{"id":76638,"date":"2024-10-16T08:33:19","date_gmt":"2024-10-16T00:33:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76638\/"},"modified":"2024-10-16T08:33:19","modified_gmt":"2024-10-16T00:33:19","slug":"mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e5%be%aa%e7%92%b0%ef%bc%9a%e6%8e%8c%e6%8f%a1%e5%be%aa%e7%92%b0%e8%aa%9e%e5%8f%a5%ef%bc%8c%e8%bc%95%e9%ac%86%e9%ab%98%e6%95%88%e8%99%95%e7%90%86%e6%95%b8%e6%93%9a-mysq","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76638\/","title":{"rendered":"MySQL\u6578\u64da\u5eab\u5faa\u74b0\uff1a\u638c\u63e1\u5faa\u74b0\u8a9e\u53e5\uff0c\u8f15\u9b06\u9ad8\u6548\u8655\u7406\u6578\u64da (MySQL\u6578\u64da\u5eab\u5faa\u74b0)"},"content":{"rendered":"<h1 id=\"mysql%e6%95%b8%e6%93%9a%e5%ba%ab%e5%be%aa%e7%92%b0%ef%bc%9a%e6%8e%8c%e6%8f%a1%e5%be%aa%e7%92%b0%e8%aa%9e%e5%8f%a5%ef%bc%8c%e8%bc%95%e9%ac%86%e9%ab%98%e6%95%88%e8%99%95%e7%90%86%e6%95%b8%e6%93%9a-rkimBdEXVh\">MySQL\u6578\u64da\u5eab\u5faa\u74b0\uff1a\u638c\u63e1\u5faa\u74b0\u8a9e\u53e5\uff0c\u8f15\u9b06\u9ad8\u6548\u8655\u7406\u6578\u64da<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7576\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u5faa\u74b0\u8a9e\u53e5\u7684\u4f7f\u7528\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u4e2d\u7684\u5faa\u74b0\u8a9e\u53e5\uff0c\u5e6b\u52a9\u8b80\u8005\u638c\u63e1\u5982\u4f55\u9ad8\u6548\u5730\u8655\u7406\u6578\u64da\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%be%aa%e7%92%b0%e8%aa%9e%e5%8f%a5%ef%bc%9f-rkimBdEXVh\">\u4ec0\u9ebc\u662f\u5faa\u74b0\u8a9e\u53e5\uff1f<\/h2>\n<p>\u5faa\u74b0\u8a9e\u53e5\u662f\u4e00\u7a2e\u63a7\u5236\u7d50\u69cb\uff0c\u5141\u8a31\u91cd\u8907\u57f7\u884c\u4e00\u6bb5\u4ee3\u78bc\uff0c\u76f4\u5230\u6eff\u8db3\u7279\u5b9a\u689d\u4ef6\u70ba\u6b62\u3002\u5728MySQL\u4e2d\uff0c\u5faa\u74b0\u8a9e\u53e5\u4e3b\u8981\u7528\u65bc\u5b58\u5132\u904e\u7a0b\u4e2d\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u5728\u8655\u7406\u6578\u64da\u6642\u9032\u884c\u91cd\u8907\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"mysql%e4%b8%ad%e7%9a%84%e5%be%aa%e7%92%b0%e8%aa%9e%e5%8f%a5%e9%a1%9e%e5%9e%8b-rkimBdEXVh\">MySQL\u4e2d\u7684\u5faa\u74b0\u8a9e\u53e5\u985e\u578b<\/h2>\n<p>MySQL\u652f\u6301\u5e7e\u7a2e\u4e0d\u540c\u985e\u578b\u7684\u5faa\u74b0\u8a9e\u53e5\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>WHILE\u5faa\u74b0\uff1a<\/strong>\u7576\u689d\u4ef6\u70ba\u771f\u6642\uff0c\u91cd\u8907\u57f7\u884c\u4ee3\u78bc\u584a\u3002<\/li>\n<li><strong>REPEAT\u5faa\u74b0\uff1a<\/strong>\u5148\u57f7\u884c\u4ee3\u78bc\u584a\uff0c\u7136\u5f8c\u6aa2\u67e5\u689d\u4ef6\uff0c\u76f4\u5230\u689d\u4ef6\u70ba\u5047\u70ba\u6b62\u3002<\/li>\n<li><strong>LOOP\u5faa\u74b0\uff1a<\/strong>\u7121\u689d\u4ef6\u5730\u91cd\u8907\u57f7\u884c\u4ee3\u78bc\u584a\uff0c\u76f4\u5230\u9047\u5230EXIT\u8a9e\u53e5\u3002<\/li>\n<\/ul>\n<h2 id=\"while%e5%be%aa%e7%92%b0%e7%a4%ba%e4%be%8b-rkimBdEXVh\">WHILE\u5faa\u74b0\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528WHILE\u5faa\u74b0\u7684\u793a\u4f8b\uff0c\u8a72\u793a\u4f8b\u8a08\u7b97\u5f9e1\u523010\u7684\u7e3d\u548c\uff1a<\/p>\n<pre><code>\nDELIMITER \/\/\nCREATE PROCEDURE SumNumbers()\nBEGIN\n    DECLARE total INT DEFAULT 0;\n    DECLARE counter INT DEFAULT 1;\n\n    WHILE counter &lt;= 10 DO\n        SET total = total + counter;\n        SET counter = counter + 1;\n    END WHILE;\n\n    SELECT total AS TotalSum;\nEND \/\/\nDELIMITER ;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u540d\u70baSumNumbers\u7684\u5b58\u5132\u904e\u7a0b\uff0c\u4f7f\u7528WHILE\u5faa\u74b0\u4f86\u8a08\u7b97\u7e3d\u548c\u3002\u7576\u8a08\u6578\u5668\u5c0f\u65bc\u6216\u7b49\u65bc10\u6642\uff0c\u5faa\u74b0\u5c07\u7e7c\u7e8c\u57f7\u884c\u3002<\/p>\n<h2 id=\"repeat%e5%be%aa%e7%92%b0%e7%a4%ba%e4%be%8b-rkimBdEXVh\">REPEAT\u5faa\u74b0\u793a\u4f8b<\/h2>\n<p>\u63a5\u4e0b\u4f86\u662f\u4e00\u500b\u4f7f\u7528REPEAT\u5faa\u74b0\u7684\u793a\u4f8b\uff0c\u8a72\u793a\u4f8b\u5c07\u5f9e1\u523010\u7684\u6578\u5b57\u6253\u5370\u51fa\u4f86\uff1a<\/p>\n<pre><code>\nDELIMITER \/\/\nCREATE PROCEDURE PrintNumbers()\nBEGIN\n    DECLARE counter INT DEFAULT 1;\n\n    REPEAT\n        SELECT counter;\n        SET counter = counter + 1;\n    UNTIL counter &gt; 10\n    END REPEAT;\nEND \/\/\nDELIMITER ;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0cREPEAT\u5faa\u74b0\u5c07\u5728\u6253\u5370\u6578\u5b57\u5f8c\u6aa2\u67e5\u689d\u4ef6\uff0c\u76f4\u5230\u8a08\u6578\u5668\u5927\u65bc10\u70ba\u6b62\u3002<\/p>\n<h2 id=\"loop%e5%be%aa%e7%92%b0%e7%a4%ba%e4%be%8b-rkimBdEXVh\">LOOP\u5faa\u74b0\u793a\u4f8b<\/h2>\n<p>\u6700\u5f8c\uff0c\u6211\u5011\u4f86\u770b\u770bLOOP\u5faa\u74b0\u7684\u793a\u4f8b\uff0c\u9019\u500b\u793a\u4f8b\u5c07\u8a08\u7b97\u5f9e1\u52305\u7684\u5e73\u65b9\uff1a<\/p>\n<pre><code>\nDELIMITER \/\/\nCREATE PROCEDURE SquareNumbers()\nBEGIN\n    DECLARE counter INT DEFAULT 1;\n\n    loop_label: LOOP\n        IF counter &gt; 5 THEN\n            LEAVE loop_label;\n        END IF;\n\n        SELECT counter * counter AS Square;\n        SET counter = counter + 1;\n    END LOOP;\nEND \/\/\nDELIMITER ;\n<\/code><\/pre>\n<p>\u9019\u500b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528LOOP\u5faa\u74b0\u4f86\u8a08\u7b97\u5e73\u65b9\uff0c\u4e26\u4f7f\u7528LEAVE\u8a9e\u53e5\u4f86\u9000\u51fa\u5faa\u74b0\u3002<\/p>\n<h2 id=\"%e5%be%aa%e7%92%b0%e8%aa%9e%e5%8f%a5%e7%9a%84%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-rkimBdEXVh\">\u5faa\u74b0\u8a9e\u53e5\u7684\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u4f7f\u7528\u5faa\u74b0\u8a9e\u53e5\u6642\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u5faa\u74b0\u689d\u4ef6\u80fd\u5920\u5728\u5408\u7406\u7684\u6642\u9593\u5167\u6eff\u8db3\uff0c\u4ee5\u907f\u514d\u7121\u9650\u5faa\u74b0\u3002<\/li>\n<li>\u4f7f\u7528\u9069\u7576\u7684\u6578\u64da\u985e\u578b\u4f86\u5b58\u5132\u8a08\u6578\u5668\u548c\u5176\u4ed6\u8b8a\u91cf\uff0c\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li>\u5728\u5faa\u74b0\u5167\u90e8\u9032\u884c\u5fc5\u8981\u7684\u932f\u8aa4\u8655\u7406\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-rkimBdEXVh\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1MySQL\u4e2d\u7684\u5faa\u74b0\u8a9e\u53e5\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u9ad8\u6548\u5730\u8655\u7406\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\u7121\u8ad6\u662f\u4f7f\u7528WHILE\u3001REPEAT\u9084\u662fLOOP\u5faa\u74b0\uff0c\u4e86\u89e3\u5176\u7279\u6027\u548c\u7528\u6cd5\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u5982<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1MySQL\u6578\u64da\u5eab\u5faa\u74b0\u8a9e\u53e5\uff0c\u8f15\u9b06\u9ad8\u6548\u8655\u7406\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u64cd\u4f5c\u6548\u7387\uff0c\u8b93\u6578\u64da\u7ba1\u7406\u66f4\u7c21\u55ae\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-76638","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76638","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=76638"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76638\/revisions"}],"predecessor-version":[{"id":76639,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76638\/revisions\/76639"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}