PostgreSQL LOWER() function
The PostgreSQL lower function is used to convert a string from upper case to lower case.
|string||A string whose characters are going to be converted to lowercase.|
PostgreSQL Version: 9.3
Example: PostgreSQL LOWER() function
The following PostgreSQL statement returns the given string after converting all of its characters in lowercase.
SELECT lower('W3RESOURCE') AS "Upper to Lower";
Upper to Lower ---------------- w3resource (1 row)
Example of LOWER() on column of a table :
Sample Table: employees.
If we want to display the first name, last name, email and the lower of email of those employees who belong to the dept 20 from the employee table, the following SQL can be executed:
SELECT first_name,last_name, email,LOWER(email) FROM employees WHERE department_id=20;
first_name | last_name | email | lower ------------+-----------+----------+---------- Michael | Hartstein | MHARTSTE | mhartste Pat | Fay | PFAY | pfay (2 rows)