query to remove all characters after last comma in string

Question

i have a mysql table with this sort of data

TACOMA, Washington, 98477

Now i have thousands of such rows. I want the data to be manipulated

Answer 1

substring_index(col, ',',-1)

will give the string from last index of comma to end of string

replace(col,concat(',',substring_index(col, ',',-1)),'')