Oracle OCP 082知识
剩余时间：
第 60 题 (单选题)：
Examine the description of the EMPLOYEES table NLS_DATE_FORMAT is set to DD-MON-YY Which query requires explicit_data type conversion.
A. SELECT join_date FROM employees WHERE join_date > '10-02-2018'; .
B. SELECT join_date || ' ' || salary FROM employees.
C. SELECT salary + '120.50' FROM employees.
D. SELECT SUBSTR( join_date, 1, 2)-10 FROM employees .
E. SELECT join_date + '20' FROM employees
显示答案
正确答案：
A
解析：
上一题
下一题
1
2
3
4
5
6
7
8
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
69
70
71
72
73
74
75
76
77
78
79
80