MYSQL 批量增删效率分析

Posted 2021-04-23 PHP大神

来源：http://i0k.cn/5jcbW

一、SQL 合并前

1、插入语句

• 插入语句语法如下：

  INSERT INTO table_name(...) VALUES (...);

• 我们写一个循环执行 1000 条 INSERT 语句：

 DECLARE i INT DEFAULT 1; WHILE i<1000 DO INSERT INTO tab_char_info(char_id) VALUES(i); SET i = i+1;    END WHILE;

• 在我本机测试的时间是 44.549 秒；

2、删除语句

• 删除语句语法如下：

  DELETE FROM table_name where column_name=column_value;

• 我们写一个循环执行 1000 条 DELETE 语句：

 DECLARE i INT DEFAULT 1; WHILE i<1000 DO DELETE FROM tab_char_info where char_id=i; SET i = i+1;    END WHILE;

• 在我本机测试的时间是 44.234 秒；

二、SQL 合并后

1、插入语句

• 将所有的插入语句合并到一句话以后，SQL底层会有自己的优化；

INSERT INTO tab_char_info (char_id) VALUES (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),(81),(82),(83),(84),(85),(86),(87),(88),(89),(90),(91),(92),(93),(94),(95),(96),(97),(98),(99),(100),(101),(102),(103),(104),(105),(106),(107),(108),(109),(110),(111),(112),(113),(114),(115),(116),(117),(118),(119),(120),(121),(122),(123),(124),(125),(126),(127),(128),(129),(130),(131),(132),(133),(134),(135),(136),(137),(138),(139),(140),(141),(142),(143),(144),(145),(146),(147),(148),(149),(150),(151),(152),(153),(154),(155),(156),(157),(158),(159),(160),(161),(162),(163),(164),(165),(166),(167),(168),(169),(170),(171),(172),(173),(174),(175),(176),(177),(178),(179),(180),(181),(182),(183),(184),(185),(186),(187),(188),(189),(190),(191),(192),(193),(194),(195),(196),(197),(198),(199),(200),(201),(202),(203),(204),(205),(206),(207),(208),(209),(210),(211),(212),(213),(214),(215),(216),(217),(218),(219),(220),(221),(222),(223),(224),(225),(226),(227),(228),(229),(230),(231),(232),(233),(234),(235),(236),(237),(238),(239),(240),(241),(242),(243),(244),(245),(246),(247),(248),(249),(250),(251),(252),(253),(254),(255),(256),(257),(258),(259),(260),(261),(262),(263),(264),(265),(266),(267),(268),(269),(270),(271),(272),(273),(274),(275),(276),(277),(278),(279),(280),(281),(282),(283),(284),(285),(286),(287),(288),(289),(290),(291),(292),(293),(294),(295),(296),(297),(298),(299),(300),(301),(302),(303),(304),(305),(306),(307),(308),(309),(310),(311),(312),(313),(314),(315),(316),(317),(318),(319),(320),(321),(322),(323),(324),(325),(326),(327),(328),(329),(330),(331),(332),(333),(334),(335),(336),(337),(338),(339),(340),(341),(342),(343),(344),(345),(346),(347),(348),(349),(350),(351),(352),(353),(354),(355),(356),(357),(358),(359),(360),(361),(362),(363),(364),(365),(366),(367),(368),(369),(370),(371),(372),(373),(374),(375),(376),(377),(378),(379),(380),(381),(382),(383),(384),(385),(386),(387),(388),(389),(390),(391),(392),(393),(394),(395),(396),(397),(398),(399),(400),(401),(402),(403),(404),(405),(406),(407),(408),(409),(410),(411),(412),(413),(414),(415),(416),(417),(418),(419),(420),(421),(422),(423),(424),(425),(426),(427),(428),(429),(430),(431),(432),(433),(434),(435),(436),(437),(438),(439),(440),(441),(442),(443),(444),(445),(446),(447),(448),(449),(450),(451),(452),(453),(454),(455),(456),(457),(458),(459),(460),(461),(462),(463),(464),(465),(466),(467),(468),(469),(470),(471),(472),(473),(474),(475),(476),(477),(478),(479),(480),(481),(482),(483),(484),(485),(486),(487),(488),(489),(490),(491),(492),(493),(494),(495),(496),(497),(498),(499),(500),(501),(502),(503),(504),(505),(506),(507),(508),(509),(510),(511),(512),(513),(514),(515),(516),(517),(518),(519),(520),(521),(522),(523),(524),(525),(526),(527),(528),(529),(530),(531),(532),(533),(534),(535),(536),(537),(538),(539),(540),(541),(542),(543),(544),(545),(546),(547),(548),(549),(550),(551),(552),(553),(554),(555),(556),(557),(558),(559),(560),(561),(562),(563),(564),(565),(566),(567),(568),(569),(570),(571),(572),(573),(574),(575),(576),(577),(578),(579),(580),(581),(582),(583),(584),(585),(586),(587),(588),(589),(590),(591),(592),(593),(594),(595),(596),(597),(598),(599),(600),(601),(602),(603),(604),(605),(606),(607),(608),(609),(610),(611),(612),(613),(614),(615),(616),(617),(618),(619),(620),(621),(622),(623),(624),(625),(626),(627),(628),(629),(630),(631),(632),(633),(634),(635),(636),(637),(638),(639),(640),(641),(642),(643),(644),(645),(646),(647),(648),(649),(650),(651),(652),(653),(654),(655),(656),(657),(658),(659),(660),(661),(662),(663),(664),(665),(666),(667),(668),(669),(670),(671),(672),(673),(674),(675),(676),(677),(678),(679),(680),(681),(682),(683),(684),(685),(686),(687),(688),(689),(690),(691),(692),(693),(694),(695),(696),(697),(698),(699),(700),(701),(702),(703),(704),(705),(706),(707),(708),(709),(710),(711),(712),(713),(714),(715),(716),(717),(718),(719),(720),(721),(722),(723),(724),(725),(726),(727),(728),(729),(730),(731),(732),(733),(734),(735),(736),(737),(738),(739),(740),(741),(742),(743),(744),(745),(746),(747),(748),(749),(750),(751),(752),(753),(754),(755),(756),(757),(758),(759),(760),(761),(762),(763),(764),(765),(766),(767),(768),(769),(770),(771),(772),(773),(774),(775),(776),(777),(778),(779),(780),(781),(782),(783),(784),(785),(786),(787),(788),(789),(790),(791),(792),(793),(794),(795),(796),(797),(798),(799),(800),(801),(802),(803),(804),(805),(806),(807),(808),(809),(810),(811),(812),(813),(814),(815),(816),(817),(818),(819),(820),(821),(822),(823),(824),(825),(826),(827),(828),(829),(830),(831),(832),(833),(834),(835),(836),(837),(838),(839),(840),(841),(842),(843),(844),(845),(846),(847),(848),(849),(850),(851),(852),(853),(854),(855),(856),(857),(858),(859),(860),(861),(862),(863),(864),(865),(866),(867),(868),(869),(870),(871),(872),(873),(874),(875),(876),(877),(878),(879),(880),(881),(882),(883),(884),(885),(886),(887),(888),(889),(890),(891),(892),(893),(894),(895),(896),(897),(898),(899),(900),(901),(902),(903),(904),(905),(906),(907),(908),(909),(910),(911),(912),(913),(914),(915),(916),(917),(918),(919),(920),(921),(922),(923),(924),(925),(926),(927),(928),(929),(930),(931),(932),(933),(934),(935),(936),(937),(938),(939),(940),(941),(942),(943),(944),(945),(946),(947),(948),(949),(950),(951),(952),(953),(954),(955),(956),(957),(958),(959),(960),(961),(962),(963),(964),(965),(966),(967),(968),(969),(970),(971),(972),(973),(974),(975),(976),(977),(978),(979),(980),(981),(982),(983),(984),(985),(986),(987),(988),(989),(990),(991),(992),(993),(994),(995),(996),(997),(998),(999);

• 本机测试时间是 0.24 秒，效率提升 180+ 倍；

2、删除语句

• 删除的合并也是同理；

DELETE FROM tab_char_info WHERE char_id in (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292,293,294,295,296,297,298,299,300,301,302,303,304,305,306,307,308,309,310,311,312,313,314,315,316,317,318,319,320,321,322,323,324,325,326,327,328,329,330,331,332,333,334,335,336,337,338,339,340,341,342,343,344,345,346,347,348,349,350,351,352,353,354,355,356,357,358,359,360,361,362,363,364,365,366,367,368,369,370,371,372,373,374,375,376,377,378,379,380,381,382,383,384,385,386,387,388,389,390,391,392,393,394,395,396,397,398,399,400,401,402,403,404,405,406,407,408,409,410,411,412,413,414,415,416,417,418,419,420,421,422,423,424,425,426,427,428,429,430,431,432,433,434,435,436,437,438,439,440,441,442,443,444,445,446,447,448,449,450,451,452,453,454,455,456,457,458,459,460,461,462,463,464,465,466,467,468,469,470,471,472,473,474,475,476,477,478,479,480,481,482,483,484,485,486,487,488,489,490,491,492,493,494,495,496,497,498,499,500,501,502,503,504,505,506,507,508,509,510,511,512,513,514,515,516,517,518,519,520,521,522,523,524,525,526,527,528,529,530,531,532,533,534,535,536,537,538,539,540,541,542,543,544,545,546,547,548,549,550,551,552,553,554,555,556,557,558,559,560,561,562,563,564,565,566,567,568,569,570,571,572,573,574,575,576,577,578,579,580,581,582,583,584,585,586,587,588,589,590,591,592,593,594,595,596,597,598,599,600,601,602,603,604,605,606,607,608,609,610,611,612,613,614,615,616,617,618,619,620,621,622,623,624,625,626,627,628,629,630,631,632,633,634,635,636,637,638,639,640,641,642,643,644,645,646,647,648,649,650,651,652,653,654,655,656,657,658,659,660,661,662,663,664,665,666,667,668,669,670,671,672,673,674,675,676,677,678,679,680,681,682,683,684,685,686,687,688,689,690,691,692,693,694,695,696,697,698,699,700,701,702,703,704,705,706,707,708,709,710,711,712,713,714,715,716,717,718,719,720,721,722,723,724,725,726,727,728,729,730,731,732,733,734,735,736,737,738,739,740,741,742,743,744,745,746,747,748,749,750,751,752,753,754,755,756,757,758,759,760,761,762,763,764,765,766,767,768,769,770,771,772,773,774,775,776,777,778,779,780,781,782,783,784,785,786,787,788,789,790,791,792,793,794,795,796,797,798,799,800,801,802,803,804,805,806,807,808,809,810,811,812,813,814,815,816,817,818,819,820,821,822,823,824,825,826,827,828,829,830,831,832,833,834,835,836,837,838,839,840,841,842,843,844,845,846,847,848,849,850,851,852,853,854,855,856,857,858,859,860,861,862,863,864,865,866,867,868,869,870,871,872,873,874,875,876,877,878,879,880,881,882,883,884,885,886,887,888,889,890,891,892,893,894,895,896,897,898,899,900,901,902,903,904,905,906,907,908,909,910,911,912,913,914,915,916,917,918,919,920,921,922,923,924,925,926,927,928,929,930,931,932,933,934,935,936,937,938,939,940,941,942,943,944,945,946,947,948,949,950,951,952,953,954,955,956,957,958,959,960,961,962,963,964,965,966,967,968,969,970,971,972,973,974,975,976,977,978,979,980,981,982,983,984,985,986,987,988,989,990,991,992,993,994,995,996,997,998,999);

• 本机测试时间是 0.065 秒，效率提升 680+ 倍；

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