求一个Select语句:怎样在两个字段中选择,合并生成一个字段,并排列 select a as c from t1 union select b from t2 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 select A c from t1select B c from t2order by c select * from (select a from t1union allselect b from t2) tem order by a 写错了应该是:select A c from t1 unionselect B c from t2order by c Select tem.A from (Select A From t1 Union All Select B From t2)tem Order by tme.A select c from ( select a as c from t1 union all select b from t2) aa order by c 请教一条删除重复字段的语句 求Sql 有关于数据库学习问题! 求多表联合查询语句。 请问SQL有什么比较方便的转义方式? where后面如何用case..when 我想问大家这段SQL代码,为什么pivot函数为什么要用sum,它不是求和吗? Loop Join是什么意思,有什么效果,谁能举一个例子 与服务器当前日期比较的问题? 如何制作 具有剪切、复制、粘贴、撤消、重做、等功能的菜单? 紧急求救!我使用聚合函数时候遇到的问题! 救急啊,各位大哥,請問一下.FMK格式的文件用什麼可以打開,在線等待...
select A c from t1
select B c from t2
order by c
select a from t1
union all
select b from t2) tem order by a
应该是:
select A c from t1 union
select B c from t2
order by c