
SELECT, WHERE, ORDER BY, IFNULL

SELECT, ORDER BY, WHERE, date_format()

SELECT, LEFT JOIN, ON, WHERE

SELECT, WHERE, LIKE와 =

select, is not null, year(), month(), day(), date_format()

select, avg(), round(), as

select, &, sub query

select, inner join, where - with sub query

select, count, distinct, between ~ and ~

in (여러 컬럼)

select, inner join, on, year(), month()

select, group by ( + having), count(*)

select, union, union all, 문자열 비교

select, inner join, group by, having, round, avg

max(), where절에서의 집계함수 사용

distinct, count, is not null

on, is null

sub query, is not null, not in, not exist

group by, sub query, max

case, when, then, datediff

group by, datediff, having

group by, where, count

inner join - on, group by, sum()