Today1. SQL 코드카타2. 태블로 4주차3. 태블로 개인과제 Today I Learned SQL JOIN 후 평균 내기Write an SQL query that reports the average experience years of all the employees for each project, rounded to 2 digits. 1. JOIN 한 테이블SELECT *FROM project p LEFT JOIN employee eON p.employee_id=e.employee_id2. GROUP BY 후 평균 계산한 테이블SELECT p.project_id , ROUND(SUM(experience_years)/COUNT(experience_years),2) AS average_years..