摘要:
with as语法–针对一个别名with tmp as (select * from tb_name)–针对多个别名with tmp as (select * from tb_name), tmp2 as (select * from tb_name2), tmp3 as (select * fro... 阅读全文
摘要:
SQL查询语句,怎样查询重复数据2012-02-22 14:50神奇的马骁勇|浏览 0 次有表A, 中有字段id, name, memo现在有很多id重复的数据,怎么把这些重复的都查出来?group by? 请写出SQL语句, 谢谢提问者采纳select id, name, memofrom... 阅读全文