12 2021 档案

MYSQL统计多个count_mysql 不同条件count ，多条件count()
摘要：create table abc(A int,B int) Select A,count(B) as total from ABC group by A Select A,count(B) as total1 from ABC where B > 30 group by A Select A,cou 阅读全文
posted @ 2021-12-23 13:21 所向披靡zz 阅读(831) 评论(0) 推荐(0) 编辑

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