Answers for "explain trigger in sql"

sql trigger example

-- SQL Server (update my_table after update on my_table)
CREATE TRIGGER trigger_name ON my_table AFTER UPDATE AS
IF UPDATE (col_name)	-- Optional, for particular column
BEGIN
    UPDATE my_table SET my_col_date = getdate() FROM my_table 
END;
-- Oracle (insert into log table after update on my_table)
CREATE OR REPLACE TRIGGER trigger_name AFTER UPDATE ON my_table
FOR EACH ROW
BEGIN
    INSERT INTO my_log_table (LOG_DATE, ACTION) VALUES (SYSDATE, 'Changed');
END;

SQL Trigger

Syntax:
create trigger [trigger_name] 
[before | after]  
{insert | update | delete}  
on [table_name]  
[for each row]
as [print/select]
Example:
create trigger myDel
on tbl_pro
after delete
as
select * from tbl_product
print 'Record Deleted successfully!!!'