On Wed, 2009-10-07 at 12:10 +0800, Kermit Mei wrote: > Hello, I have three tables like this: > > HomeDev(id,...,text) > ZPhDev(id,...,HomeDevId) > ZGroupItem(id,...,groupId,ZPhDevId) > > Now, I want to get the items like this: > > ZPhDev.id, and its corresponding HomeDev.text, the relation is like > this: > > 1. Get ZGroupItem.ZPhDevId When I know groupId > 2. Get ZPhDev.HomeDevId When ZPhDev.id = ZGroupItem.ZPhDevId > 3. Get HomeDev.text When ZPhDev.HomeDevId = HomeDev.id > > How can I do it in only one sql command? I wrote it like this, but it > can't run: > sqlite> SELECT ZGroupItem.ZPhDevId HomeDev.text FROM ZGroupItem > ...> INNER JOIN ZPhDev ON ZGroupItem.ZPhDevId = ZPhDev.id > ...> WHERE ZGroupItem.groupId = 1; > SQL error: near ".": syntax error
Now I had complished it: sqlite> SELECT ZPhDev.id,HomeDev.text FROM HomeDev ...> INNER JOIN ZPhDev ON ZPhDev.HomeDevId = HomeDev.id ...> INNER JOIN ZGroupItem ON ZPhDev.id = ZGroupItem.ZPhDevId ...> WHERE ZGroupItem.groupId=1; Thanks all the same;) Kemrit Mei _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
