带有 2 个分隔符的 SUBSTRING_INDEX

Question

I have 2 different types of item codes. It consist of 2 parts, [companycode]-[itemcode] . Below is the example:

A: 0888-DIA172966616 B: 0888-PMA516998-2200000M

I want to substring only the [itemcode] parts of it so I use

SUBSTRING_INDEX(ItemCode, '-', -1)

It works fine with the A item code DIA172966616 , but for the B, it gives me only the value from the second "-", so it's just 2200000M . How to get the full item code for the B?

Answer 1

SUBTRING_INDEX() is only useful if you want the first N or last N delimited strings, you can't use it directly for "all but first N".

Don't use SUBSTRING_INDEX() for this, use SUBSTR() and LOCATE()

SUBSTR(ItemCode, LOCATE('-', ItemCode)+1)

LOCATE(ItemCode, '-') returns the position of the first - , and SUBSTR() then returns everything after that. +1 makes it skip over the - as well.