On Feb 2, 2012, at 0:16, tiplip <chengwe...@gmail.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. -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
