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To verify that columns C2, C3, and C4 are all updated (with table t1 having an UPDATE trigger), follow the syntax with & 14.
( 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. INSERT INTO dbo.audit Employee Data (audit_log_type, audit_emp_id, audit_emp_bank Account Number, audit_emp_salary, audit_emp_SSN) SELECT ' NEW', ins.emp_id, ins.emp_bank Account Number, ins.emp_salary, ins.emp_SSN FROM inserted ins; END; GO /*Inserting a new employee does not cause the UPDATE trigger to fire.*/ INSERT INTO employee Data VALUES ( 101, ' USA-987-01', 23000, ' R-M53550M', N' Mendel', N' Roland', 32); GO /*Updating the employee record for employee number 101 to change the salary to 51000 causes the UPDATE trigger to fire and an audit trail to be produced.*/ UPDATE dbo.employee Data SET emp_salary = 51000 WHERE emp_id = 101; GO SELECT * FROM audit Employee Data; GO /*Updating the employee record for employee number 101 to change both the bank account number and social security number (SSN) causes the UPDATE trigger to fire and an audit trail to be produced.*/ UPDATE dbo.employee Data SET emp_bank Account Number = '133146A0', emp_SSN = ' R-M53550M' WHERE emp_id = 101; GO SELECT * FROM dbo.audit Employee Data; GO USE Adventure Works2012; GO IF OBJECT_ID (N' Person.u Contact2', N' TR') IS NOT NULL DROP TRIGGER Person.u Contact2; GO CREATE TRIGGER Person.u Contact2 ON Person.Person AFTER UPDATE AS IF ( (SUBSTRING(COLUMNS_UPDATED(),1,1) & 20 = 20) AND (SUBSTRING(COLUMNS_UPDATED(),2,1) & 1 = 1) ) PRINT ' Columns 3, 5 and 9 updated'; GO UPDATE Person. 00000 - "%s: invalid identifier"update ( select old. WORKEXTENSION; But I was getting following error, by the Im on 10g R2 SQL Error: ORA-00904: "NEW"."WORKEXTENSION": invalid identifier 00904.