Re: postgres insert + select + values - Pgsql 9.5

On 16/09/16 07:45, Patrick B wrote:
> Hi guys,
>
>
> I got the test1 table with three columns:
>
> id(BIGINT) - j_id(BIGINT) - comments(CHARACTER VARYING)
>
>
> *This needs to be done 180 times:*
>
> INSERT INTO test1 (id,j_id,comments) VALUES (default,123321,'test-1
> - comments');
> INSERT INTO test1 (id,j_id,comments) VALUES (default,123322,'test-1
> - comments');
> INSERT INTO test1 (id,j_id,comments) VALUES (default,123323,'test-1
> - comments');
> INSERT INTO test1 (id,j_id,comments) VALUES (default,123324,'test-1
> - comments');
> INSERT INTO test1 (id,j_id,comments) VALUES (default,123325,'test-1
> - comments');
>
>
> *However, I have to get j_id from another table:*
>
> select j_id from test2 WHERE customer_id = 88897
>
>
> 17012651
> 17012601
> 16623374
> 16808986
> 16843879
> 16808794
> 16870199
> 16870488
> 16870443
> 16870403
>
>
>
> *Example of what I need:*
>
> INSERT INTO test1 (id,j_id,comments) VALUES
> (default, 17012651,'test-1 - comments');
> INSERT INTO test1 (id,j_id,comments) VALUES
> (default, 17012601,'test-1 - comments');
> INSERT INTO test1 (id,j_id,comments) VALUES
> (default, 16623374,'test-1 - comments');
> INSERT INTO test1 (id,j_id,comments) VALUES
> (default, 16808986,'test-1 - comments');
> INSERT INTO test1 (id,j_id,comments) VALUES
> (default, 16843879,'test-1 - comments');
>
>
> etc...
>
> How can I do that? If the customer_id is the same for all those 180 rows?

A select can make up columns too, not just what you've got in a table,
so you can:

select j_id, 'test-1 - comments' as comment from test2 where
customer_id=88897;

and then you can simply insert that into your other table (you don't
need to specify the columns that are getting a default value):

insert into test1 (j_id, comments)
select j_id, 'test-1 - comments' as comment from test2 where
customer_id=88897;

https://www.postgresql.org/docs/current/static/sql-insert.html has more
info.

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