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)
Published on 31-Dec-2019 12:08:54
