{"id":99,"date":"2018-04-17T21:15:34","date_gmt":"2018-04-17T13:15:34","guid":{"rendered":"http:\/\/yanzhenhua.top\/?p=99"},"modified":"2018-04-17T21:15:34","modified_gmt":"2018-04-17T13:15:34","slug":"mysql%e5%88%86%e8%a1%a8%ef%bc%88%e6%b0%b4%e5%b9%b3%e5%88%86%e8%a1%a8%e5%92%8c%e5%9e%82%e7%9b%b4%e5%88%86%e8%a1%a8%ef%bc%89","status":"publish","type":"post","link":"http:\/\/yanzhenhua.top\/?p=99","title":{"rendered":"mysql\u5206\u8868\uff08\u6c34\u5e73\u5206\u8868\u548c\u5782\u76f4\u5206\u8868\uff09"},"content":{"rendered":"<p>\u4e00\u3001\u6c34\u5e73\u5206\u8868<br \/>\n\u6570\u636e\u6709\u5f88\u591a\u7684\u65f6\u5019\uff0c\u5b58\u50a8\u5728\u591a\u5f20\u8868\u91cc\u9762\uff1b\u8fd9\u4e9b\u8868\u7684\u8868\u7ed3\u6784\u80af\u5b9a\u662f\u4e00\u6a21\u4e00\u6837\u7684\u3002<br \/>\n\u8868\u7ed3\u6784\u4e00\u6a21\u4e00\u6837\u7684\u8868\uff0c\u5728\u5b58\u50a8\u6570\u636e\u7684\u65f6\u5019\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u7406\u89e3\u6210\u6c34\u5e73\u5206\u8868\uff01<\/p>\n<p>\u6570\u636e\u67091000W\u7684\u65f6\u5019\uff0c\u6211\u4eec\u8fdb\u884c\u6c34\u5e73\u5206\u8868\uff1b\u5206\u62102\u5f20\u8868\uff1b<br \/>\n\u7b56\u7565\u4e00\uff1a\u524d500W\u6570\u636e\uff0c\u5206\u5728\u88681\u91cc\u9762\uff1b\u540e500W\u6570\u636e\uff0c\u5206\u5728\u88682\u91cc\u9762\uff1b<br \/>\n\u7b56\u7565\u4e8c\uff1aid\u662f\u5355\u6570\u7684\uff0c\u5206\u5728\u88681\u91cc\u9762\uff1bid\u662f\u53cc\u6570\u7684\uff0c\u5206\u5728\u88682\u91cc\u9762\u3002<\/p>\n<p>\u5b8c\u6210\u7b56\u7565\u4e00\uff1a\u9996\u51481000W\u7684\u6570\u636e\uff1b\u65b0\u589e\u6570\u636e\u3002<br \/>\n    \u8bfb\u53d6\u66fe\u7ecf\u7684\u6570\u636e\uff0c\u8dd1\u524d500W\u5728\u88681\u91cc\u9762\uff1b\u8dd1\u540e500W\u5728\u88682\u91cc\u9762\uff1b<br \/>\n    \u65b0\u589e\u6570\u636e\uff1a\u9700\u8981\u4e00\u76f4\u7ef4\u62a4\u4e00\u4e2aid\u503c\uff0c\u901a\u8fc7id\u503c\u53bb\u5224\u65ad\uff0c\u6211\u4eec\u7684\u6570\u636e\u5e94\u8be5\u5b58\u50a8\u5728\u90a3\u5f20\u8868\u91cc\u9762\u4e86\u3002\u5047\u59821001W\uff0c\u8fd9\u4e2a\u65f6\u5019\u5c31\u5b58\u50a8\u5728\u88683\u91cc\u9762\uff1b\u5230\u8fbe1501W\uff0c\u8fd9\u4e2a\u65f6\u5019\u5c31\u5b58\u50a8\u5728\u88684\u91cc\u9762\u3002<\/p>\n<p>\u67e5\u8be2\u6570\u636e\u7684\u65f6\u5019\uff1a<br \/>\n    \u67e5\u8be2\u6570\u636e\u7684\uff0c\u6211\u4eec\u5fc5\u9700\u7ed9\u6211\u4eec\u7684\u6570\u636e\u7ef4\u62a4\u597did\u503c\uff0c\u67e5\u8be2\u7684\u65f6\u5019\uff0c\u5c3d\u91cf\u4f7f\u7528id\u67e5\u8be2\uff0c\u901a\u8fc7id\u503c\uff0c\u5c31\u80fd\u533a\u5206\u5b83\u5728\u54ea\u4e00\u4e2a\u8868\u91cc\u9762\u4e86\uff01<br \/>\n    merge\u5f15\u64ce\uff1b\u5b83\u53ef\u4ee5\u628amyisam\u5f15\u64ce\u7684\u591a\u5f20\u8868\u8fde\u63a5\u8d77\u6765\uff0c\u4f60\u67e5\u8be2\u7684\u65f6\u5019\uff0c\u76f4\u63a5\u67e5\u8be2\u8fd9\u5f20\u8868\uff0c\u5b83\u5c31\u4f1a\u628a\u6240\u6709\u7684myisam\u5f15\u64ce\u7684\u8868\uff0c\u90fd\u904d\u5386\u4e00\u6b21\uff0c\u8fd9\u6837\u5c31\u83b7\u5f97\u4e86\u6211\u4eec\u7684\u6570\u636e\u3002<br \/>\n    \u975emyisam\u5f15\u64ce\u7684\u8868\uff0c\u5c31\u8981\u4f7f\u7528\u4e2d\u4ef6\u95f4\uff08\u7b2c\u4e09\u65b9\u5de5\u5177\uff09\u5b9e\u73b0\u540cmerge\u5f15\u64ce\u4e00\u6837\u7684\u6548\u679c\uff01<\/p>\n<p>\u5b8c\u6210\u7b56\u7565\u4e8c\uff1a\u9996\u51481000W\u7684\u6570\u636e\uff1b\u65b0\u589e\u6570\u636e\u3002<br \/>\n    \u8bfb\u53d6\u66fe\u7ecf\u7684\u6570\u636e\uff0c\u8dd1\u6570\u636eid\uff0cid\u662f\u5355\u6570\u7684\u5c31\u5b58\u50a8\u5728\u88681\u91cc\u9762\uff1b\u8dd1\u6570\u636eid\uff0cid\u662f\u53cc\u6570\u7684\u5c31\u5b58\u50a8\u5728\u88682\u91cc\u9762\u3002<br \/>\n    \u65b0\u589e\u6570\u636e\uff1a\u9700\u8981\u4e00\u76f4\u7ef4\u62a4\u4e00\u4e2aid\u503c\uff0c\u901a\u8fc7id\u503c\u53bb\u5224\u65ad\uff0c \u53ea\u8981id\u662f\u5355\u6570\u5c31\u5b58\u50a8\u5728\u88681\u91cc\u9762\uff1bid\u662f\u53cc\u6570\u5c31\u5b58\u50a8\u5728\u88682\u91cc\u9762\u3002<\/p>\n<p>\u7b56\u7565\u4e8c\uff0c\u4fee\u6539\u62105\u5f20\u8868\u7684\u65f6\u5019\uff1a\u5b8c\u6210\u5b83\u7684\u65b9\u5f0f\u5c31\u662f\u53d6\u4f59\uff01<\/p>\n<p>\u9762\u8bd5\u5e38\u8003\uff1a\u6709\u4e00\u4e2a\u7528\u6237\u4fe1\u606f\u8868\uff0c\u6570\u636e\u91cf\u6709\u70b9\u5927\u4e86\uff0c\u6211\u4eec\u8981\u8fdb\u884c\u5206\u8868\uff0c\u5e94\u8be5\u600e\u4e48\u5212\u5206\uff01<br \/>\n    \u4ee4\u65fa\uff1a\u6027\u522b\uff1b\u5fd7\u5f3a\uff1a\u7c4d\u8d2f\uff1b\u6653\u7ea2\uff1aid\uff1b\u5f90\u98de\uff1a\u5e74\u9f84\u3002<\/p>\n<pre class=\"prism-highlight line-numbers\" data-start=\"1\"><code class=\"language-null\">\u7528\u6237\u4fe1\u606f\u8868\uff1a\n<\/code><\/pre>\n<p>1\uff09\u65b0\u7528\u6237\u6ce8\u518c\u7684\u65f6\u5019\uff0c\u6ce8\u518c\u4fe1\u606f<br \/>\n2\uff09\u7528\u6237\u767b\u5f55\u7684\u65f6\u5019\uff0c\u767b\u5f55\u83b7\u5f97\u4fe1\u606f<br \/>\n\u7528\u6237\u4fe1\u606f\u8868\uff0c\u7ecf\u5e38\u90fd\u662f\u56de\u7b54\u4f7f\u7528\u7528\u6237\u540d\u8fdb\u884c\u5212\u5206\u7684\u3002<br \/>\n    \u7528\u6237\u540d\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u901a\u8fc7hash\u8f6c\u6210\u6574\u578b\uff0c\u6574\u578b\u5728\u8fdb\u884c\u53d6\u4f59\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<p>\u8981\u62ff\u7684\u503c\uff0c\u4e00\u5b9a\u662f\u5c3d\u91cf\u662f\u552f\u4e00\u7684\uff0c\u4e0d\u8981\u91cd\u590d\u7684\uff0c\u4e0d\u53ef\u4fee\u6539\u7684\u3002<\/p>\n<p>\u65b0\u65e5\u4efb\u52a1\uff1a\u5b8c\u6210\u7b56\u7565\u4e8c\uff01<br \/>\n\u5206\u8868\u7684\u6570\u636e\u5148\u5b9a\u4e49\u597d\uff1a2\u5f20\u8868\uff1b<br \/>\n\u5206\u8868\u7684\u7b97\u6cd5\u8981\u5b9a\u4e49\u597d\uff1aid\u8fdb\u884c\u53d6\u4f59<\/p>\n<p>\u901a\u8fc7\u7b97\u6cd5\uff0c\u5c31\u4f1a\u53d1\u73b0\u8868\u540d\u53ef\u4ee5\u8bbe\u8ba1\u7684\u6709\u70b9\u610f\u601d\uff1a<br \/>\nid = 3\uff1b<br \/>\n  3 % 2 = 1\uff1b<br \/>\nid = 4\uff1b<br \/>\n  4 % 2 = 0\uff1b<br \/>\n\u503c\uff0c\u53ea\u67090\u6216\u8005\u662f1\uff1b<\/p>\n<p>\u786e\u5b9a\u4e00\u4e2a\u8868\u524d\u7f00\uff0c\u7136\u540e\u52a0\u4e0a\u8fd9\u4e2a\u53d6\u4f59\u7684\u7ed3\u679c\uff0c\u5c31\u53ef\u4ee5\u7ec4\u88c5\u6210\u8868\u540d\uff01<br \/>\n\u8868\u524d\u7f00\u662f:goods_   ; \u53d6\u4f59\u7ed3\u679c\uff1a0 ;\u7ec4\u88c5 \uff1agoods_0\uff08\u8868\u540d\uff09<br \/>\n1\uff09\u521b\u5efa\u597d\u4e8c\u5f20\u8868\uff1a<br \/>\n<img decoding=\"async\" src=\"http:\/\/yanzhenhua.top\/wp-content\/uploads\/2018\/04\/625b0abcca8dfebab2088bb81f2859e2.png\" alt=\"\" \/><br \/>\n2\uff09\u7ef4\u62a4id\u7684\u8868\uff1a\u8fd9\u4e2aid\u4e00\u5b9a\u8981\u662f\u81ea\u589e\u957f\u7684\uff01<br \/>\n<img decoding=\"async\" src=\"http:\/\/yanzhenhua.top\/wp-content\/uploads\/2018\/04\/2ec2fbcbcef4ab8fb9917084aa9c602e.png\" alt=\"\" \/><br \/>\n\u63d2\u5165\u6570\u636e\uff1a<br \/>\n<img decoding=\"async\" src=\"http:\/\/yanzhenhua.top\/wp-content\/uploads\/2018\/04\/2afeff6c74401298ff76f675cbe5c7d9.png\" alt=\"\" \/><br \/>\n\u6211\u4eec\u8ba9\u8fd9\u4e2a\u8868\u7684id\u4e00\u76f4\u589e\u957f\u4e0a\u53bb\uff0c\u628a\u8fd9\u4e2a\u589e\u957f\u7684id\u53d6\u51fa\u6765\uff0c\u505a\u4e3a\u6211\u4eec\u7684id\u6765\u5224\u65ad\u5c31\u53ef\u4ee5\u4e86\u3002<br \/>\n3\uff09\u4ee3\u7801\u5b9e\u73b0\uff1a<br \/>\n<img decoding=\"async\" src=\"http:\/\/yanzhenhua.top\/wp-content\/uploads\/2018\/04\/5f94dd96b2a73db99de3d0fdf4d8c9ec.png\" alt=\"\" \/><br \/>\n<img decoding=\"async\" src=\"http:\/\/yanzhenhua.top\/wp-content\/uploads\/2018\/04\/17d9e049164e024f01803e184c8b9aef.png\" alt=\"\" \/><br \/>\n\u8bbf\u95ee\u51e0\u6b21\uff1a<br \/>\n\u67e5\u770b\u6570\u636e\u5e93\u7684\u60c5\u51b5\uff1a<br \/>\n<img decoding=\"async\" src=\"http:\/\/yanzhenhua.top\/wp-content\/uploads\/2018\/04\/17d9e049164e024f01803e184c8b9aef.png\" alt=\"\" \/><br \/>\n4\uff09\u53d1\u73b0\u4e00\u4e2a\u95ee\u9898\uff1agoods_id_incr<br \/>\n\u8868\u7684\u6570\u636e\u662f4\u6761\uff1b\u4ee5\u540e\u4f1a\u662f\u591a\u5c11\u6761\uff1f<br \/>\n    \u8fd9\u4e9b\u6570\u636e\uff0c\u53ea\u662f\u5728\u7ec4\u88c5id\u7684\u65f6\u5019\uff0c\u6709\u7528\u3002\u4e4b\u540e\u90fd\u5c06\u6ca1\u6709\u4f5c\u7528\u3002\u6240\u4ee5\u6211\u4eec\u5e94\u8be5\u6e05\u7a7a\u5b83\uff01<br \/>\ndelete from goods_id_incr;\uff1a\u6e05\u7a7a\u8868\u6570\u636e\uff0c\u4e0d\u6e05\u7a7a\u81ea\u52a8\u589e\u957f\uff01<br \/>\ntruncate goods_id_incr : \u6e05\u7a7a\u8868\u6570\u636e\uff0c\u5e76\u4e14\u628a\u81ea\u52a8\u589e\u957f\u6e05\u7a7a\uff0c\u6240\u6709\u4e0d\u80fd\u4f7f\u7528\u5b83\u3002<\/p>\n<p>\u4e8c\u3001\u5782\u76f4\u5206\u8868<br \/>\n\u8868\u91cc\u9762\u6709\u5f88\u591a\u5b57\u6bb5\uff0c\u6709\u4e00\u4e9b\u662f\u5e38\u7528\u7684\uff0c\u6709\u4e00\u4e9b\u662f\u4e0d\u5e38\u7528\u7684\u3002<br \/>\n\u628a\u5e38\u7528\u7684\u5206\u6210\u4e00\u5f20\u8868\uff0c\u628a\u4e0d\u5e38\u7528\u7684\u5206\u6210\u4e00\u5f20\u8868\u3002<\/p>\n<p>\u5047\u5982\uff1a\u7528\u6237\u8868<br \/>\nid  name  age  sex  phone email  wechat  address  content  &#8230;..<\/p>\n<p>\u5e38\u7528\u7684\uff1a<br \/>\nid  name  age  sex  phone email  wechat<\/p>\n<p>\u4e0d\u5e38\u7528\u7684\uff1a<br \/>\nid  fid  address  content  &#8230;..<\/p>\n<p>\u8865\u5145\u8bf4\u660e\uff1a\u5782\u76f4\u5206\u8868\u7684\u771f\u5b9e\u5185\u6db5<br \/>\n    \u6211\u4eec\u7684\u6570\u636e\u662f\u5b58\u50a8\u5230\u786c\u76d8\u91cc\u9762\u7684\uff0c\u90a3\u4e48\u4e00\u884c\u6570\u636e\u7684\u5185\u5bb9\u90fd\u662f\u5b58\u50a8\u5728\u4e00\u8d77\u7684\u3002\u800cIO\u4e00\u6b21\u6027\u8bfb\u53d6\u7684\u6570\u636e\uff0c\u4e5f\u662f\u6574\u5757\u8bfb\u53d6\u7684\u3002\u5f53io\u8bfb\u53d6\u4e00\u6b21\u7684\u65f6\u5019\uff0c\u91cc\u9762\u6709\u5f88\u591a\u6570\u636e\uff0c\u662f\u4e0d\u9700\u8981\u7684\u3002\u8fd9\u6b21\u8bfb\u53d6\u5c31\u6d6a\u8d39\u592a\u591a\u8d44\u6e90\u3002<br \/>\n    \u8fdb\u884c\u5782\u76f4\u5206\u8868\u3002\u90a3\u4e00\u884c\u6570\u636e\u91cc\u9762\uff0c\u90fd\u662f\u9700\u8981\u7684\u3002\u73b0\u5728IO\u4e00\u6b21\u6027\u8bfb\u53d6\u51fa\u6765\u7684\u5185\u5bb9\uff0c\u90fd\u662f\u9700\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u6c34\u5e73\u5206\u8868 \u6570\u636e\u6709\u5f88\u591a\u7684\u65f6\u5019\uff0c\u5b58\u50a8\u5728\u591a\u5f20\u8868\u91cc\u9762\uff1b\u8fd9\u4e9b\u8868\u7684\u8868\u7ed3\u6784\u80af\u5b9a\u662f\u4e00\u6a21\u4e00\u6837\u7684\u3002 \u8868\u7ed3\u6784\u4e00\u6a21\u4e00\u6837\u7684&hellip; <a href=\"http:\/\/yanzhenhua.top\/?p=99\" class=\"more-link read-more\" rel=\"bookmark\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">mysql\u5206\u8868\uff08\u6c34\u5e73\u5206\u8868\u548c\u5782\u76f4\u5206\u8868\uff09<\/span><i class=\"fa fa-arrow-right\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":{"0":"post-99","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-mysql","7":"h-entry","9":"h-as-article"},"_links":{"self":[{"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=\/wp\/v2\/posts\/99","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=99"}],"version-history":[{"count":0,"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=\/wp\/v2\/posts\/99\/revisions"}],"wp:attachment":[{"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=99"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=99"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=99"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}