ON e.workdept=d.deptno
C. SELECT e.empno, e.lastname, d.deptname
FROM employee e FULL OUTER JOIN deptnament d
ON e.workdept=d.deptno
D. SELECT e.empno, e.lastname, d.deptname
FROM employee e RIGHT OUTER JOIN department d
WHERE e.workdept=d.deptno
C 23. Given the following statements:
CREATE TABLE mytab
(col1 INT NOT NULL PRIMARY KEY
col2 CHAR (64),
col3 CHAR (32),
col4 INT NOT NULL,
CONSTRAIT c4 UNIQUE (col4, col1))
How many indexes are needed to support the table definition?
A. 0
B. 1
C. 2
D. 3
E. 4
?A 24. Which of the following is the outcome of the following SQL statements?
CREATE TABLE employee (empno INT empname CHAR (30))
CREATE UNIQUE INDEX empno_ind ON employee (empno)
A. Every value for EMPNO will be different.
B. Multiple NULLvalue are allowed in the EMPNO column.
C. An additional unique index cannot be created on the EMPLOYEE table.
D. INSERT statements on the EMPLOYEE table will result in clustered data.
B 25. Given the following tables:
TABLEA TABLEAB
Empid name empid weeknumber paycheck
1 USER1 1 1 2000.00
2 USER2 1 2 3000.00
上一页 1 2 3 4 5 6 78 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 下一页
| 论坛热门帖子: | [lch203] 写得蛮好的linux学习笔记(10-21) [黑马制造] 学习java的30个目标(10-19) [笑傲股林] 做测试半年了,有点迷茫,应该再学些什么提高自己的测试水平和测试能力呢?(10-19) [udp8589] 大家用google的来吱一声? 用百度的~~也来报道下?(10-18) [沂偌掳兆] 本人总结的一些认为C++比较经典的书籍,希望对大家有用(10-18) |
| TAG标签: | 题库 答案 c1 INT selected. SELECT NULL 1record c2 |
注册
个人空间
