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How to find and replace string in MySQL database for a particular string only?
Use the replace() function to replace string in MySQL Database.
The syntax is as follows
UPDATE yourTableName SET yourColumnName=replace(yourColumnName,'yourExistingValue','yourNewValue') WHERE <yourCondition>>;
To understand the above syntax, let us create a table. The query to create a table is as follows
mysql> create table findAndReplaceDemo -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentFirstName varchar(20) -> ); Query OK, 0 rows affected (0.49 sec)
Insert some records in the table using insert command.
The query is as follows
mysql> insert into findAndReplaceDemo(StudentFirstName) values('Carol');
Query OK, 1 row affected (0.15 sec)
mysql> insert into findAndReplaceDemo(StudentFirstName) values('David');
Query OK, 1 row affected (0.15 sec)
mysql> insert into findAndReplaceDemo(StudentFirstName) values('Bob');
Query OK, 1 row affected (0.10 sec)
mysql> insert into findAndReplaceDemo(StudentFirstName) values('Sam');
Query OK, 1 row affected (0.11 sec)
mysql> insert into findAndReplaceDemo(StudentFirstName) values('Mike');
Query OK, 1 row affected (0.13 sec)
mysql> insert into findAndReplaceDemo(StudentFirstName) values('Maxwell');
Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement.
The query is as follows
mysql> select *from findAndReplaceDemo;
The following is the output
+----+------------------+ | Id | StudentFirstName | +----+------------------+ | 1 | Carol | | 2 | David | | 3 | Bob | | 4 | Sam | | 5 | Mike | | 6 | Maxwell | +----+------------------+ 6 rows in set (0.00 sec)
Here is the query to find and replace string in MySQL database for a particular string only
mysql> update findAndReplaceDemo -> set StudentFirstName=replace(StudentFirstName,'Maxwell','Chris') -> where StudentFirstName='Maxwell'; Query OK, 1 row affected (0.16 sec) Rows matched: 1 Changed: 1 Warnings: 0
Let us check the table records once again, the value 'Maxwell’ have been changed to ‘Chris.
The query is as follows
mysql> select *from findAndReplaceDemo;
The following is the output with updated value
+----+------------------+ | Id | StudentFirstName | +----+------------------+ | 1 | Carol | | 2 | David | | 3 | Bob | | 4 | Sam | | 5 | Mike | | 6 | Chris | +----+------------------+ 6 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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