if语句.sql

SQL Server数据库设计和高级查询[SQL Advance]

DECLARE @myavg float
SELECT @myavg=AVG(writtenExam)  from stuMarks
print '本班平均分'+convert(varchar(5),@myavg)
IF (@myavg>70)
  BEGIN
    print '本班笔试成绩优秀，前三名的成绩为'
    SELECT TOP 3 * FROM stuMarks ORDER BY writtenExam DESC
  END
ELSE
  BEGIN
    print '本班笔试成绩较差，后三名的成绩为'
    SELECT TOP 3 * FROM stuMarks ORDER BY writtenExam DESC
  END