Re: [SQL] How To Use JOIN?

Takashi Tokunaga wrote:
>Hello PGSQL users, I'm having trobule using join statement:

>3. Now after that worked without any problem, so I now create SELECT
> statement:
>
> select * from test1 test2 where code_1 = test.code_2 \g
> ERROR: attribute 'code_2' not found
>
>nope that didn't work
>
> select test1.name_1 from test1 test2 where test1.code_1 = test2.code_2 \g
> ERROR: attribute 'code_2' not found
>
>Umm... still no change.

junk=> select * from test1, test2 where code_1 = test2.code_2
junk-> ;
name_1|code_1|name_2|code_2
------+------+------+------
10| 1| 11| 1
11| 2| 11| 2
(2 rows)

junk=> select test1.name_1 from test1, test2 where test1.code_1 = test2.code_2 ;
name_1
------
10
11
(2 rows)

You omitted the comma between the table names in the FROM clause.

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