Updating multiple columns in oracle best cheapest dating sites
Tom, No one was using the system when I ran the INSERT . But once the database was bounced th inserts went without problem. Thanks April 30, 2002 - am UTC I think there was another user or two on the system personally.
They may not have been active but they would be enough to jam the RBS if they started a transaction and left it there. In what version of Oracle did the "update a join" syntax become available?
The following example specifies how to update multiple columns in a table.
In this example, two columns supplier_name and supplier_address is updated by a single statement.
The where exists causes us to ONLY UPDATE rows that have a mate in LOOKUP. My question is on this point which is from one of your replies. update name 2 set column Name = ( select value 3 from lookup 4 where lookup.keyname = name.keyname 5 and other Column = :other_value ) 6 where exists ( select value 7 from lookup 8 where lookup.keyname = name.keyname 9 and other Column = :other_value ) 10 / 1 row updated. they will perform differently based on the optimizer you use, the validity of the statistics, and so on.
It would break up the update by partitions on T, full scanning each partition on T and joining it to T1 after down selecting the full scans with the predicate on upper(t.object_name). LOCALHOST Tom the original question was for a 7.3.4 datbase. If I choose to use the second method that use suggest. January 11, 2003 - pm UTC the 904 happened because the above query quite simply doesn't reference PCDB_USER_C anywhere in a from clause.
One way to find out -- run it, then try to select * from t where rownum = 1; If that succeeds, no parallal update, otherwise if that fails, parallel update happened. sigh, such a simple simple example -- you spec'ed it all out -- and yet, you didn't try??? the answer is yes, as long as the rules for "key preserved" are satisified -- that is -- each row in A will appear AT MOST ONCE in the resulting join. Do I still need the WHERE EXISTS qualification for this version ? PCUS_USER_RN Returns ORA-00904 error I would just like to say how much this site is helping an Oracle novice such as my good self! It is as if that table didn't exist you need to reference the table at some point and you didn't.
d) you already have a logic error, c1%rowcount isn't "cumulative", its the number of rows updated by the last update. Tom , of the above two which one is better performance wise? In general, if "NAME" was very very small and "LOOKUP" was very very large (yet indexed on keyname/othercolumn/value) -- the where exists would be very safe. After implementing this in my code, I 'm getting the following error ERROR at line 61: ORA-01779: cannot modify a column which maps to a non key-preserved table. In my query , I use this for batch update which cannot have a condition like pk = XXX.
Unless you actually update 50,000 rows in one update, you'll never commit (you have a bug) I thought only SQL%ROWCOUNT was the one which was set during a transaction statement. c1%rowcount is maintained -- it is the number of rows fetched so far (i use explicit cursor soooo infrequently, I slipped up on that one) ..I can't get it to work. Not entirely sure why I was getting it in the first place. The update of a join is generally the choice you want to go with. I look for some status in the table and want to update all matching status conditions. (as in sub queries with set and in where clause, I have to join lot of tables say eg:10 and with same conditions). Can you guide me in achieving what I am trying Updating a master table 2 or more columns from a child table that has one has a composite key as the primary key example Table: Food (food_id number primary key food_name varchar2(100) calorie number fibre number total_fat number ) Sample data for Food Food_id food_name calorie fibre total_fat 1 apple null null null 2 beer null null null Table: Food_Portion (food_id number portion_id number qty number weight number calorie number fibre number total_fat number ) where food_id portion_id is primary key Sample data for Food_Portion Food_id Portion_ID qty weight calorie fibre total_fat 1 1 1 10 10 3 3 1 2 2 15 20 5 2 1 3 100 100 60 10 9 2 1 1 10 5 0 0 2 2 .5 6 4 0 0 2 3 100 100 40 0 10 The update should set the calorie, fibre and total_fat in food_table to the values in food_portion table where the food_= 100 and food_portion.weight = 100 There rule is there will be only one row per food_id in the food_portion table with qty = 100 and weight = 100 ( that is, select food_id from food_portion where qty = 100 and weight = 100 will give exactly one row per food_id) I ran this type of update update ( select a1, b1 from a, b where = ) set a1 = b1 (this one I havent tried) But It gave me the ORA-01779: cannot modify a column which maps to a non key-preserved table error Then I tried the update t set ( f1, f2, f3 ) = ( select a, b, c from t2 where t2.some_field = t.some_field ) where exists ( select a, b, c from t2 where t2.some_field = t.some_field ) update a set a1 = ( select b1 from b where = ) where in ( select id from b ) both of them gave me the ORA-01427: single-row subquery returns more than one row Error My question is what is my option other than PL/SQL for this kind of update?
Search for updating multiple columns in oracle:
column_n: It specifies the columns that you want to update. 3) conditions: It specifies the conditions that must be fulfilled for execution of UPDATE stateme.