{"id":168515,"date":"2024-11-06T13:01:22","date_gmt":"2024-11-06T05:01:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168515\/"},"modified":"2024-11-06T13:01:23","modified_gmt":"2024-11-06T05:01:23","slug":"sql-%e4%b8%ad-while-%e8%aa%9e%e5%8f%a5%e5%a4%9a%e5%b1%a4%e5%be%aa%e7%92%b0%e5%af%a6%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168515\/","title":{"rendered":"SQL \u4e2d WHILE \u8a9e\u53e5\u591a\u5c64\u5faa\u74b0\u5be6\u4f8b"},"content":{"rendered":"<h1 id=\"sql-%e4%b8%ad-while-%e8%aa%9e%e5%8f%a5%e5%a4%9a%e5%b1%a4%e5%be%aa%e7%92%b0%e5%af%a6%e4%be%8b-ykzsHLRHWJ\">SQL \u4e2d WHILE \u8a9e\u53e5\u591a\u5c64\u5faa\u74b0\u5be6\u4f8b<\/h1>\n<p>\u5728 SQL \u4e2d\uff0cWHILE \u8a9e\u53e5\u662f\u4e00\u7a2e\u63a7\u5236\u6d41\u7a0b\u7684\u8a9e\u53e5\uff0c\u5141\u8a31\u6211\u5011\u5728\u6eff\u8db3\u7279\u5b9a\u689d\u4ef6\u7684\u60c5\u6cc1\u4e0b\u91cd\u8907\u57f7\u884c\u4e00\u6bb5\u7a0b\u5f0f\u78bc\u3002\u9019\u7a2e\u8a9e\u53e5\u5728\u8655\u7406\u9700\u8981\u91cd\u8907\u8a08\u7b97\u6216\u8fed\u4ee3\u7684\u60c5\u6cc1\u4e0b\u975e\u5e38\u6709\u7528\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u591a\u5c64\u5faa\u74b0\u7684\u60c5\u5883\u4e2d\u3002\u672c\u6587\u5c07\u63a2\u8a0e SQL \u4e2d WHILE \u8a9e\u53e5\u7684\u591a\u5c64\u5faa\u74b0\u5be6\u4f8b\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u7bc4\u4f8b\u4ee3\u78bc\u4ee5\u5e6b\u52a9\u7406\u89e3\u3002<\/p>\n<h2 id=\"while-%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-ykzsHLRHWJ\">WHILE \u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>WHILE \u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>\nWHILE (\u689d\u4ef6)\nBEGIN\n    -- \u57f7\u884c\u7684 SQL \u8a9e\u53e5\nEND\n<\/code><\/pre>\n<p>\u7576\u689d\u4ef6\u70ba\u771f\u6642\uff0cWHILE \u5167\u90e8\u7684 SQL \u8a9e\u53e5\u5c07\u88ab\u57f7\u884c\uff0c\u76f4\u5230\u689d\u4ef6\u8b8a\u70ba\u5047\u70ba\u6b62\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e5%b1%a4%e5%be%aa%e7%92%b0%e7%9a%84%e6%a6%82%e5%bf%b5-ykzsHLRHWJ\">\u591a\u5c64\u5faa\u74b0\u7684\u6982\u5ff5<\/h2>\n<p>\u591a\u5c64\u5faa\u74b0\u662f\u6307\u5728\u4e00\u500b WHILE \u5faa\u74b0\u5167\u90e8\u518d\u5d4c\u5957\u4e00\u500b\u6216\u591a\u500b WHILE \u5faa\u74b0\u3002\u9019\u5728\u8655\u7406\u591a\u7dad\u6578\u64da\u7d50\u69cb\u6216\u9700\u8981\u9032\u884c\u591a\u6b21\u8fed\u4ee3\u7684\u60c5\u6cc1\u4e0b\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u7576\u6211\u5011\u9700\u8981\u904d\u6b77\u4e00\u500b\u4e8c\u7dad\u6578\u7d44\u6216\u9032\u884c\u8907\u96dc\u7684\u8a08\u7b97\u6642\uff0c\u591a\u5c64\u5faa\u74b0\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u9054\u6210\u76ee\u6a19\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e5%b1%a4%e5%be%aa%e7%92%b0%e7%9a%84%e5%af%a6%e4%be%8b-ykzsHLRHWJ\">\u591a\u5c64\u5faa\u74b0\u7684\u5be6\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 WHILE \u8a9e\u53e5\u9032\u884c\u591a\u5c64\u5faa\u74b0\u7684\u7bc4\u4f8b\u3002\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5c07\u5275\u5efa\u4e00\u500b\u7c21\u55ae\u7684\u4e58\u6cd5\u8868\uff1a<\/p>\n<pre><code>\nDECLARE @i INT = 1;\nDECLARE @j INT;\n\nWHILE @i &lt;= 10\nBEGIN\n    SET @j = 1;\n    WHILE @j &lt;= 10\n    BEGIN\n        PRINT CAST(@i AS VARCHAR(2)) + ' * ' + CAST(@j AS VARCHAR(2)) + ' = ' + CAST(@i * @j AS VARCHAR(3));\n        SET @j = @j + 1;\n    END\n    SET @i = @i + 1;\nEND\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u5916\u5c64\u5faa\u74b0\u63a7\u5236\u8b8a\u6578 @i \u5f9e 1 \u5230 10\uff0c\u5167\u5c64\u5faa\u74b0\u63a7\u5236\u8b8a\u6578 @j \u4e5f\u5f9e 1 \u5230 10\u3002\u6bcf\u6b21\u5167\u5c64\u5faa\u74b0\u57f7\u884c\u6642\uff0c\u6211\u5011\u90fd\u6703\u8a08\u7b97 @i \u548c @j \u7684\u4e58\u7a4d\u4e26\u8f38\u51fa\u7d50\u679c\u3002\u6700\u7d42\uff0c\u6211\u5011\u5c07\u5f97\u5230\u4e00\u500b 10&#215;10 \u7684\u4e58\u6cd5\u8868\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-ykzsHLRHWJ\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528 WHILE \u8a9e\u53e5\u6642\uff0c\u9700\u8981\u7279\u5225\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u5faa\u74b0\u689d\u4ef6\u6700\u7d42\u6703\u8b8a\u70ba\u5047\uff0c\u5426\u5247\u5c07\u5c0e\u81f4\u7121\u9650\u5faa\u74b0\u3002<\/li>\n<li>\u5728\u6bcf\u6b21\u5faa\u74b0\u4e2d\uff0c\u9069\u7576\u5730\u66f4\u65b0\u63a7\u5236\u8b8a\u6578\uff0c\u4ee5\u907f\u514d\u7121\u9650\u5faa\u74b0\u7684\u767c\u751f\u3002<\/li>\n<li>\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u904e\u591a\u7684\u5faa\u74b0\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u8b39\u614e\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ykzsHLRHWJ\">\u7e3d\u7d50<\/h2>\n<p>WHILE \u8a9e\u53e5\u5728 SQL \u4e2d\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u9032\u884c\u591a\u5c64\u5faa\u74b0\u7684\u60c5\u6cc1\u4e0b\u3002\u901a\u904e\u9069\u7576\u7684\u4f7f\u7528 WHILE \u8a9e\u53e5\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u8655\u7406\u8907\u96dc\u7684\u6578\u64da\u8a08\u7b97\u548c\u64cd\u4f5c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u7684\u6578\u64da\u8655\u7406\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u7121\u8ad6\u662f\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u90fd\u80fd\u70ba\u60a8\u7684\u6578\u64da\u8655\u7406\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 SQL \u4e2d WHILE \u8a9e\u53e5\u7684\u591a\u5c64\u5faa\u74b0\u5be6\u4f8b\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u8655\u7406\u8907\u96dc\u6578\u64da\u64cd\u4f5c\u548c\u908f\u8f2f\u63a7\u5236\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-168515","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168515","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=168515"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168515\/revisions"}],"predecessor-version":[{"id":168516,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168515\/revisions\/168516"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=168515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=168515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=168515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}