แต่ละหลักสูตรมีกี่หลักสูตร? แสดงแผนภูมิแท่งให้ฉันดู โดยเรียงตาม X ตามลำดับ ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many courses for each course description? Show me a bar chart, list by the X in desc.It is not neccessary to use all the tables.
 STUDENT:  STU_NUM [ int]  STU_LNAME [ varchar(15)]  STU_FNAME [ varchar(15)]  STU_INIT [ varchar(1)]  STU_DOB [ datetime]  STU_HRS [ int]  STU_CLASS [ varchar(2)]  STU_GPA [ float(8)]  STU_TRANSFER [ numeric]  DEPT_CODE [ varchar(18)]  STU_PHONE [ varchar(4)]  PROF_NUM [ int] 
SELECT CRS_DESCRIPTION, COUNT(CRS_DESCRIPTION) FROM CLASS AS T1 JOIN EMPLOYEE AS T2 ON T1.PROF_NUM = T2.EMP_NUM JOIN COURSE AS T3 ON T1.CRS_CODE = T3.CRS_CODE JOIN PROFESSOR AS T4 ON T2.EMP_NUM = T4.EMP_NUM GROUP BY CRS_DESCRIPTION ORDER BY CRS_DESCRIPTION DESC