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SELECT学号,姓名FROM student s WHERE NOT EXISTS (SELECT*FROM score se WHERE S 学号=s.学号码AND成绩<85) SELECT学号,姓名FROM student S WHERE NOT EXISTS (SELECT*FROM score sc WHERE S 学号=s.学号码AND成绩>=85) SELECT学号,姓名FROM student s,score sc WHERE s.学号=sc.学号AND成绩>=85 SELECT学号,姓名FROM student s,score sc WHERE S.学号=sc.学号AND ALL成绩>=85
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SELECT 学号,姓名 FROM S WHERE NOT EXISTS; (SELECT*FROM SC WHERE S学号=学号 AND 成绩<85) SELECT 学号,姓名FROM S WHERE NOT EXISTS; (SELECT*FROM SC WHERE S学号=学号AND成绩>=85) SELECT学号,姓名FROM S,SC WHERE 学号=S学号 AND成绩>=85 SELECT 学号,姓名 FROM S,SC WHERE 学号=S学号AND ALL成绩>=85
CREATE VIEW AGE_LIST AS; SELECT学号,姓名,YEAR(DATE())-YEAR(出生日期)年龄FROM学生 SELECT学号,姓名,年龄FROMAGE LIST WHERE年龄=22 CREATE VIEWAGE_LIST AS; SELECT学号,姓名,YEAR(出生日期)FROM学生 SELECT学号,姓名,年龄FROM AGE LIST WHERE YEAR(出生日期)=22 CREATE VIEW AGE_LIST AS; SELECT学号,姓名,YEAR(DATE0)-YEAR(出生日期)年龄FROM学生 SELECT学号,姓名,年龄FROM学生WHERE YEAR(出生日期)=22 CREATE VIEW AGE_LIST AS; SELECT学号,姓名,YEAR(DATE())-YEAR(出生日期)年龄FROM学生 SELECT学号,姓名,年龄FROM STUDENT WHERE年龄=22
DELETE FROM score WHERE课程号="Cl"AND学号="20091001" DELETE FROM score WHERE课程号=”Cl”OR学号="20091001" DELETE score WHERE课程号="Cl"AND学号="20091001" DELETE score课程号="Cl"OR学号="20091001"
SELECT学号,姓名FROM student s WHERE NOT EXISTS
(SELECT*FROM score sc WHERE sc.学号=s.学号码AND成绩<85) SELECT学号,姓名FROM student s WHERE NOT EXlSTS
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查询1982年10月6日出生的学生信息,正确的命令是______。SELECT*FROM学生WHERE出生日期="1982-10-6" SELECT*FROM学生WHERE出生日期=1968-10-6 SELECT*FROM学生WHERE出生日期={^1982-10-6
DELETE FROM学生WHERE学号="1001" DROP FROM学生FOR学号="1001" DROP FROM学生WHERE学号="1001" DELETE FROM学生FOR学号="1001"
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FROM(student s JOIN score sc ON s.学号=sc.学号)
JOIN course c ON sc.课程号=c.课程号
wHERE院系="计算机系" SELECT学号,姓名,课程名,成绩
FROM(student s JOIN score sc ON s.学号=sc.学号)
JOIN course c ON sc.课程号=c.课程号
WHERE院系="计算机系"
SELECT学号,姓名FROM S WHERE NOT EXISTS; (SELECT*FROM SC WHERE S学号=学号AND成绩<85) SELECT学号,姓名FROM S WHERE NO TEXISTS; (SELECT*FROM SC WHERE S学号=学号AND成绩>=85) SELECT学号,姓名FROMS,SC; WHERE 学号=S学号AND成绩>=85 SELECT学号,姓名FROMS,SC; WHERE 学号=S学号AND ALL成绩>=85
CREATE VIEW AGE_LIST AS;
SELECT学号,姓名,YEAR(DATE())-YEAR(出生日期)年龄FROM学生
SELECT学号,姓名,年龄FROMAGE LIST WHERE年龄=22 CREATE VIEWAGE_LIST AS;
SELECT学号,姓名,YEAR(出生日期)FROM学生
SELECT学号,姓名,年龄FROM AGE LIST WHERE YEAR(出生日期)=22 CREATE VIEW AGE_LIST AS;
SELECT学号,姓名,YEAR(DATE0)-YEAR(出生日期)年龄FROM学生
SELECT学号,姓名,年龄FROM学生WHERE YEAR(出生日期)=22 CREATE VIEW AGE_LIST AS;
SELECT学号,姓名,YEAR(DATE())-YEAR(出生日期)年龄FROM学生
SELECT学号,姓名,年龄FROM STUDENT WHERE年龄=22
SELECT学号,姓名 FROM S WHERE NOT EXISTS;
(SELECT*FROM SC WHERE SC.学号=S.学号 AND 成绩<851 SELECT学号,姓名 FROM S WHERE NOT EXISTS;
(SELECT*FROM SC WHERE SC.学号=S.学号 AND 成绩>=85) SELECT学号,姓名FROM S,SC
WHERE S.学号=SC.学号 AND 成绩>=85 SELECT学号,姓名FROM S,SC
WHERE S.学号=SC.学号 AND ALL成绩>=85
SELECT学号,姓名,平均成绩FROM S,SC; WHERE 学号=S学号; GROUP BY 学号HAVING COUNT(*)>=5 ORDER BY平均成绩DESC SELECT学号,姓名,AVG(成绩)FROMS,SC; WHERE 学号=S学号AND COUNT(*)>=5; GROUP BY学号ORDER BY 3 DESC SELECT学号,姓名,AVG(成绩)平均成绩FROM S,SC; WHERE 学号;S学号AND COUNT(*)>=5; GROUP BY 学号ORDER BY平均成绩DESC SELECT学号,姓名,AVG(成绩)平均成绩FROMS,SC, WHERE 学号:S学号; GROUP BY学号HAVING COUNT(*)7=5 ORDER BY 3 DESC
SELECT 学号,姓名 FROM S WHERE NOT EXISTS; (SELECT * FROM SC WHERE SC.学号=S.学号 AND 成绩<85) SELECT 学号,姓名 FROM S WHERE NOT EXISTS; (SELECT * FROM SC WHERE SC.学号=S.学号 AND 成绩>=85) SELECT 学号,姓名 FROM S,SC; WHERE S.学号=SC.学号 AND 成绩>=85 SELECT 学号,姓名 FROM S,SC; WHERE S.学号=SC.学号 AND ALL 成绩>=85
SELECT学号,姓名FROM S WHERE NOT EXISTS;
(SELECT*FROM SC WHERE SC.学号=S.学号AND成绩<85) SELECT学号,姓名FROM S WHERE NOT EXISTS;
(SELECT*FROM SC WHERE SC.学号=S.学号AND成绩>=85) SELECT学号,姓名FROM S,SC
WHERE S.学号=SC.学号AND成绩>=85 SELECT学号,姓名FROM S,SC
WHERE S.学号=SC.学号AND ALL成绩>=85
CREATE VIEW AGE_LIST AS;
SELECT学号,姓名,YEAR(DATE())-YEAR(出生日期)年龄FROM学生;
SELECT学号,姓名,年龄FROM AGE_LIST WHERE年龄=22 CREATE VIEW AGE_LIST AS;
SELECT学号,姓名,YEAR(出生日期)FROM学生:
SELECT学号,姓名,年龄FROM AGE_LIST WHERE YEAR(出生日期)=22 CREATE VIEW AGE_LIST AS;
SELECT学号,姓名,YEAR(DATE())-YEAR(出生日期)年龄FROM学生;
SELECT学号,姓名,年龄FROM学生WHERE YEAR(出生日期)=22 CREATE VIEW AGE_LIST AS STUDENT;
SELECT学号,姓名,YEAR(DATE()).YEAR(出生日期)年龄FROM学生;
SELECT学号,姓名,年龄FROM STUDENT WHERE年龄=22