

listdb AS id_table

ON

id_table.id <(LENGTH(tag)-LENGTH(REPLACE(tag,',',''))+1) GROUP BY

tagname

ORDER BY

tagname_count desc

语句挺抽象的，理解下来费了我好大劲 o(╥﹏╥)o

结果