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UPDATE column to append data into it in MySQL?
To achieve this, the following is the syntax.
UPDATE yourTableName set yourColumnName=concat(ifnull(yourColumnName,””),’anyValue1,anyValue2,anyValue);
To understand the above syntax, let us first create a table. The query to create a table is as follows -
mysql> create table AppendDataDemo -> ( -> StudentId int, -> StudentName varchar(100), -> StudentAge int -> ); Query OK, 0 rows affected (1.54 sec)
Insert some records in the table using insert command. The query is as follows.
mysql> insert into AppendDataDemo values(101,'John',23); Query OK, 1 row affected (0.24 sec) mysql> insert into AppendDataDemo values(102,null,24); Query OK, 1 row affected (0.74 sec) mysql> insert into AppendDataDemo values(103,'Mike',26); Query OK, 1 row affected (0.12 sec)
Display all records from the table using select statement. The query is as follows.
mysql> select *from AppendDataDemo;
The following is the output.
+-----------+-------------+------------+ | StudentId | StudentName | StudentAge | +-----------+-------------+------------+ | 101 | John | 23 | | 102 | NULL | 24 | | 103 | Mike | 26 | +-----------+-------------+------------+ 3 rows in set (0.00 sec)
The following is the query to update the column StudentName and append “Carol, Sam, Maria” to its data.
mysql> update AppendDataDemo set StudentName=concat(ifnull(StudentName,""), ' Carol,Sam,Maria'); Query OK, 3 rows affected (0.14 sec) Rows matched: 3 Changed: 3 Warnings: 0
Check the table records from the table using select statement. The query is as follows.
mysql> select *from AppendDataDemo;
The following is the output displaying appened data.
+-----------+----------------------+------------+ | StudentId | StudentName | StudentAge | +-----------+----------------------+------------+ | 101 | John Carol,Sam,Maria | 23 | | 102 | Carol,Sam,Maria | 24 | | 103 | Mike Carol,Sam,Maria | 26 | +-----------+----------------------+------------+ 3 rows in set (0.03 sec)
Updated on: 29-Jun-2020
1K+ Views
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