PostgreSQL – RPAD Function
The rpad function in PostgreSQL database is used to right-pad a string with a specified character or a set of characters until the resulting string reaches a specified length. This function is often used to format strings to a fixed width.
Here’s the syntax for the rpad function:
rpad(input_string, length, pad_string)
input_stringis the original string that you want to pad.lengthis the total length of the resulting string after padding. If the input string is longer than this length, it will not be truncated.pad_stringis the character or string that will be used for padding on the right side of the input string.
The rpad function takes the input_string and adds pad_string characters to its right side until the resulting string is length characters long.
Here’s an example of how to use the rpad function:
SELECT rpad('42', 5, '0');
In this example, the rpad function is used to right-pad the string '42' with zeros ('0') until it reaches a length of 5 characters. The result of this query will be '42000'.
You can use rpad to format strings to a fixed length by adding padding characters to the right side.