Reversing a String using a PostgreSQL Function
Function to Reverse a String
Write a PostgreSQL function to reverse a given string.
Solution:
-- Create a function named reverse_string that takes a text input and returns a text value
CREATE FUNCTION reverse_string(str TEXT) RETURNS TEXT AS $$
BEGIN
-- Return the reversed version of the input string using the REVERSE function
RETURN REVERSE(str);
END;
-- Specify the language used in the function as PL/pgSQL
$$ LANGUAGE plpgsql;
Explanation:
- Purpose of the Query:
- Returns the reversed form of a string.
- Real-World Application:
- Useful in data validation, cryptography, and text processing.
For more Practice: Solve these Related Problems:
- Write a PostgreSQL function that checks if a given string is a palindrome.
- Write a PostgreSQL function that removes all vowels from a given string.
- Write a PostgreSQL function that returns only the first half of a given string.
- Write a PostgreSQL function that converts a string into Title Case (capitalizing the first letter of each word).
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