PL> ------------------------------------------------------------
PL> -- QUERY
PL> ------------------------------------------------------------
PL> SELECT
PL> master_name,
PL> detail_name,
PL> type
PL> FROM
PL> master INNER JOIN detail
PL> ON master.id = detail.id_master
PL> INNER JOIN type
PL> ON detail.code_type = type.code
PL> ORDER by master.id, detail.id;
PL> ------------------------------------------------------------
PL> The result of that is:
PL> ----------------------------------
PL> master_name | detail_name | type |
PL> ----------------------------------
PL> M1 | M1, D1 | TA |
PL> M1 | M1, D2 | TB |
PL> M1 | M1, D3 | TA |
PL> M1 | M1, D4 | TC |
PL> M2 | M2, D1 | TC |
PL> M3 | M3, D1 | TA |
PL> M3 | M3, D2 | TA |
PL> M3 | M3, D3 | TB |
PL> M3 | M3, D4 | TA |
PL> M3 | M3, D5 | TB |
PL> M3 | M3, D6 | TC |
PL> M3 | M3, D7 | TC |
PL> ----------------------------------
PL> I need something like this:
PL> ----------------------------------------
PL> master_name | TA | TB | TC |
PL> ----------------------------------------
PL> M1 | M1, D1 | | |
PL> M1 | | M1, D2 | |
PL> M1 | M1, D3 | | |
PL> M1 | | | M1, D4 |
PL> M2 | | | M2, D1 |
PL> M3 | M3, D1 | | |
PL> M3 | M3, D2 | | |
PL> M3 | | M3, D3 | |
PL> M3 | M3, D4 | | |
PL> M3 | | M3, D5 | |
PL> M3 | | | M3, D6 |
PL> M3 | | | M3, D7 |
PL> ----------------------------------------
PL> Does anyone know how to do that in Postgresql? I run version 7.3.4.
PL> Thanks for any idea you might have.
PL> Philippe Lang
Maybe you can use the CASE construct.
select mastername, case when type='TA' then detail_name else '' end as ta, case .... as tb, case ... as ts from ...
I don't try this, but maybe...
DAQ
