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Implement MySQL trigger in the first table to insert records in the second table?
For this, the syntax is as follows −
DELIMITER // create trigger yourTriggerName before insert on yourTableName1 for each row begin insert into yourTableName2 values (yourValue1,yourValue2,...N); end ; // DELIMITER ;
Let us first create a table −
mysql> create table DemoTable1 ( StudentId int, StudentName varchar(40) ); Query OK, 0 rows affected (0.69 sec)
Here is the query to create second table −
mysql> create table DemoTable2( Id int, Name varchar(40) ); Query OK, 0 rows affected (0.61 sec)
Here is the query for trigger before insert −
mysql> DELIMITER // mysql> create trigger afterinserttrigger before insert on DemoTable1 for each row begin insert into DemoTable2 values (10,'Chris'); end ; // Query OK, 0 rows affected (0.13 sec) mysql> DELIMITER ;
Let us insert the record into first table −
mysql> insert into DemoTable1 values(1,'David'); Query OK, 1 row affected (0.21 sec)
Now you can display all records from the first table using select statement −
mysql> select *from DemoTable1;
This will produce the following output −
+-----------+-------------+ | StudentId | StudentName | +-----------+-------------+ | 1 | David | +-----------+-------------+ 1 row in set (0.00 sec)
Let us check the table records of second table −
mysql> select *from DemoTable2;
This will produce the following output −
+------+-------+ | Id | Name | +------+-------+ | 10 | Chris | +------+-------+ 1 row in set (0.00 sec)
Updated on: 09-Oct-2019
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