sql - Oracle (+) operator equal number -


i know (+) operator in query:

select     *     tbl_test t, tbl_test_2 t2    t.field (+) = t2.field;

but (+) operator in such query as:

select     *     tbl_test t    t.field (+) = 2;

i don't know...

can explain it?

i have example

    select * xxtest v_id    v_name  v_address 5   pricelist   349fdafd34m 7   pricelist   349fdafd34m 7   footer1 349fdafd34m 5   footer1 349fdafd34m 5   header1 349fdafd34m 7   header1 349fdafd34m      select * xxtest2 v_id    v_name  v_address 7   header1 349fdafd34m

query 01

    select *      xxtest aa, xxtest2 bb      aa.v_id = bb.v_id(+) , bb.v_id(+) = 7 v_id    v_name  v_address   v_id    v_name  v_address 7   pricelist   349fdafd34m 7   header1 349fdafd34m 7   footer1 349fdafd34m 7   header1 349fdafd34m 7   header1 349fdafd34m 7   header1 349fdafd34m 5   pricelist   349fdafd34m  -   -   -  5   footer1 349fdafd34m  -   -   -  5   header1 349fdafd34m  -   -   -

query 02

    select *      xxtest aa, xxtest2 bb      aa.v_id = bb.v_id(+) , bb.v_id = 7 v_id    v_name  v_address   v_id    v_name  v_address 7   pricelist   349fdafd34m 7   header1 349fdafd34m 7   footer1 349fdafd34m 7   header1 349fdafd34m 7   header1 349fdafd34m 7   header1 349fdafd34m

hope it's u.


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