Re: Multiple tables query on Mapserver

On Feb 2, 2012, at 0:16, tiplip <chengwei02(at)gmail(dot)com> wrote:

> Hi all,
>
> I have a couple of tables with same structure but standing for different
> layers(1,2,3...) respectivle for Mapserver,
>
> table1
> gid | id | name | address | post code | layer
> | geom
> -----------+------+----------+-------------+-----------+--------+------------
> 1 1 'name11' 'address11' 102356 1
> geom11
> 2 2 'name12' 'address12' 102356 1
> geom12
> - - 'name1-' 'address1-' 102356
> 1 geom1-
>
> table2
> gid | id | name | address | post code | layer
> | geom
> -----------+------+----------+-------------+-----------+--------+------------
> 1 1 'name21' 'address21' 102356 2
> geom21
> 2 2 'name22' 'address22' 102356 2
> geom22
> - - 'name2-' 'address2-' 102356 2
> geom2-
>
>
> table3
> gid | id | name | address | post code | layer
> | geom
> -----------+------+----------+-------------+-----------+--------+------------
> 1 1 'name31' 'address31' 102356 3
> geom31
> 2 2 'name32' 'address32' 102356 3
> geom32
> - - 'name3-' 'address3-' 102356
> 3 geom3-
>
>
> I want to get query results from table1, 2, 3... if key word matches, say
> name like 'name' as follows:
>
> input 'name', results will be like
>
> table2
> gid | id | name | address | post code | layer
> | geom
> -----------+------+----------+-------------+-----------+---------+------------
> 1 1 'name11' 'address11' 102356 1
> geom11
> 2 2 'name12' 'address12' 102356 1
> geom12
> 3 3 'name21' 'address21' 102356 2
> geom21
> 4 4 'name22' 'address22' 102356 2
> geom22
> 5 5 'name31' 'address31' 102356 3
> geom31
> 6 6 'name32' 'address32' 102356 3
> geom32
> - - --------- --------- ------- -
> -
>
>
> can I achieve that results with a single query sentence? and how?
> any good ideas will be appricated?
>
> thanks
>
>

The general method is to use "UNION" but not sure about the changing of the gid and id values...

David J.