"select a.*,b.* from tb_Card as a join tb_Module as b on a.ModuleID=b.Module
题目
"select a.*,b.* from tb_Card as a join tb_Module as b on a.ModuleID=b.Module
答案
select a.*,b.* from tb_Card as a join tb_Module as b on a.ModuleID=b.Module
这句等效于
"select a.*,b.* from tb_Card a,tb_Module b where a.ModuleID=b.Module
查询俩表中 a.ModuleID=b.Module 的数据
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
最新试题
- the rider and the bike__knocked the general off were taken to the police-station
- 有没有be bored doing,be bored to do,be bored in doing,be bored in to do?
- What is spring weather like?初2英语作文谁有超急!
- 怎么抑扬顿挫
- 翻译成英语：名言警句 谚语
- 一张餐桌可坐6人,两张餐桌可坐10人,三张餐桌可坐14人按此规律摆放,要坐98人,需要几张餐桌?
- 上面三个力,下面一个月读什么?
- 已知二次函数f x =ax^2+bx+c(x∈R)当X=2时,函数取得最大值2,其图像在X轴上截得线段长为2,求其解析式.
- Please translate these sentences into Chinese,many thanks~
- 朋友给我出了一道数学题,横竖九个格子,填入1-9,让它每行都是1-9九个数而不重复!
热门考点