Can I combine values from multiple rows in another table into multiple columns of one row using SQL?

Posted by Jordi on Stack Overflow See other posts from Stack Overflow or by Jordi
Published on 2010-12-24T10:34:46Z Indexed on 2010/12/24 10:53 UTC
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I have two tables: T1:

| M_ID | P_ID1 | P_ID2 | rest of T1 columns |
|  0   |   0   |   1   |         ...        |
|  1   |   2   |   3   |         ...        |

T2:

| P_ID | Type | A | B |
|  0   |   1  | a | e |
|  1   |   2  | b | f |
|  2   |   1  | c | g |
|  3   |   2  | d | h |

Now, I want to have a query that selects this:

| M_ID | P_1a | P_1b | P_2a | P_2b | rest of T1 columns |
|  0   |  a   |  e   |  b   |  f   |         ...        |
|  1   |  c   |  g   |  c   |  h   |         ...        |

So, in words: I want to select all columns from T1, but I want to replace P_ID1 with the columns from T2, where the P_ID is equal to P_ID1, and the type is 1, and basically the same for P_ID2.

I can obviously get the information I need with multiple queries, but I was wondering if there is a way that I can do this with one query. Any ideas?

I'm currently using SQL Server 2008r2, but I'd also be interested in solutions for other database software.

Thanks for the help!

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