{"id":94568,"date":"2024-10-19T19:20:16","date_gmt":"2024-10-19T11:20:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/94568\/"},"modified":"2024-10-19T19:20:17","modified_gmt":"2024-10-19T11:20:17","slug":"oracle-where%e5%ad%90%e5%8f%a5%e7%a0%94%e7%a9%b6%e7%b5%90%e8%ab%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/94568\/","title":{"rendered":"Oracle Where\u5b50\u53e5\u7814\u7a76\u7d50\u8ad6"},"content":{"rendered":"<h1 id=\"oracle-where%e5%ad%90%e5%8f%a5%e7%a0%94%e7%a9%b6%e7%b5%90%e8%ab%96-nFpKVjMLnU\">Oracle Where\u5b50\u53e5\u7814\u7a76\u7d50\u8ad6<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u67e5\u8a62\u4e2d\uff0c<code>WHERE<\/code>\u5b50\u53e5\u662f\u7528\u4f86\u904e\u6ffe\u8cc7\u6599\u7684\u91cd\u8981\u5de5\u5177\u3002Oracle\u8cc7\u6599\u5eab\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u652f\u6301<code>WHERE<\/code>\u5b50\u53e5\u7684\u4f7f\u7528\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u4e2d<code>WHERE<\/code>\u5b50\u53e5\u7684\u529f\u80fd\u3001\u8a9e\u6cd5\u53ca\u5176\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2>1. <code>WHERE<\/code>\u5b50\u53e5\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p><code>WHERE<\/code>\u5b50\u53e5\u7528\u65bc\u6307\u5b9a\u67e5\u8a62\u4e2d\u8981\u9078\u64c7\u7684\u884c\u3002\u5b83\u53ef\u4ee5\u8207<code>SELECT<\/code>\u3001<code>UPDATE<\/code>\u3001<code>DELETE<\/code>\u7b49SQL\u8a9e\u53e5\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u904e\u6ffe\u51fa\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u8cc7\u6599\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM employees WHERE department_id = 10;<\/code><\/pre>\n<p>\u4e0a\u8ff0\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u90e8\u9580ID\u70ba10\u7684\u54e1\u5de5\u8cc7\u6599\u3002<\/p>\n<h2>2. <code>WHERE<\/code>\u5b50\u53e5\u7684\u8a9e\u6cd5<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c<code>WHERE<\/code>\u5b50\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2, ...\nFROM table_name\nWHERE condition;<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>condition<\/code>\u53ef\u4ee5\u662f\u4efb\u4f55\u6709\u6548\u7684\u689d\u4ef6\u8868\u9054\u5f0f\uff0c\u4f8b\u5982\u6bd4\u8f03\u904b\u7b97\u7b26\uff08\u5982<code>=<\/code>\u3001<code>&gt;<\/code>\u3001<code>&lt;<\/code>\u7b49\uff09\u6216\u908f\u8f2f\u904b\u7b97\u7b26\uff08\u5982<code>AND<\/code>\u3001<code>OR<\/code>\u3001<code>NOT<\/code>\u7b49\uff09\u3002<\/p>\n<h2 id=\"3-%e4%bd%bf%e7%94%a8%e9%82%8f%e8%bc%af%e9%81%8b%e7%ae%97%e7%ac%a6-nFpKVjMLnU\">3. \u4f7f\u7528\u908f\u8f2f\u904b\u7b97\u7b26<\/h2>\n<p>\u5728<code>WHERE<\/code>\u5b50\u53e5\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u908f\u8f2f\u904b\u7b97\u7b26\u4f86\u7d44\u5408\u591a\u500b\u689d\u4ef6\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM employees \nWHERE department_id = 10 AND salary &gt; 50000;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u90e8\u9580ID\u70ba10\u4e14\u85aa\u6c34\u5927\u65bc50000\u7684\u54e1\u5de5\u8cc7\u6599\u3002<\/p>\n<h2 id=\"4-%e4%bd%bf%e7%94%a8%e9%80%9a%e9%85%8d%e7%ac%a6-nFpKVjMLnU\">4. \u4f7f\u7528\u901a\u914d\u7b26<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u4f7f\u7528\u901a\u914d\u7b26\u4f86\u9032\u884c\u6a21\u7cca\u67e5\u8a62\u3002Oracle\u652f\u6301<code>LIKE<\/code>\u904b\u7b97\u7b26\uff0c\u4e26\u4e14\u53ef\u4ee5\u4f7f\u7528\u901a\u914d\u7b26<code>%<\/code>\u548c<code>_<\/code>\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM employees \nWHERE first_name LIKE 'A%';<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u540d\u5b57\u4ee5&#8221;A&#8221;\u958b\u982d\u7684\u54e1\u5de5\u3002<\/p>\n<h2 id=\"5-%e4%bd%bf%e7%94%a8%e5%ad%90%e6%9f%a5%e8%a9%a2-nFpKVjMLnU\">5. \u4f7f\u7528\u5b50\u67e5\u8a62<\/h2>\n<p>\u5728<code>WHERE<\/code>\u5b50\u53e5\u4e2d\uff0c\u60a8\u9084\u53ef\u4ee5\u4f7f\u7528\u5b50\u67e5\u8a62\u4f86\u9032\u884c\u66f4\u8907\u96dc\u7684\u67e5\u8a62\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM employees \nWHERE department_id IN (SELECT department_id FROM departments WHERE location_id = 1000);<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u4f4d\u65bc\u4f4d\u7f6eID\u70ba1000\u7684\u90e8\u9580\u7684\u54e1\u5de5\u8cc7\u6599\u3002<\/p>\n<h2 id=\"6-%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-nFpKVjMLnU\">6. \u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u5728\u4f7f\u7528<code>WHERE<\/code>\u5b50\u53e5\u6642\uff0c\u6027\u80fd\u662f\u4e00\u500b\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u70ba\u4e86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u5efa\u8b70\u4f7f\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62\u904e\u7a0b\u3002\u6b64\u5916\uff0c\u907f\u514d\u5728<code>WHERE<\/code>\u5b50\u53e5\u4e2d\u4f7f\u7528\u904e\u591a\u7684\u8a08\u7b97\u6216\u51fd\u6578\uff0c\u56e0\u70ba\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u5168\u8868\u6383\u63cf\uff0c\u5f9e\u800c\u5f71\u97ff\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-nFpKVjMLnU\">\u7d50\u8ad6<\/h2>\n<p>Oracle\u4e2d\u7684<code>WHERE<\/code>\u5b50\u53e5\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u7cbe\u78ba\u5730\u904e\u6ffe\u8cc7\u6599\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u908f\u8f2f\u904b\u7b97\u7b26\u3001\u901a\u914d\u7b26\u548c\u5b50\u67e5\u8a62\uff0c\u60a8\u53ef\u4ee5\u69cb\u5efa\u51fa\u9ad8\u6548\u4e14\u9748\u6d3b\u7684\u67e5\u8a62\u3002\u4e86\u89e3<code>WHERE<\/code>\u5b50\u53e5\u7684\u6700\u4f73\u5be6\u8e10\u548c\u6027\u80fd\u8003\u91cf\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u60a8\u7684\u8cc7\u6599\u5eab\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u512a\u5316\u60a8\u7684\u8cc7\u6599\u5eab\u67e5\u8a62\uff0c\u6216\u5c0b\u627e\u5408\u9069\u7684<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle Where\u5b50\u53e5\u7684\u7814\u7a76\u7d50\u8ad6\uff0c\u63ed\u793a\u5176\u5728\u6578\u64da\u67e5\u8a62\u4e2d\u7684\u95dc\u9375\u4f5c\u7528\u8207\u6700\u4f73\u5be6\u8e10\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u8207\u6e96\u78ba\u6027\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-94568","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94568","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=94568"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94568\/revisions"}],"predecessor-version":[{"id":94569,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94568\/revisions\/94569"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=94568"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=94568"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=94568"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}