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Add data to existing data in a MySQL Database?
You can use CONCAT() function for this. Let us first create a table −
mysql> create table DemoTable ( UserId int NOT NULL AUTO_INCREMENT PRIMARY KEY, UserName varchar(100) ); Query OK, 0 rows affected (0.43 sec)
Insert records in the table using insert command −
mysql> insert into DemoTable(UserName) values('John');
Query OK, 1 row affected (0.24 sec)
mysql> insert into DemoTable(UserName) values('Chris');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable(UserName) values('Robert');
Query OK, 1 row affected (0.11 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+--------+----------+ | UserId | UserName | +--------+----------+ | 1 | John | | 2 | Chris | | 3 | Robert | +--------+----------+ 3 rows in set (0.00 sec)
Here is the query to add data to existing data in MySQL database. The UserId 1 is concatenated with the name “Smith” to the already existed name−
mysql> update DemoTable set UserName=concat(UserName,' Smith') where UserId=1; Query OK, 1 row affected (0.12 sec) Rows matched: 1 Changed: 1 Warnings: 0
Let us check the table records once again −
mysql> select *from DemoTable;
This will produce the following output −
+--------+------------+ | UserId | UserName | +--------+------------+ | 1 | John Smith | | 2 | Chris | | 3 | Robert | +--------+------------+ 3 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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