More on JOINS
Subject:   Outer Joins With Oracle
Date:   2004-04-15 01:43:31
From:   juby
Response to: Outer Joins With Oracle

outer joins
Full Threads Oldest First

Showing messages 1 through 2 of 2.

  • Outer Joins With Oracle
    2005-04-25 04:02:07  oraguy [View]

    So what does this mean a join can become left or right if we interchange the positions of columns like
    p.partid(+)=s.partid (this is giving all unmatched rows of s table which is on right so this should be called as right outer join)

    By simply changing the positions, it becomes

    s.partid=p.partid(+) (this is also going to give all unmatched rows from s table but since the s table is on left side, so this will be left outer join)

    What i think is that, in oracle properietary joins using + operator, there is no concept of left and right outer join, an outer join is simply an outer join. the operator can be used only to get unmatched rows from a particular table.

    • Outer Joins With Oracle
      2005-10-05 03:41:55  outerjoins [View]

      I've used 2tables holding june month and august month data. In august month i've got (n+1) records whereas in june month n records. On using outer join for august and june month, i got same number of records as their corresponding tables.

      select a.* from aug a, jun b where b.ASST_NO=a.ASST_NO(+); -- getting jun table record count

      select a.* from aug a, jun b where b.ASST_NO(+)=a.ASST_NO; -- getting aug table record count