sql 사용법 (간단한)

SQL SELECT
SQL DISTINCT
SQL WHERE
SQL AND OR
SQL IN
SQL BETWEEN
SQL LIKE
SQL ORDER BY
SQL 함수
SQL COUNT
SQL GROUP BY
SQL HAVING
SQL 별명
SQL 연결
SQL 외부연결
SQL Subquery
SQL UNION
SQL UNION ALL
SQL INTERSECT
SQL MINUS
SQL CONCATENATE
SQL SUBSTRING
SQL TRIM