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Set a specific value for the first three column values in MySQL?
To set a specific value for only 1st three values, you need to use LIMIT 3. Let us first create a table −
mysql> create table DemoTable1968 ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(20) ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1968(Name) values('Chris');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1968(Name) values('David');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1968(Name) values('Sam');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1968(Name) values('Mike');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1968(Name) values('Carol');
Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −
mysql> select * from DemoTable1968;
This will produce the following output −
+----+-------+ | Id | Name | +----+-------+ | 1 | Chris | | 2 | David | | 3 | Sam | | 4 | Mike | | 5 | Carol | +----+-------+ 5 rows in set (0.00 sec)
Here is the query to set a specific value for the first three column values −
mysql> update DemoTable1968 set Name='Robert' order by Id limit 3; Query OK, 3 rows affected (0.00 sec) Rows matched: 3 Changed: 3 Warnings: 0
Let us check the table records once again:
mysql> select * from DemoTable1968;
This will produce the following output −
+----+--------+ | Id | Name | +----+--------+ | 1 | Robert | | 2 | Robert | | 3 | Robert | | 4 | Mike | | 5 | Carol | +----+--------+ 5 rows in set (0.00 sec)
Updated on: 31-Dec-2019
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