How do I change the case on every field in a MySQL table in a single call?

You can use update along with lower() function for this. Let us first create a table −

mysql> create table DemoTable (    Id varchar(100),    StudentFirstName varchar(20),    StudentLastName varchar(20),    StudentCountryName varchar(10) ); Query OK, 0 rows affected (0.61 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values('STU-101','John','Smith','US'); Query OK, 1 row affected (0.59 sec) mysql> insert into DemoTable values('STU-102','John','Doe','UK'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('STU-103','David','Miller','AUS'); Query OK, 1 row affected (0.19 sec)

Following is the query to display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+---------+------------------+-----------------+--------------------+ | Id      | StudentFirstName | StudentLastName | StudentCountryName | +---------+------------------+-----------------+--------------------+ | STU-101 | John             | Smith           | US | | STU-102 | John             | Doe           | UK | | STU-103 | David | Miller   | AUS | +---------+------------------+-----------------+--------------------+ 3 rows in set (0.00 sec)

Here is the query to change the case on every field in a MySQL table in a single call.

mysql> update DemoTable    set Id=lower(Id),    StudentFirstName=lower(StudentFirstName),   StudentLastName=lower(StudentLastName),   StudentCountryName=lower(StudentCountryName); Query OK, 3 rows affected (0.22 sec) Rows matched : 3 Changed : 3 Warnings : 0

Display all records from the table using select statement to check the changes done in the above query −

mysql> select *from DemoTable;

This will produce the following output −

+---------+------------------+-----------------+--------------------+ | Id      | StudentFirstName | StudentLastName | StudentCountryName | +---------+------------------+-----------------+--------------------+ | stu-101 | john             | smith | us | | stu-102 | john           | doe | uk | | stu-103 | david | miller | aus | +---------+------------------+-----------------+--------------------+ 3 rows in set (0.00 sec)