Q:

MySQL Second (or third) Index Of in String

What would be the simplest way to locate the index of the third space in a string. 
My goal is to get CCC out of this space separated list: AAAA BBBB CCCC DDDD EEE.  where A and B and D are fixed length, and C is variable length, E F G are optional. 
In Java I would use indexof, with a starting point of 10 and that would get me the third space, but it seems that I cannot do that in MySQL, so I thought maybe I could find a 'third index of' function? 

A:

You would want to use SUBSTRING_INDEX function like this
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(field, ' ', 3), ' ', -1)
FROM table

The inner function call would get you to AAAA BBBB CCCC while the outer function call would pare that down to just CCCC. 

A:

You could use SUBSTRING_INDEX.