i have tables t1 and t2 and t3 my question is i want query to sum three coumns (in and out and w ) in three table to be 135 and i use these codei have tables t1 and t2 and t3 my question is i
阅读背景：
使用union查询将三个不同表中的三列相加?
来源：互联网
分享到：
