显示具有来自不同表的匹配数据的 SQL 表记录

Question

I am very new to SQL, and I am trying to filter a set of records from one table based on matching columns from another table. Here is an example of what I would like to do: I have two tables, I'll call them TableA and TableB. I have already applied a search on both Tables to filter their separate results down, but I want to filter TableA based on matching records from TableB. TableA:

TableB:

Desired Result in TableA format:

TableB and TableA have matching ID columns, and I only want to display the records in TableA if the records also appear in TableB, but I need them to appear in TableA format.

Answer 1

一个简单的连接就可以做到这一点。

select TableA.* from TableA inner join TableB on TableB.ID = TableA.IB

Answer 2

You can use exists :

select a.*
from a
where exists (select 1 from b where a.id = b.id);

Answer 3

你需要做类似的事情

Select a.id, a.first_name, a.last_name, a.birthday, a.ssn from TableA a, Table b where a.id=b.id