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How to update a column with the same values (not all) using UPDATE, SET and LIMIT in MySQL?
Let us first create a table −
mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.69 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(Name) values('Carol');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable(Name) values('Chris');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(Name) values('David');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable(Name) values('Bob');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable(Name) values('Mike');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable(Name) values('Sam');
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable(Name) values('Robert');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(Name) values('Adam');
Query OK, 1 row affected (0.18 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
+----+--------+ | Id | Name | +----+--------+ | 1 | Carol | | 2 | Chris | | 3 | David | | 4 | Bob | | 5 | Mike | | 6 | Sam | | 7 | Robert | | 8 | Adam | +----+--------+ 8 rows in set (0.00 sec)
Here is the query to update the table and set a column with the same values, except the last column value −
mysql> update DemoTable -> set Name="John" -> limit 7; Query OK, 7 rows affected (0.20 sec) Rows matched: 7 Changed: 7 Warnings: 0
Let us check the table records once again.
mysql> select *from DemoTable;
Output
+----+------+ | Id | Name | +----+------+ | 1 | John | | 2 | John | | 3 | John | | 4 | John | | 5 | John | | 6 | John | | 7 | John | | 8 | Adam | +----+------+ 8 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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