ektron updating search catalogs - Trigger updating another table

Therefore, the first two statements in the trigger should look like it is shown below. Data2(Col int not null) go create trigger trg_Data_AI on dbo.

Data2 after insert as select 'After Insert' as [Trigger] ,@@Row Count as [Row Count] ,(select count(*) from inserted) as [Inserted Cnt] ,(select count(*) from deleted) as [Deleted Cnt] go create trigger trg_Data_AU on dbo.

Too many times we see cursors going row-by-row through these tables when a set based operation would have been better.

trigger updating another table-24

CREATE OR REPLACE TRIGGER trg_log_employee_salary AFTER UPDATE OF SALARY ON employee_salary FOR EACH ROW DECLARE username varchar2(20); BEGIN -- get current login user SELECT USER INTO username FROM dual; -- Insert new values into log table. INSERT INTO employee_salary_hike_log VALUES ( : NEW. He have good understanding and knowledge of Java, Database, Spring, Hibernate and exploring other technologies related to Software development.

SALARY, sysdate, username); END; INSERT INTO employee_salary VALUES (101,15000,'Pranav'); INSERT INTO employee_salary VALUES (201,40000,'Vikram'); INSERT INTO employee_salary VALUES (301,35000,'Nikhil'); -- fire trigger, insert into log table UPDATE employee_salary SET SALARY = '28000' WHERE emp_id = 101; -- fire trigger, insert into log table UPDATE employee_salary SET SALARY = '43000' WHERE emp_id = 301; 50000) DECLARE username varchar2(20); BEGIN SELECT USER INTO username FROM dual; -- Insert new values into log table. He is working in a well reputed MNC as an applications Developer with 5 years of experience.

While this isn't what actually happens, it helps visualize what the tables contain and is useful in that sense.

Let's see an example of the triggers in operation with these tables. Now there is a catch you should be aware of with AFTER triggers (the default type of trigger unless you manually specify that's an INSTEAD OF trigger).

triggers introduce fragmentation and increase tempdb load due to version store usage.

Triggers are running in context of transaction, increase the time in which locks are held and contribute to locking and blocking in the system.

Data2 after update as select 'After Update' as [Trigger] ,@@Row Count as [Row Count] ,(select count(*) from inserted) as [Inserted Cnt] ,(select count(*) from deleted) as [Deleted Cnt] go create trigger trg_Data_AD on dbo.

Data2 after delete as select 'After Delete' as [Trigger] ,@@Row Count as [Row Count] ,(select count(*) from inserted) as [Inserted Cnt] ,(select count(*) from deleted) as [Deleted Cnt] gomerge into dbo.

Without that SQL Server returns affected number of rows for each operator in the trigger in addition to original DML statement.

Some client libraries rely on the single message in the output and would not work correctly in case of multiple messages.

SALARY ,sysdate, username); END; 50000, fire after update trigger, insert into log UPDATE employee_salary SET SALARY = '70000' WHERE emp_id = 101; UPDATE employee_salary SET SALARY = '100000' WHERE emp_id = 301; -- new salary - old salary Dhaval Dadhaniya is a software engineer by profession and reader/writter by passion.

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