User defined function in PostgreSQL/ SQL 14# || SQL Query Example || Vaseem Analyst
🔍 Want to level up your PostgreSQL skills? In this video, we dive into writing a powerful SQL function to fetch user details based on ID! Whether you're a beginner or an experienced developer, this tutorial will help you understand how to create, use, and drop functions in PostgreSQL effectively.
💡 What You'll Learn:
✅ How to create a PostgreSQL function using PL/pgSQL
✅ Fetch specific user details dynamically using RETURN QUERY
✅ Execute & drop SQL functions for database optimization
🎯 Code Used in the Video:
sql
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CREATE OR REPLACE FUNCTION get_name(ids INT)
RETURNS TABLE(
name VARCHAR,
city VARCHAR,
salary INT
)
AS $$
BEGIN
RETURN QUERY
SELECT u.name, u.city, u.salary FROM users AS u
WHERE u.id = ids;
END;
$$ LANGUAGE plpgsql;
SELECT * FROM get_name(102);
DROP FUNCTION get_name;
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