7-03.sql

sql2000工程实践一书的代码 可以直接调试

DECLARE @fltScope FLOAT ,@strResult CHAR(2)
SELECT @fltScope = 45

SET @strResult=
CASE
    WHEN @fltScope<70 AND @fltScope>=60 THEN '可'
    WHEN @fltScope<80 AND @fltScope>=70 THEN '中'
    WHEN @fltScope<90 AND @fltScope>=80 THEN '良'
    WHEN @fltScope<=100 AND @fltScope>=90 THEN '优'
    ELSE '差'
END
PRINT '学生评级结果:'+ @StrResult
GO