Last index of a given substring in MySQL

Question

We can find the index of the first occurrence of a given substring in MySQL using the INSTR() function as follows.

SELECT instr(\'Have_a_good_da         


        

Answer 1

If you don't want the overhead of REVERSE use the following:

LEFT
(
   'Have_a_good_day', 
   LENGTH('Have_a_good_day') - LENGTH(SUBSTRING_INDEX('Have_a_good_day','_',-1))-1
)