Fetch data from two different tables in one query

问题

On my webserver there is a database with following two tables:

tbl_Friend                                    tbl_Colleague

| id | Name | First name | Place |            | id | Name | First name | Place | 
----------------------------------            ----------------------------------
|  1 | XXXX | XXXXXXXXXX |   1   |            |  1 | AAAA | AAAAAAAAAA |   1   |
|  2 | YYYY | YYYYYYYYYY |   2   |            |  2 | BBBB | BBBBBBBBBB |   3   |
|  3 | ZZZZ | ZZZZZZZZZZ |   1   |            |  3 | CCCC | CCCCCCCCCC |   4   |

Now I want to fetch all Persons from tbl_Friend and tbl_Colleague who live in place 1. For that I have to the data from both tables and here is my problem: How can I fetch data from two different tables in only one query? My result should look like this:

| id | Name | First name | Place |
----------------------------------
|  1 | XXXX | XXXXXXXXXX |   1   |
|  1 | AAAA | AAAAAAAAAA |   1   |
|  3 | ZZZZ | ZZZZZZZZZZ |   1   |

Can I use something like FROM tbl_Friend | tbl_Colleague or something else? Or do I have to use a Join for this?

回答1:

Try this:

SELECT id, Name, First name, Place FROM tbl_Friend
  WHERE Place= 1
UNION ALL
SELECT id, Name, First name, Place FROM tbl_Colleague
  WHERE Place= 1

回答2:

try this:

select * from tbl_friend a, tbl_colleague b where a.place = b.place and place like '1';

来源：https://stackoverflow.com/questions/23281450/fetch-data-from-two-different-tables-in-one-query