MS Access / SQL-连接两个表

Question

我有两个表tbl_sbc和tbl_jdf，两个表都有“用户”和“访问”字段。 我想基于来自tbl_sbc和tbl_jdf的用户相等性创建一个新表，并总结访问。

示例

tbl_sbc

User Access
Foo  20
Bar  5

tbl_jdf

User Access
Foo 35
Beef 50

输出

User Access
Foo  55
Bar  5
Beef 50

我将如何去做？我似乎无法总结这些值

Answer 1

你在这里

Select User, Sum(Access) As Total from
(Select User , Access from tbl_sbc
Union All
Select User , Access from tbl_jdf)
Group by User
order by user desc