Start Sql updating one table from another

Sql updating one table from another

COMP_BLOOMBERG_CODE = xls01.col1), COMP_AMS_STOCK_BETA=( SELECT col19 FROM xls01 WHERE INVST_COMPANY. Nah, in definition portion we have c0 ref cursor; c1 c0; then somewhere I need to define a variable that holds the rowtype for that unknown yet ref cursor.

COMP_BLOOMBERG_CODE = xls01.col1), COMP_AMS_MARKET_CAP=( SELECT col11 FROM xls01 WHERE INVST_COMPANY. An outer join of A to (nothing) might return nothing.

COMP_BLOOMBERG_CODE = xls01.col1), COMP_AMS_6MTH_AVG_TRDNG_VOL=( SELECT col9 FROM xls01 WHERE INVST_COMPANY. from t where t.column = 5( ); you need to outer join to a "set" - an outer join of A to B returns every row in B at least once.

COMP_BLOOMBERG_CODE = xls01.col1), COMP_AMS_52_WKS_L_PR_DT=( SELECT COL8 FROM xls01 WHERE INVST_COMPANY. outer joins don't work the way you think - your update "select" portion is just like: select ...

COMP_BLOOMBERG_CODE = xls01.col1), COMP_AMS_52_WKS_L_PRIC=( SELECT COL7 FROM xls01 WHERE INVST_COMPANY. I think - based on your failed code snippet - that you wanted to update emp and set it equal to test1.desc1 if there was a matching record in test1, otherwise - default it to ename/job in the emp table.

Hi Tom, Due to migration to new system we have to change all our account numbers. June 28, 2005 - pm UTC yes, the predicate in the join for the fictional question without a sample table and data was wrong (everytime I wing it, try to answer WITHOUT TESTING, it comes out wrong. test cases are relevant :) Hi Tom, Thanks for answering my question.

( Client number is consist of branch, Number, Sub Number Currency Code ) We have one big transaction table around 1 million records, having many columns, and at many places client numbers are stored from account master under various columns 1. You told me to use update ( select old.old_account_number, new.new_account_number from old_table old, mapping_table new where old.old_account_number = new.old_account_number ) set old_account_number = new_account_number; But I think my questions still reamin unanswered 1. In your answer only one number say client number will get updated.

I use this statement: update table1 set col1 = col2 col3 where col4 = 'OK' and exists (select distinct 1 from table2 where table1.col_x = table2.col_x2 and table2.col_y2 = 'super OK') This update works, but is too slow... September 26, 2008 - pm UTC you can use merge merge into t1 using t2 on (t1.x = t2.a) when matched then update set y = t2.b; if there exist duplicated by t2.a (more than one row with t2.a having the same value), the merge will fail at runtime when it encounters you trying to modify Y in a non-deterministic fashion. Can we use the WHERE clause in the merge statement?

Here you want to set a qty to a constant for some records - and you 'anti-join' to the other table, not join. create table types 2 (type varchar2(1), 3 description varchar2(50), 4 factor number(4)); ************************************************************************ Insert table: insert into types values ('A','Monthly','12') / insert into types values ('B','HOURLY','1796') / insert into types values ('G','Daily','224') / insert into types values ('H','Per Visit','') / insert into types values ('I','Per session','') / ******************************************************************** insert into class_test values ('0001','3,281.18','4,177.64') / insert into class_test values ('0002','3,779.27','4,820.00') / insert into class_test values ('0003','4,779.27','5,820.00') / insert into class_test values ('0004','5,779.27','6,820.00') / insert into class_test values ('0005','7,311.45,'10,402.64') / insert into class_test values ('0005','','20.83') / insert into class_test values ('0006','','14,528.60') / insert into class_test values ('0007','5,001.82','5,727.91') / ****************************************************************** insert into jobs values ('0001','CSI','A','','50131.68') / insert into jobs values ('0002','TTI','A','','200') / insert into jobs values ('0003','SSP','A','','') / insert into jobs values ('0004','CCC','A','','') / insert into jobs values ('0006','CIO','A','','') / insert into jobs values ('0007','CIO','A','','') / It should be update rows in JOBS table where rate_type = 'A', and ITEM_NO of JOBS table should be match with ITEM_NO of class_test table. Name Marital Status Mobile Phone Email I want to update table A (Name and Marital Status) using table B data, considering that ID matches in both tables, and using a designated ID (the use of Id may be optional, but for sake of simplicity lets assume we only want to update 1 row, but multiple columns at same time) Update table A set table A. Interestingly the Update that is suggested by you takes 12 hours and Update using the PL/SQL cursor style takes 8 hrs consistently on the live environment! thanks in advance June 04, 2008 - pm UTC create table has to be followed by indexing, grants, constraints and everything else - have you accounted for THAT. Unfortunately i cant get the tkprof as i dont have access to. if you were asked to pilot a plane with a blindfold on - how well do you think you would do. I cannot tell you how to make something more efficient if I do not know what is impeding the efficiency in the first place.

I don't think i can use the merge statement here since there are more than 1 condition that has to be met for the target table to be updated.

The way i understand it external tables don't have primary keys.

etc I have a mapping table where "ALL" old account number and new account numbers are present.