Something I had to do today was figure out how to find the `SUM`

of an array in PostgreSQL. I went through many different ways, but this seemed to be the best:

SELECT SUM(t) FROM UNNEST(ARRAY[1,2,3,4,5,6,7,8,9]) t;

If you know of a shorter or better way to do this for a variable size array please let me know in the comments section below. If it is better, I will post it and of course give you all the credit. 8)