题目内容
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关系代数表达式：![关系代数表达式： [图] 其对应的SQL语句为（）。A、SELECT...关系代数表达式： 其对应](http://static.jiandati.com/c6d0e4f-chaoxing2016-428231.jpeg)
其对应的SQL语句为（）。
A、SELECT * FROM examinee;
B、SELECT DISTINCT eename,eeage,eesex FROM examinee;
C、SELECT * FROM examinee(eename,eeage,eesex);
D、SELECT eename,eeage,eesex ;
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关系代数表达式：
其对应的SQL语句为（ ）。
A、SELECT eeage=18 FROM examinee;
B、SELECT eeage FROM examinee;
C、SELECT eeage FROM examinee WHERE eeage=18;
D、SELECT * FROM examinee WHERE eeage=18;
E、SELECT * FROM examinee HAVING eeage=18;
关系代数表达式：
其对应的SQL语句为（ ）。
A、SELECT DISTINCT eename,eedepa FROM examinee;
B、SELECT eename,eedepa FROM examinee;
C、SELECT * FROM examinee;
D、SELECT DISTINCT * FROM examinee;
有关系代数表达式：
与其执行结果等价的pgSQL语句为（ ）。
A、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam,examinee WHERE examinee.eeid=eeexam.eeid;
B、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam CROSS JOIN examinee WHERE examinee.eeid=eeexam.eeid;
C、SELECT DISTINCT eeid,eename,eid FROM eeexam NATURAL JOIN examinee;
D、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam JOIN examinee ON examinee.eeid=eeexam.eeid;
E、SELECT DISTINCT eeid,eename,eid FROM eeexam JOIN examinee USING(eeid);
F、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam,examinee;
G、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam CROSS JOIN examinee;
H、SELECT DISTINCT eeid,eename,eid FROM eeexam NATURAL JOIN examinee WHERE examinee.eeid=eeexam.eeid;
I、SELECT DISTINCT examinee.eeid,eename,eid FROM eeexam JOIN examinee WHERE examinee.eeid=eeexam.eeid;
有关系代数表达式：
与其执行结果等价的pgSQL语句为（ ）。
A、SELECT * FROM eeexam,examinee WHERE examinee.eeid=eeexam.eeid;
B、SELECT * FROM eeexam CROSS JOIN examinee WHERE examinee.eeid=eeexam.eeid;
C、SELECT * FROM eeexam NATURAL JOIN examinee;
D、SELECT * FROM eeexam JOIN examinee ON examinee.eeid=eeexam.eeid;
E、SELECT * FROM eeexam JOIN examinee USING(eeid);
F、SELECT * FROM eeexam,examinee;
G、SELECT * FROM eeexam CROSS JOIN examinee;
H、SELECT * FROM eeexam NATURAL JOIN examinee WHERE examinee.eeid=eeexam.eeid;
I、SELECT * FROM eeexam JOIN examinee WHERE examinee.eeid=eeexam.eeid;
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