MySQL:

RPAD

Syntax:
RPAD(str,len,padstr)

Returns the string str, right-padded with the string padstr to a length
of len characters. If str is longer than len, the return value is
shortened to len characters.

URL: https://dev.mysql.com/doc/refman/8.0/en/string-functions.html

Example

mysql> SELECT RPAD('hi',5,'?');
-> 'hi???'
mysql> SELECT RPAD('hi',1,'?');
-> 'h'

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