成绩表 SCInfo(StId,CNo,Score) 的属性StId表示学号，CNo为课程编号，Score为成绩。从SCInfo表中找出无成绩的元组的SQL语句是（ ）。
A: SELECT * FROM SCInfo WHERE Score=NULL
B: SELECT * FROM SCInfo WHERE Score IS ''
C: SELECT * FROM SCInfo WHERE Score =''
D: SELECT * FROM SCInfo WHERE Score IS NULL
A: SELECT * FROM SCInfo WHERE Score=NULL
B: SELECT * FROM SCInfo WHERE Score IS ''
C: SELECT * FROM SCInfo WHERE Score =''
D: SELECT * FROM SCInfo WHERE Score IS NULL
举一反三
- 完成以下语句，查询SCInfo(Stid,CNo,Score)表中成绩为85或者88的记录。（注：使用大写字母答题）SELECT * FROM SCInfo WHERE SCORE=85 _______ SCORE=88
- 查询选修课程号为“9710011”的课程的学生学号，成绩。select stid, score from scinfo where cno=_______________
- 以下代码创建存储过程p_score，查询SCInfo表中课程编号CNo为“0003”的学号StID、成绩score信息，请将下面的存储过程补充完整。CREATE ________ p_scoreAS SELECT StID 学号, score 成绩 FROM SCInfo WHERE CNo='0003'
- 查询选修课程好为'971001'的课程的学生学号和成绩：select stid,score from scinfo where cno=_____________
- 以下代码创建和执行存储过程pro_score，查询SCInfo表中课程编号CNo为“0002”的学号StID、成绩Score信息，请将下面的存储过程补充完整。 CREATE PROC pro_score AS SELECT StID, ________ FROM SCInfo WHERE CNo='0002'