当前位置: X题卡 > 所有题目 > 题目详情

在关系模式R(姓名,性别,出生日期)中,最适合作为主键的是( )。

查看本题答案

你可能感兴趣的试题

SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)AS年龄FROM职工; WHERE年龄>35  SELECT姓名,性别,YEAR(DATE0)•YEAR(出生日期)AS年龄FROM职工;WHERE YEAR(出生日期)>35  SELECT姓名,性别,YEAR(DATE0)-Y11A只<出生日期)AS年龄FROM职工;WHEREYEAR(DATE())-YEAR(出生日期)>35  SELECT姓名,性别,年龄=YEAR(DATE0)•YEAR(出生日期)FROM职工; WHERE YEAR(DATE0)-YEAR(出生日期)>35  
SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)AS年龄FROM职工;
WHERE年龄>35  
SELECT姓名,性别,YEAR(DATE0)•YEAR(出生日期)AS年龄FROM职工;WHERE YEAR(出生日期)>35  SELECT姓名,性别,YEAR(DATE0)-Y11A只<出生日期)AS年龄FROM职工;WHEREYEAR(DATE())-YEAR(出生日期)>35  SELECT姓名,性别,年龄=YEAR(DATE0)•YEAR(出生日期)FROM职工; WHERE YEAR(DATE0)-YEAR(出生日期)>35  
SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期)年龄 FROM 职工 WHERE年龄<=40  SELECT 姓名,性别, YEAR(DATE())-YEAR (出生日期) 年龄 FROM 职工 WHERE YEAR(出生日期)<=40  SELECT 姓名,性别, YEAR(DATE())-YEAR (出生日期) 年龄 FROM 职工 WHERE YEAR (DATE())-YEAR (出生日期)<=40  SELECT 姓名,性别,年龄=YEAR(DATE())-YEAR (出生日期) FROM 职工 WHERE YEAR(DATE())-YEAR(出生日期)<=40  
SELECT姓名,性别,YEAR(DAET())-YEAR(出生日期)年龄FROM职工; WHERE年龄>35  SELECT姓名,性别,YEAR(DAET())-YEAR(出生日期)年龄FROM职工;WHERE YEAR(出生日期)>35  SELECT姓名,性别,年龄=YEAR(DATE())-YEAR(出生日期)FROM职工; WHERE YEAR(DAET())-YEAR(出生日期)>35  SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)年龄FROM职工; WHERE YEAR(DATE())-YEAR(出生日期)>35  
SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期) 年龄 FROM 职工 WHERE
年龄<=40  
SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期) 年龄 FROM 职工 WHERE
YEAR(出生日期)<=40  
SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期) 年龄 FROM 职工 WHERE
YEAR(DATE())-YEAR(出生日期)<=40  
SELECT 姓名,性别,年龄=YEAR(DATE())-YEAR(出生日期) FROM 职工 WHERE
YEAR(DATE())-YEAR(出生日期)<=40  
SELECT姓名性别,年龄FROM学生WHERE年龄<22  SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)as年龄FROM学生 WHERE YEAR(出生日期)<22  SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)as年龄FROM学生 WHERE;YEAR(DATE()).YEAR(出生日期)<22  SELECT姓名,性别,年龄=YEAR(DATE())-YEAR(出生日期)FROM学生 WHERE YEAR(DATE())-YEAR(出生日期)<22  
姓名  年龄  出生日期  姓名,年龄,出生日期  
zg(姓名、出生日期、年龄、职称)  zg(姓名,出生日期,年龄,职称)  zg(姓名,出生日期,年龄,职称)  姓名、出生日期、年龄、职称  
SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)年龄FROM职工WHERE年龄<=40  SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)年龄FROM职工WHERE YEAR(出生日期)<=40  SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)年龄FROM职工WHERE YEAR(DATE0)-YEAR(出生日期)<=40  SELECT姓名,性别,年龄=YEAR(DATE())-YEAR(出生日期)FROM职工WHERE YEAR(DATE0)-YEAR(出生日期)<=40  
SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期) 年龄 FROM 职工 WHERE 年龄<=40  SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期) 年龄 FROM 职工 WHERE YEAR(出生日期)<=40  SELECT 姓名,性别,YEAR(DATE())—YEAR(出生日期) 年龄 FROM 职工 WHERE YEAR(DATE0)—YEAR(出生日期)<=40  SELECT 姓名,性别,年龄=YEAR(DATE())-YEAR(出生日期) FROM 职工 WHERE YEAR(DATE())-YEAR(出生日期)<=40  
SELECT姓名,性别,出生日期FROM职称表where职称=“副教授”  LISTFIELDS姓名,性别,出生日期FOR职称=“副教授”  SELECT姓名,出生日期FROM职称表  SELECT姓名,性别,出生日期FOR职称=“副教授”  
SELECT 姓名,性别,出生日期 FROM 职工 WHERE 出生日期<1975   SELECT 姓名,性别,出生日期 FROM 职工 WHERE 出生日期>1975   SELECT 姓名,性别,出生日期 FROM 职工 WHEREYEAR(出生日期)<1975   SELECT 姓名,性别,出生日期 FROM 职工 WHEREYEAR(出生年月),1975  
SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期)年龄 FROM 职工 WHERE年龄<=40  SELECT 姓名,性别, YEAR(DATE())-YEAR (出生日期) 年龄 FROM 职工 WHERE
YEAR(出生日期)<=40  
SELECT 姓名,性别, YEAR(DATE())-YEAR (出生日期) 年龄 FROM 职工 WHERE
YEAR (DATE())-YEAR (出生日期)<=40  
SELECT 姓名,性别,年龄=YEAR(DATE())-YEAR (出生日期) FROM 职工 WHERE
YEAR(DATE())-YEAR(出生日期)<=40  
SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期)年龄 FROM 职工 WHERE年龄<=40  SELECT 姓名,性别, YEAR(DATE())-YEAR (出生日期) 年龄 FROM 职工 WHERE  YEAR(出生日期)<=40  SELECT 姓名,性别, YEAR(DATE())-YEAR (出生日期) 年龄 FROM 职工 WHERE  YEAR (DATE())-YEAR (出生日期)<=40  SELECT 姓名,性别,年龄=YEAR(DATE())-YEAR (出生日期) FROM 职工 WHERE  YEAR(DATE())-YEAR(出生日期)<=40  
SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)年龄FROM职工WHERE年龄<=40  SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)年龄FROM职工WHERE YEAR(出生日期)<=40  SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)年龄FROM职工WHERE YEAR(DATE())-YEAR(出生日期)<=40  SELECT姓名,性别,年龄=YEAR(DATE())-YEAR(出生日期)FROM职工WHERE YEAR(DATE())-YEAR(出生日期)<=40  
SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期)AS年龄FROM职工;   WHERE年龄>35  SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期)AS年龄FROM 职工;   WHERE YEAR(出生日期)>35  SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)AS年龄FROM 职工;   WHEREYEAR(DATE())-YEAR(出生日期)>35  SELECT姓名,性别,年龄:YEAR(DATE())-YEAR(出生日期)FROM 职工;   WHERE YEAR(DATE())-YEAR(出生日期)>35  
SELECT姓名,性别,YEAR(DAET())-YEAR(出生日期)年龄FROM职工;  WHERE年龄>35  SELECT姓名,性别,YEAR(DAET())-YEAR(出生日期)年龄FROM职工;  WHERE YEAR(出生日期)>35  SELECT姓名,性别,年龄=YEAR(DATE())-YEAR(出生日期)FROM职工;  WHERE YEAR(DAET())-YEAR(出生日期)>35  SELECT姓名,性别,YEAR(DATE())-YEAR(出生日期)年龄FROM职工;  WHERE YEAR(DATE())-YEAR(出生日期)>35  
SELECT 姓名,性别,年龄 FROM 学生 WHERE 年龄<22  SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期)as 年龄 FROM 学生 WHERE YEAR (出生日期)<22  SELECT 姓名,性别,YEAR(DATE())-YEAR(出生日期)as 年龄 FROM 学生 WHERE;YEAR (DATE())-YEAR(出生日期)<22  SELECT 姓名,性别,年龄=YEAR(DATE())-YEAR(出生日期)FROM 学生 WHERE YEAR (DATE())-YEAR(出生日期)<22  

热门试题

更多