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replace 函數用法如下:
replace(‘將要更改的字串‘,‘被替換掉的字串‘,‘替換字串‘)
oracle 中chr()函數
CHR() --將ASCII碼轉換為字元
文法
CHR(number_code)
樣本
select CHR(116) from dual; --返回‘t‘
幾個常用的chr()函數:
chr(9) --定位字元
chr(10) --分行符號
chr(13) --斷行符號符
chr(32) --空格符
chr(34) --雙引號“"”
例:replace(‘111<br/>333444‘,chr(13)||chr(10), ‘ ‘)
CHR()有個對應的函數ASCII(),可以實現相反的作用。
ASCII() --將字元轉換為ASCII碼
文法 ASCII(single_character)
樣本 select ASCII(‘t‘) from dual; --返回116
ASCII表
Dec |
Hex |
Oct |
Char |
Description |
0 |
0 |
000 |
|
null |
1 |
1 |
001 |
|
start of heading |
2 |
2 |
002 |
|
start of text |
3 |
3 |
003 |
|
end of text |
4 |
4 |
004 |
|
end of transmission |
5 |
5 |
005 |
|
enquiry |
6 |
6 |
006 |
|
acknowledge |
7 |
7 |
007 |
|
bell |
8 |
8 |
010 |
|
backspace |
9 |
9 |
011 |
|
horizontal tab |
10 |
A |
012 |
|
new line |
11 |
B |
013 |
|
vertical tab |
12 |
C |
014 |
|
new page |
13 |
D |
015 |
|
carriage return |
14 |
E |
016 |
|
shift out |
15 |
F |
017 |
|
shift in |
16 |
10 |
020 |
|
data link escape |
17 |
11 |
021 |
|
device control 1 |
18 |
12 |
022 |
|
device control 2 |
19 |
13 |
023 |
|
device control 3 |
20 |
14 |
024 |
|
device control 4 |
21 |
15 |
025 |
|
negative acknowledge |
22 |
16 |
026 |
|
synchronous idle |
23 |
17 |
027 |
|
end of trans. block |
24 |
18 |
030 |
|
cancel |
25 |
19 |
031 |
|
end of medium |
26 |
1A |
032 |
|
substitute |
27 |
1B |
033 |
|
escape |
28 |
1C |
034 |
|
file separator |
29 |
1D |
035 |
|
group separator |
30 |
1E |
036 |
|
record separator |
31 |
1F |
037 |
|
unit separator |
32 |
20 |
040 |
|
space |
33 |
21 |
041 |
! |
|
34 |
22 |
042 |
" |
|
35 |
23 |
043 |
# |
|
36 |
24 |
044 |
$ |
|
37 |
25 |
045 |
% |
|
38 |
26 |
046 |
& |
|
39 |
27 |
047 |
‘ |
|
40 |
28 |
050 |
( |
|
41 |
29 |
051 |
) |
|
42 |
2A |
052 |
* |
|
43 |
2B |
053 |
+ |
|
44 |
2C |
054 |
, |
|
45 |
2D |
055 |
- |
|
46 |
2E |
056 |
. |
|
47 |
2F |
057 |
/ |
|
48 |
30 |
060 |
0 |
|
49 |
31 |
061 |
1 |
|
50 |
32 |
062 |
2 |
|
51 |
33 |
063 |
3 |
|
52 |
34 |
064 |
4 |
|
53 |
35 |
065 |
5 |
|
54 |
36 |
066 |
6 |
|
55 |
37 |
067 |
7 |
|
56 |
38 |
070 |
8 |
|
57 |
39 |
071 |
9 |
|
58 |
3A |
072 |
: |
|
59 |
3B |
073 |
; |
|
60 |
3C |
074 |
< |
|
61 |
3D |
075 |
= |
|
62 |
3E |
076 |
> |
|
63 |
3F |
077 |
? |
|
64 |
40 |
100 |
@ |
|
65 |
41 |
101 |
A |
|
66 |
42 |
102 |
B |
|
67 |
43 |
103 |
C |
|
68 |
44 |
104 |
D |
|
69 |
45 |
105 |
E |
|
70 |
46 |
106 |
F |
|
71 |
47 |
107 |
G |
|
72 |
48 |
110 |
H |
|
73 |
49 |
111 |
I |
|
74 |
4A |
112 |
J |
|
75 |
4B |
113 |
K |
|
76 |
4C |
114 |
L |
|
77 |
4D |
115 |
M |
|
78 |
4E |
116 |
N |
|
79 |
4F |
117 |
O |
|
80 |
50 |
120 |
P |
|
81 |
51 |
121 |
Q |
|
82 |
52 |
122 |
R |
|
83 |
53 |
123 |
S |
|
84 |
54 |
124 |
T |
|
85 |
55 |
125 |
U |
|
86 |
56 |
126 |
V |
|
87 |
57 |
127 |
W |
|
88 |
58 |
130 |
X |
|
89 |
59 |
131 |
Y |
|
90 |
5A |
132 |
Z |
|
91 |
5B |
133 |
[ |
|
92 |
5C |
134 |
\ |
|
93 |
5D |
135 |
] |
|
94 |
5E |
136 |
^ |
|
95 |
5F |
137 |
_ |
|
96 |
60 |
140 |
` |
|
97 |
61 |
141 |
a |
|
98 |
62 |
142 |
b |
|
99 |
63 |
143 |
c |
|
100 |
64 |
144 |
d |
|
101 |
65 |
145 |
e |
|
102 |
66 |
146 |
f |
|
103 |
67 |
147 |
g |
|
104 |
68 |
150 |
h |
|
105 |
69 |
151 |
i |
|
106 |
6A |
152 |
j |
|
107 |
6B |
153 |
k |
|
108 |
6C |
154 |
l |
|
109 |
6D |
155 |
m |
|
110 |
6E |
156 |
n |
|
111 |
6F |
157 |
o |
|
112 |
70 |
160 |
p |
|
113 |
71 |
161 |
q |
|
114 |
72 |
162 |
r |
|
115 |
73 |
163 |
s |
|
116 |
74 |
164 |
t |
|
117 |
75 |
165 |
u |
|
118 |
76 |
166 |
v |
|
119 |
77 |
167 |
w |
|
120 |
78 |
170 |
x |
|
121 |
79 |
171 |
y |
|
122 |
7A |
172 |
z |
|
123 |
7B |
173 |
{ |
|
124 |
7C |
174 |
| |
|
125 |
7D |
175 |
} |
|
126 |
7E |
176 |
~ |
|
127 |
7F |
177 |
DEL |
|