How to delete a single value from a MySQL table with duplicate records?

Use DELETE to delete records, but if you have multiple duplicate records, then limit the deletion using MySQL LIMIT as in the below syntax −

Syntax

delete from yourTableName where yourColumnName=yourValue limit 1;

Let us first create a table −

mysql> create table DemoTable
   -> (
   -> Amount int
   -> );
Query OK, 0 rows affected (1.38 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values(50);
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable values(100);
Query OK, 1 row affected (0.36 sec)
mysql> insert into DemoTable values(50);
Query OK, 1 row affected (0.59 sec)
mysql> insert into DemoTable values(70);
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable values(90);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable values(50);
Query OK, 1 row affected (0.23 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+--------+
| Amount |
+--------+
|     50 |
|    100 |
|     50 |
|     70 |
|     90 |
|     50 |
+--------+
6 rows in set (0.00 sec)

Here is the query to delete a single value from a table −

mysql> delete from DemoTable where Amount=50 limit 1;
Query OK, 1 row affected (0.39 sec)

Let us check the table records once again −

mysql> select *from DemoTable;

This will produce the following output −

+--------+
| Amount |
+--------+
|    100 |
|     50 |
|     70 |
|     90 |
|     50 |
+--------+
5 rows in set (0.00 sec)