PostgreSQL LOWER() Function

The PostgreSQL LOWER() function converts all characters of the given string to lowercase. Any symbol, space, or number in the string is ignored while applying this function. Only alphabet are converted.

Syntax

LOWER(string)

Parameters

string Required. Specify the string to convert to lowercase.

Return Value

Returns the string with all characters of the specified string to lowercase.

Example 1:

The example below shows the usage of LOWER() function.

SELECT LOWER('Learning SQL is FUN!');
Result: 'learning sql is fun!'

SELECT LOWER('  SQL Tutorial  ');
Result: '  sql tutorial  '

Example 2:

Consider a database table called Employee with the following records:

EmpID	Name	City	Age	Salary
1	John	London	25	3000
2	Marry	New York	24	2750
3	Jo	Paris	27	2800
4	Kim	Amsterdam	30	3100
5	Ramesh	New Delhi	28	3000
6	Huang	Beijing	28	2800

The query given below is used to convert of column City to lowercase.

SELECT *, LOWER(City) AS City_Lowercase FROM Employee;

The query will produce the following result:

EmpID	Name	City	Age	City_Lowercase
1	John	London	25	london
2	Marry	New York	24	new york
3	Jo	Paris	27	paris
4	Kim	Amsterdam	30	amsterdam
5	Ramesh	New Delhi	28	new delhi
6	Huang	Beijing	28	beijing

❮ PostgreSQL Functions