Deleting the nth row in MySQL?

To delete nth row in MySQL, use DELETE statement and work with subquery. Let us first create a table:

mysql> create table DemoTable1
   -> (
   -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> StudentName varchar(100)
   -> );
Query OK, 0 rows affected (0.99 sec)

Following is the query to insert some records in the table using insert command:

mysql> insert into DemoTable1(StudentName) values('Larry');
Query OK, 1 row affected (0.14 sec)

mysql> insert into DemoTable1(StudentName) values('Sam');
Query OK, 1 row affected (0.13 sec)

mysql> insert into DemoTable1(StudentName) values('Mike');
Query OK, 1 row affected (0.18 sec)

mysql> insert into DemoTable1(StudentName) values('Carol');
Query OK, 1 row affected (0.12 sec)

mysql> insert into DemoTable1(StudentName) values('David');
Query OK, 1 row affected (0.16 sec)

mysql> insert into DemoTable1(StudentName) values('Bob');
Query OK, 1 row affected (0.13 sec)

Following is the query to display records from the table using select command:

mysql> select * from DemoTable1;

This will produce the following output

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
| 1         | Larry       |
| 2         | Sam         |
| 3         | Mike        |
| 4         | Carol       |
| 5         | David       |
| 6         | Bob         |
+-----------+-------------+
6 rows in set (0.00 sec)

Following is the query to delete nth row:

mysql> delete from DemoTable1 where StudentId = (select StudentId from (select StudentId from DemoTable1 order by StudentId limit 1,1) as tbl);
Query OK, 1 row affected (0.19 sec)

Display all records from the table to check the record has been deleted or not:

mysql> select * from DemoTable1;

This will produce the following output. Record 2^nd is deleted now:

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
| 1         | Larry       |
| 3         | Mike        |
| 4         | Carol       |
| 5         | David       |
| 6         | Bob         |
+-----------+-------------+
5 rows in set (0.00 sec)

Rama Giri

Published on 17-Apr-2019 11:25:07

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