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MySQL increment a database field by 1?
You can increment a database using update command. The syntax is as follows −
UPDATE yourTableName set yourColumnName=yourColumnName+1 where condition;
To understand the above syntax, let us first create a table. The query to create a table is as follows −
mysql> create table IncrementBy1 -> ( -> Id int, -> Name varchar(100), -> CounterLogin int -> ); Query OK, 0 rows affected (0.63 sec)
Insert some records using insert command. The query to insert records in the table is as follows −
mysql> insert into IncrementBy1 values(100,'John',30); Query OK, 1 row affected (0.17 sec) mysql> insert into IncrementBy1 values(101,'Carol',50); Query OK, 1 row affected (0.15 sec) mysql> insert into IncrementBy1 values(102,'Bob',89); Query OK, 1 row affected (0.25 sec) mysql> insert into IncrementBy1 values(103,'Mike',99); Query OK, 1 row affected (0.18 sec) mysql> insert into IncrementBy1 values(104,'Sam',199); Query OK, 1 row affected (0.36 sec) mysql> insert into IncrementBy1 values(105,'Tom',999); Query OK, 1 row affected (0.18 sec)
Display all records from the table using select statement. The query is as follows −
mysql> select *from IncrementBy1;
Output
+------+-------+--------------+ | Id | Name | CounterLogin | +------+-------+--------------+ | 100 | John | 30 | | 101 | Carol | 50 | | 102 | Bob | 89 | | 103 | Mike | 99 | | 104 | Sam | 199 | | 105 | Tom | 999 | +------+-------+--------------+ 6 rows in set (0.00 sec)
Here is the query that increments the database field by 1 −
mysql> update IncrementBy1 -> set CounterLogin=CounterLogin+1 -> where Id=105; Query OK, 1 row affected (0.45 sec) Rows matched: 1 Changed: 1 Warnings: 0
Now you can check the particular record is incremented or not. The value 999 has been incremented with 1 since we are incrementing the value where Id=105 as shown above.
The following is the query to check the record −
mysql> select *from IncrementBy1 where Id=105;
Output
+------+------+--------------+ | Id | Name | CounterLogin | +------+------+--------------+ | 105 | Tom | 1 000 | +------+------+--------------+ 1 row in set (0.00 sec)
Updated on: 30-Jul-2019
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