我有一个TABLE_A，它包含一个以逗号分隔值作为数据的列。现在我必须将这些逗号分隔值放入250列的表B中，这必须动态完成吗？
答案 0 :(得分：0)
这是一个快速而又脏的脚本，可以帮助您实现目标
SQL> create table T ( c clob );
Table created.
SQL>
SQL> create table t1 ( c1 varchar2(50) );
Table created.
SQL> begin
2 for i in 2 .. 250 loop
3 execute immediate 'alter table t1 add c'||i||' varchar2(50)';
4 end loop;
5 end;
6 /
PL/SQL procedure successfully completed.
SQL>
SQL> declare
2 v clob := 'somedata1';
3 begin
4 for i in 2 .. 250 loop
5 v := v || ',somedata'||i;
6 end loop;
7 insert into t
8 select v from dual connect by level <= 2000;
9 end;
10 /
PL/SQL procedure successfully completed.
SQL>
SQL> set timing on
SQL> declare
2 type t_cols is table of varchar2(100) index by pls_integer;
3 l_cols t_cols;
4
5 l_comma pls_integer;
6 l_text varchar2(32767);
7
8 l_insert_sql varchar2(4000) := 'insert into t1 values (:1';
9 begin
10 for i in 2 .. 250 loop
11 l_insert_sql := l_insert_sql || ',:'||i;
12 end loop;
13 l_insert_sql := l_insert_sql || ')';
14
15 for i in ( select rownum r, c from t ) loop
16 l_text := i.c||',';
17
18 for x in 1 .. 250 loop
19 l_comma := instr(l_text,',');
20 l_cols(x) := substr(l_text,1,l_comma-1);
21 l_text := substr(l_text,l_comma+1);
22 end loop;
23
24 execute immediate l_insert_sql
25 using
26 l_cols(1)
27 ,l_cols(2)
28 ,l_cols(3)
29 ,l_cols(4)
30 ,l_cols(5)
31 ,l_cols(6)
32 ,l_cols(7)
33 ,l_cols(8)
34 ,l_cols(9)
35 ,l_cols(10)
36 ,l_cols(11)
37 ,l_cols(12)
38 ,l_cols(13)
39 ,l_cols(14)
40 ,l_cols(15)
41 ,l_cols(16)
42 ,l_cols(17)
43 ,l_cols(18)
44 ,l_cols(19)
45 ,l_cols(20)
46 ,l_cols(21)
47 ,l_cols(22)
48 ,l_cols(23)
49 ,l_cols(24)
50 ,l_cols(25)
51 ,l_cols(26)
52 ,l_cols(27)
53 ,l_cols(28)
54 ,l_cols(29)
55 ,l_cols(30)
56 ,l_cols(31)
57 ,l_cols(32)
58 ,l_cols(33)
59 ,l_cols(34)
60 ,l_cols(35)
61 ,l_cols(36)
62 ,l_cols(37)
63 ,l_cols(38)
64 ,l_cols(39)
65 ,l_cols(40)
66 ,l_cols(41)
67 ,l_cols(42)
68 ,l_cols(43)
69 ,l_cols(44)
70 ,l_cols(45)
71 ,l_cols(46)
72 ,l_cols(47)
73 ,l_cols(48)
74 ,l_cols(49)
75 ,l_cols(50)
76 ,l_cols(51)
77 ,l_cols(52)
78 ,l_cols(53)
79 ,l_cols(54)
80 ,l_cols(55)
81 ,l_cols(56)
82 ,l_cols(57)
83 ,l_cols(58)
84 ,l_cols(59)
85 ,l_cols(60)
86 ,l_cols(61)
87 ,l_cols(62)
88 ,l_cols(63)
89 ,l_cols(64)
90 ,l_cols(65)
91 ,l_cols(66)
92 ,l_cols(67)
93 ,l_cols(68)
94 ,l_cols(69)
95 ,l_cols(70)
96 ,l_cols(71)
97 ,l_cols(72)
98 ,l_cols(73)
99 ,l_cols(74)
100 ,l_cols(75)
101 ,l_cols(76)
102 ,l_cols(77)
103 ,l_cols(78)
104 ,l_cols(79)
105 ,l_cols(80)
106 ,l_cols(81)
107 ,l_cols(82)
108 ,l_cols(83)
109 ,l_cols(84)
110 ,l_cols(85)
111 ,l_cols(86)
112 ,l_cols(87)
113 ,l_cols(88)
114 ,l_cols(89)
115 ,l_cols(90)
116 ,l_cols(91)
117 ,l_cols(92)
118 ,l_cols(93)
119 ,l_cols(94)
120 ,l_cols(95)
121 ,l_cols(96)
122 ,l_cols(97)
123 ,l_cols(98)
124 ,l_cols(99)
125 ,l_cols(100)
126 ,l_cols(101)
127 ,l_cols(102)
128 ,l_cols(103)
129 ,l_cols(104)
130 ,l_cols(105)
131 ,l_cols(106)
132 ,l_cols(107)
133 ,l_cols(108)
134 ,l_cols(109)
135 ,l_cols(110)
136 ,l_cols(111)
137 ,l_cols(112)
138 ,l_cols(113)
139 ,l_cols(114)
140 ,l_cols(115)
141 ,l_cols(116)
142 ,l_cols(117)
143 ,l_cols(118)
144 ,l_cols(119)
145 ,l_cols(120)
146 ,l_cols(121)
147 ,l_cols(122)
148 ,l_cols(123)
149 ,l_cols(124)
150 ,l_cols(125)
151 ,l_cols(126)
152 ,l_cols(127)
153 ,l_cols(128)
154 ,l_cols(129)
155 ,l_cols(130)
156 ,l_cols(131)
157 ,l_cols(132)
158 ,l_cols(133)
159 ,l_cols(134)
160 ,l_cols(135)
161 ,l_cols(136)
162 ,l_cols(137)
163 ,l_cols(138)
164 ,l_cols(139)
165 ,l_cols(140)
166 ,l_cols(141)
167 ,l_cols(142)
168 ,l_cols(143)
169 ,l_cols(144)
170 ,l_cols(145)
171 ,l_cols(146)
172 ,l_cols(147)
173 ,l_cols(148)
174 ,l_cols(149)
175 ,l_cols(150)
176 ,l_cols(151)
177 ,l_cols(152)
178 ,l_cols(153)
179 ,l_cols(154)
180 ,l_cols(155)
181 ,l_cols(156)
182 ,l_cols(157)
183 ,l_cols(158)
184 ,l_cols(159)
185 ,l_cols(160)
186 ,l_cols(161)
187 ,l_cols(162)
188 ,l_cols(163)
189 ,l_cols(164)
190 ,l_cols(165)
191 ,l_cols(166)
192 ,l_cols(167)
193 ,l_cols(168)
194 ,l_cols(169)
195 ,l_cols(170)
196 ,l_cols(171)
197 ,l_cols(172)
198 ,l_cols(173)
199 ,l_cols(174)
200 ,l_cols(175)
201 ,l_cols(176)
202 ,l_cols(177)
203 ,l_cols(178)
204 ,l_cols(179)
205 ,l_cols(180)
206 ,l_cols(181)
207 ,l_cols(182)
208 ,l_cols(183)
209 ,l_cols(184)
210 ,l_cols(185)
211 ,l_cols(186)
212 ,l_cols(187)
213 ,l_cols(188)
214 ,l_cols(189)
215 ,l_cols(190)
216 ,l_cols(191)
217 ,l_cols(192)
218 ,l_cols(193)
219 ,l_cols(194)
220 ,l_cols(195)
221 ,l_cols(196)
222 ,l_cols(197)
223 ,l_cols(198)
224 ,l_cols(199)
225 ,l_cols(200)
226 ,l_cols(201)
227 ,l_cols(202)
228 ,l_cols(203)
229 ,l_cols(204)
230 ,l_cols(205)
231 ,l_cols(206)
232 ,l_cols(207)
233 ,l_cols(208)
234 ,l_cols(209)
235 ,l_cols(210)
236 ,l_cols(211)
237 ,l_cols(212)
238 ,l_cols(213)
239 ,l_cols(214)
240 ,l_cols(215)
241 ,l_cols(216)
242 ,l_cols(217)
243 ,l_cols(218)
244 ,l_cols(219)
245 ,l_cols(220)
246 ,l_cols(221)
247 ,l_cols(222)
248 ,l_cols(223)
249 ,l_cols(224)
250 ,l_cols(225)
251 ,l_cols(226)
252 ,l_cols(227)
253 ,l_cols(228)
254 ,l_cols(229)
255 ,l_cols(230)
256 ,l_cols(231)
257 ,l_cols(232)
258 ,l_cols(233)
259 ,l_cols(234)
260 ,l_cols(235)
261 ,l_cols(236)
262 ,l_cols(237)
263 ,l_cols(238)
264 ,l_cols(239)
265 ,l_cols(240)
266 ,l_cols(241)
267 ,l_cols(242)
268 ,l_cols(243)
269 ,l_cols(244)
270 ,l_cols(245)
271 ,l_cols(246)
272 ,l_cols(247)
273 ,l_cols(248)
274 ,l_cols(249)
275 ,l_cols(250);
276
277 end loop;
278
279 end;
280 /
PL/SQL procedure successfully completed.
Elapsed: 00:00:01.11
SQL>