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Update MySQL table on INSERT command with triggers?
Let us first create a table −
mysql> create table DemoTable1 -> ( -> Id int, -> FirstName varchar(20) -> ); Query OK, 0 rows affected (0.52 sec)
Here is the query to create second table −
mysql> create table DemoTable2 -> ( -> EmployeeId int, -> EmployeeName varchar(20) -> ); Query OK, 0 rows affected (0.51 sec)
Let us now create a trigger to update MySQL table on insert command −
mysql> DELIMITER // mysql> CREATE TRIGGER updateDemoOnInsert -> AFTER INSERT ON DemoTable2 -> FOR EACH ROW BEGIN -> insert into DemoTable1 values(110,'Adam'); -> END -> // Query OK, 0 rows affected (0.14 sec) mysql> DELIMITER ;
Insert some records in the table using insert command −
mysql> insert into DemoTable2 values(101,'Mike'); Query OK, 1 row affected (0.22 sec)
Display all records from the second table using select statement −
mysql> select * from DemoTable2;
This will produce the following output −
+------------+--------------+ | EmployeeId | EmployeeName | +------------+--------------+ | 101 | Mike | +------------+--------------+ 1 row in set (0.00 sec)
Display all records from the first table using select statement −
mysql> select * from DemoTable1;
This will produce the following output −
+------+-----------+ | Id | FirstName | +------+-----------+ | 110 | Adam | +------+-----------+ 1 row in set (0.00 sec)
Updated on: 12-Dec-2019
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