{"id":60629,"date":"2024-10-13T04:27:15","date_gmt":"2024-10-12T20:27:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60629\/"},"modified":"2024-10-13T04:27:15","modified_gmt":"2024-10-12T20:27:15","slug":"db2%e6%95%b8%e6%93%9a%e8%a1%a8%e8%88%87%e8%a6%96%e5%9c%96%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a%e7%9a%84%e8%a9%b3%e7%b4%b0%e6%93%8d%e4%bd%9c%e6%b5%81%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60629\/","title":{"rendered":"DB2\u6578\u64da\u8868\u8207\u8996\u5716\u67e5\u8a62\u6578\u64da\u7684\u8a73\u7d30\u64cd\u4f5c\u6d41\u7a0b"},"content":{"rendered":"<h1 id=\"db2%e6%95%b8%e6%93%9a%e8%a1%a8%e8%88%87%e8%a6%96%e5%9c%96%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a%e7%9a%84%e8%a9%b3%e7%b4%b0%e6%93%8d%e4%bd%9c%e6%b5%81%e7%a8%8b-gsabllHvBw\">DB2\u6578\u64da\u8868\u8207\u8996\u5716\u67e5\u8a62\u6578\u64da\u7684\u8a73\u7d30\u64cd\u4f5c\u6d41\u7a0b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cIBM\u7684DB2\u662f\u4e00\u500b\u5f37\u5927\u7684\u9078\u64c7\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u4f01\u696d\u7d1a\u61c9\u7528\u4e2d\u3002DB2\u652f\u6301\u591a\u7a2e\u6578\u64da\u64cd\u4f5c\uff0c\u5305\u62ec\u6578\u64da\u8868\u548c\u8996\u5716\u7684\u67e5\u8a62\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39\u5982\u4f55\u5728DB2\u4e2d\u67e5\u8a62\u6578\u64da\u8868\u548c\u8996\u5716\u7684\u64cd\u4f5c\u6d41\u7a0b\u3002<\/p>\n<h2 id=\"%e4%b8%80%e3%80%81db2%e6%95%b8%e6%93%9a%e8%a1%a8%e7%9a%84%e6%9f%a5%e8%a9%a2-gsabllHvBw\">\u4e00\u3001DB2\u6578\u64da\u8868\u7684\u67e5\u8a62<\/h2>\n<p>\u6578\u64da\u8868\u662fDB2\u4e2d\u5b58\u5132\u6578\u64da\u7684\u57fa\u672c\u7d50\u69cb\u3002\u67e5\u8a62\u6578\u64da\u8868\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT \u5217\u540d1, \u5217\u540d2 FROM \u8868\u540d WHERE \u689d\u4ef6;<\/code><\/pre>\n<h3 id=\"1-1-%e5%9f%ba%e6%9c%ac%e6%9f%a5%e8%a9%a2%e7%a4%ba%e4%be%8b-gsabllHvBw\">1.1 \u57fa\u672c\u67e5\u8a62\u793a\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201c\u54e1\u5de5\u201d\u7684\u6578\u64da\u8868\uff0c\u5305\u542b\u201c\u59d3\u540d\u201d\u3001\u201c\u5e74\u9f61\u201d\u548c\u201c\u90e8\u9580\u201d\u4e09\u500b\u5b57\u6bb5\u3002\u8981\u67e5\u8a62\u6240\u6709\u54e1\u5de5\u7684\u59d3\u540d\u548c\u5e74\u9f61\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT \u59d3\u540d, \u5e74\u9f61 FROM \u54e1\u5de5;<\/code><\/pre>\n<h3 id=\"1-2-%e4%bd%bf%e7%94%a8%e6%a2%9d%e4%bb%b6%e6%9f%a5%e8%a9%a2-gsabllHvBw\">1.2 \u4f7f\u7528\u689d\u4ef6\u67e5\u8a62<\/h3>\n<p>\u5982\u679c\u6211\u5011\u53ea\u60f3\u67e5\u8a62\u5e74\u9f61\u5927\u65bc30\u6b72\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u5728\u67e5\u8a62\u4e2d\u6dfb\u52a0\u689d\u4ef6\uff1a<\/p>\n<pre><code>SELECT \u59d3\u540d, \u5e74\u9f61 FROM \u54e1\u5de5 WHERE \u5e74\u9f61 &gt; 30;<\/code><\/pre>\n<h3 id=\"1-3-%e6%8e%92%e5%ba%8f%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c-gsabllHvBw\">1.3 \u6392\u5e8f\u67e5\u8a62\u7d50\u679c<\/h3>\n<p>\u53ef\u4ee5\u4f7f\u7528ORDER BY\u5b50\u53e5\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002\u4f8b\u5982\uff0c\u6309\u5e74\u9f61\u5347\u5e8f\u6392\u5217\uff1a<\/p>\n<pre><code>SELECT \u59d3\u540d, \u5e74\u9f61 FROM \u54e1\u5de5 ORDER BY \u5e74\u9f61 ASC;<\/code><\/pre>\n<h2 id=\"%e4%ba%8c%e3%80%81db2%e8%a6%96%e5%9c%96%e7%9a%84%e6%9f%a5%e8%a9%a2-gsabllHvBw\">\u4e8c\u3001DB2\u8996\u5716\u7684\u67e5\u8a62<\/h2>\n<p>\u8996\u5716\u662f\u57fa\u65bc\u4e00\u500b\u6216\u591a\u500b\u6578\u64da\u8868\u7684\u865b\u64ec\u8868\u3002\u5b83\u4e0d\u5b58\u5132\u6578\u64da\uff0c\u800c\u662f\u5b58\u5132\u67e5\u8a62\u3002\u67e5\u8a62\u8996\u5716\u7684\u8a9e\u6cd5\u8207\u67e5\u8a62\u6578\u64da\u8868\u76f8\u4f3c\uff1a<\/p>\n<pre><code>SELECT \u5217\u540d1, \u5217\u540d2 FROM \u8996\u5716\u540d WHERE \u689d\u4ef6;<\/code><\/pre>\n<h3 id=\"2-1-%e5%89%b5%e5%bb%ba%e8%a6%96%e5%9c%96-gsabllHvBw\">2.1 \u5275\u5efa\u8996\u5716<\/h3>\n<p>\u5728\u67e5\u8a62\u8996\u5716\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5275\u5efa\u4e00\u500b\u8996\u5716\u3002\u5047\u8a2d\u6211\u5011\u60f3\u5275\u5efa\u4e00\u500b\u53ea\u986f\u793a\u90e8\u9580\u70ba\u201cIT\u201d\u7684\u54e1\u5de5\u7684\u8996\u5716\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE VIEW IT\u54e1\u5de5 AS SELECT \u59d3\u540d, \u5e74\u9f61 FROM \u54e1\u5de5 WHERE \u90e8\u9580 = 'IT';<\/code><\/pre>\n<h3 id=\"2-2-%e6%9f%a5%e8%a9%a2%e8%a6%96%e5%9c%96-gsabllHvBw\">2.2 \u67e5\u8a62\u8996\u5716<\/h3>\n<p>\u5275\u5efa\u8996\u5716\u5f8c\uff0c\u53ef\u4ee5\u50cf\u67e5\u8a62\u6578\u64da\u8868\u4e00\u6a23\u67e5\u8a62\u5b83\uff1a<\/p>\n<pre><code>SELECT * FROM IT\u54e1\u5de5;<\/code><\/pre>\n<h3 id=\"2-3-%e6%9b%b4%e6%96%b0%e8%a6%96%e5%9c%96-gsabllHvBw\">2.3 \u66f4\u65b0\u8996\u5716<\/h3>\n<p>\u8996\u5716\u7684\u6578\u64da\u662f\u52d5\u614b\u7684\uff0c\u7576\u57fa\u790e\u6578\u64da\u8868\u7684\u6578\u64da\u767c\u751f\u8b8a\u5316\u6642\uff0c\u8996\u5716\u7684\u67e5\u8a62\u7d50\u679c\u4e5f\u6703\u96a8\u4e4b\u6539\u8b8a\u3002\u9019\u610f\u5473\u8457\u7121\u9700\u5c0d\u8996\u5716\u9032\u884c\u66f4\u65b0\u64cd\u4f5c\uff0c\u53ea\u9700\u78ba\u4fdd\u57fa\u790e\u6578\u64da\u8868\u7684\u6578\u64da\u6b63\u78ba\u5373\u53ef\u3002<\/p>\n<h2 id=\"%e4%b8%89%e3%80%81%e6%9f%a5%e8%a9%a2%e7%9a%84%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-gsabllHvBw\">\u4e09\u3001\u67e5\u8a62\u7684\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li><strong>\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>\u70ba\u7d93\u5e38\u67e5\u8a62\u7684\u5217\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u907f\u514dSELECT *\uff1a<\/strong>\u5728\u67e5\u8a62\u4e2d\u6307\u5b9a\u6240\u9700\u7684\u5217\uff0c\u907f\u514d\u4f7f\u7528SELECT *\uff0c\u4ee5\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u50b3\u8f38\u3002<\/li>\n<li><strong>\u4f7f\u7528JOIN\u64cd\u4f5c\uff1a<\/strong>\u7576\u9700\u8981\u5f9e\u591a\u500b\u8868\u4e2d\u7372\u53d6\u6578\u64da\u6642\uff0c\u4f7f\u7528JOIN\u64cd\u4f5c\u53ef\u4ee5\u6709\u6548\u5730\u6574\u5408\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gsabllHvBw\">\u7e3d\u7d50<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u67e5\u8a62\u6578\u64da\u8868\u548c\u8996\u5716\u662f\u6578\u64da\u64cd\u4f5c\u7684\u57fa\u672c\u6280\u80fd\u3002\u901a\u904e\u638c\u63e1\u57fa\u672c\u7684SQL\u8a9e\u6cd5\u548c\u67e5\u8a62\u6280\u5de7\uff0c\u60a8\u53ef\u4ee5\u9ad8\u6548\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u6578\u64da\u8868\u9084\u662f\u8996\u5716\uff0c\u4e86\u89e3\u5176\u64cd\u4f5c\u6d41\u7a0b\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u60a8\u7684\u6578\u64da\u7ba1\u7406\u80fd\u529b\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6709\u66f4\u9ad8\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u66f4\u9ad8\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3DB2\u6578\u64da\u8868\u8207\u8996\u5716\u7684\u67e5\u8a62\u64cd\u4f5c\u6d41\u7a0b\uff0c\u638c\u63e1\u6578\u64da\u6aa2\u7d22\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60629","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60629","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=60629"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60629\/revisions"}],"predecessor-version":[{"id":60630,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60629\/revisions\/60630"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}