QGIS: Use 'replace' expression for 2 characters in one field calculation
You need to use a nested replace() function such as
You can nest as many replace() as you want.
You can do both replacements using a single function call:
regex_replace, where you would look for the two characters of interest (inside square brackets):
or 2) the
map variant of
replace, where the map is a series of key-value, the key being the string being searched for and the value being the replacement string