On Thursday 14 August 2003 16:40, Slawek Jarosz wrote: > Hi, > > I trying to write a query that will join 2 tables. Here's the concept: > Table 1: table1, primary key pk1 > Table 2: table2, primary key pk2 > > One of the fields (f2) in table2 contains either the primary key of table1 > or a NULL value. So normally a pretty basic query: > > SELECT table1.*, table2.pk2 FROM table1, table2 WHERE table2.f2 = > table1.pk1; > > BUT what I would like to do is show all records of Table 1 even if there is > no match in Table 2. Meaning that the reults could be table1... > table2.pk2 > table1... NULL > > Doable?
You need an OUTER JOIN, see e.g. http://www.postgresql.org/docs/7.3/static/tutorial-join.html Ian Barwick [EMAIL PROTECTED] ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
