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How to set different auto-increment ids for two tables with a user-defined variable?
For this, you can use LAST_INSERT_ID(). Let us first create a table. Here, we have set the auto_increment id to StudentId column −
mysql> create table DemoTable1 (StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY); Query OK, 0 rows affected (0.58 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1 values(null); Query OK, 1 row affected (0.18 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable1;
This will produce the following output −
+-----------+ | StudentId | +-----------+ | 1 | +-----------+ 1 row in set (0.00 sec)
Following is the query to get last insert id. We have set it in a user-defined variable −
mysql> set @studentId=last_insert_id(); Query OK, 0 rows affected (0.00 sec)
Following is the query to create second table −
mysql> create table DemoTable2 (Id int); Query OK, 0 rows affected (0.61 sec)
Following is the query to set different auto-increment ids for two tables −
mysql> insert into DemoTable2 values(@studentId+1); Query OK, 1 row affected (0.13 sec)
Display all records from the table with the help of select statement −
mysql> select *from DemoTable2;
This will produce the following output −
+------+ | Id | +------+ | 2 | +------+ 1 row in set (0.00 sec)
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