How to update record of another table in oracle?

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<br />
SQL> desc t1<br />
 Name         Null?    Type<br />
 -------------------------------<br />
 NO          NOT NULL NUMBER(38)<br />
 TID                  NUMBER(38)<br />
<br />
SQL> desc t2<br />
 Name          Null?    Type<br />
 ----------------------------------<br />
 TID           NOT NULL NUMBER(38)<br />
 NM                     CHAR(10)<br />
 NUM                    NUMBER(38)<br />
<br />
SQL> update t1,t2                         <br />
  2  SET t2.num=220333<br />
  3  where t1.tid=t2.tid<br />
  4  and t1.no=1<br />
  5  ;<br />

update t1,t2
*
ERROR at line 1:
ORA-00971: missing SET keyword

I want to update <num> column of t2 but using <no> column of table t1.

Posted 12-Feb-13 22:44pm

surkhi

Updated 12-Feb-13 22:46pm

v2

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Jörgen Andersson · Accepted Answer · 2013-02-13T10:52:00

Solution 1

Try:

SQL

UPDATE  t2
SET     t2.num = 220333
WHERE   EXISTS(
    SELECT  1
    FROM    t1
    WHERE   t1.tid=t2.tid
    AND     t1.no=1
    )

Posted 13-Feb-13 10:52am

Jörgen Andersson

Comments

surkhi 14-Feb-13 0:37am

Thanx for it...
So,I have to select the row number to which I want to modify in select statement(select 1,select 2,select3........)
right???

Jörgen Andersson 14-Feb-13 2:18am

No, the constant is only so that a row gets selected for the EXISTS clause. For an EXISTS to work you can select anything.
http://www.techonthenet.com/sql/exists.php
I prefer to select a constant instead of the standard * because I've been told it uses less memory. ~~I have never controlled that statement though~~. Have checked it now, it doesn't matter, you can select whatever you want.