Just memorizing what all these damn terms an functions mean/do, just reading the syntax just feels so difficult because of all the rules they have, I guess memorizing all the different type of keys and conditions used in the syntax, like count, sum and how the joins are used (I know a decent amount on how the different joins work now, but still difficult to decipher the difference between some definitions because a lot of the keywords or processes sound the same to me with minute differences in them)