SQL学习笔记八索引，表连接，子查询，ROW_NUMBE

来源：互联网收集：自由互联发布时间：2021-04-05

索引经常要查询的语句，则给它建一个索引表连接 select T_Oders as o join T_Customers as C on o.CustomerId = c.Id 子查询单值子查询单列多值子查询 ROW_NUMBER()函数 ROW_NUMBER() OVER(ORDER BY Fsalary DESC

索引

经常要查询的语句，则给它建一个索引

表连接

select T_Oders as o join T_Customers as C on o.CustomerId = c.Id

子查询

单值子查询

单列多值子查询

ROW_NUMBER()函数

ROW_NUMBER() OVER(ORDER BY Fsalary DESC)