Convert all the records in a MySQL table from uppercase to lowercase using UPDATE command along with LOWER() method.
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)