SQL Server function SCOPE_IDENTITY() is equivalent to LAST_INSERT_ID() in MySQL. The syntax is as follows:
SELECT LAST_INSERT_ID().
This will return the ID of the last inserted record.
Here I will create a table with a primary key column. Below is a demonstration of last_insert_id().
First, let us create two tables. The query to create the first table is as follows:
mysql> create table TestOnLastInsertIdDemo -> ( -> StudentId int NOT NULL AUTO_INCREMENT, -> PRIMARY KEY(StudentId) -> ); Query OK, 0 rows affected (0.95 sec)
Now create the second table. The query is as follows:
mysql> create table TestOnLastInsertIdDemo2 -> ( -> Id int NOT NULL AUTO_INCREMENT, -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (2.79 sec)
Use the insert command to insert some records into the table. The query is as follows:
mysql> insert into TestOnLastInsertIdDemo2 values(),(),(),(),(),(),(),(); Query OK, 8 rows affected (0.21 sec) Records: 8 Duplicates: 0 Warnings: 0
Now create a trigger on the table "TestOnLastInsertIdDemo2". The query to create the table is as follows:
mysql> delimiter // mysql> create trigger insertingTrigger after insert on TestOnLastInsertIdDemo -> for each row begin -> insert into TestOnLastInsertIdDemo2 values(); -> end; -> // Query OK, 0 rows affected (0.19 sec) mysql> delimiter ;
If you want to insert a record in the TestOnLastInsertIdDemo table, last_insert_id() returns 1. The query to insert records is as follows:
mysql> insert into TestOnLastInsertIdDemo values(); Query OK, 1 row affected (0.31 sec)
Use the function last_insert_id(). The query is as follows:
mysql> select last_insert_id();
Here is the output:
+------------------+ | last_insert_id() | +------------------+ | 1 | +------------------+ 1 row in set (0.00 sec)
In the above example output, it is giving 1 because last_insert_id() only uses the original table and not inside the trigger table.
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