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

You can use :

SELECT SUBSTRING_INDEX('TACOMA, Washington, 98477', ',', 2)

You can read more here.

And the update statement :

UPDATE my_table
    SET my_col = SUBSTRING_INDEX(my_col, ',', 2)

Where you need to replace my_table with your table name and my_col with the column you need to be updated.

Answer 2

substring_index(col, ',',-1)

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

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

Answer 3

Possibly this way. Count the number of commas (by checking the length against the length with all the commas removed) and then use SUBSTRING_INDEX to get the string up to the number of commas:-

SELECT SUBSTRING_INDEX(col, ',', LENGTH(col) - LENGTH(REPLACE(col, ',', '')))
FROM SomeTable