{"id":154559,"date":"2024-11-02T16:49:22","date_gmt":"2024-11-02T08:49:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154559\/"},"modified":"2024-11-02T16:49:23","modified_gmt":"2024-11-02T08:49:23","slug":"%e5%b0%8d-oracle-sql-%e7%9b%b8%e5%90%8c%e8%aa%9e%e5%8f%a5%e7%9a%84%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154559\/","title":{"rendered":"\u5c0d Oracle SQL \u76f8\u540c\u8a9e\u53e5\u7684\u89e3\u6790"},"content":{"rendered":"<h1 id=\"%e5%b0%8d-oracle-sql-%e7%9b%b8%e5%90%8c%e8%aa%9e%e5%8f%a5%e7%9a%84%e8%a7%a3%e6%9e%90-lEUhAGjgiD\">\u5c0d Oracle SQL \u76f8\u540c\u8a9e\u53e5\u7684\u89e3\u6790<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cOracle SQL \u662f\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u67e5\u8a62\u8a9e\u8a00\uff0c\u80fd\u5920\u6709\u6548\u5730\u8655\u7406\u548c\u7ba1\u7406\u5927\u91cf\u6578\u64da\u3002\u5c0d\u65bc\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u4f86\u8aaa\uff0c\u7406\u89e3 Oracle SQL \u4e2d\u76f8\u540c\u8a9e\u53e5\u7684\u89e3\u6790\u904e\u7a0b\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e Oracle SQL \u7684\u89e3\u6790\u904e\u7a0b\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\uff0c\u4ee5\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e00\u4e3b\u984c\u3002<\/p>\n<h2 id=\"oracle-sql-%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-lEUhAGjgiD\">Oracle SQL \u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>Oracle SQL \u7684\u57fa\u672c\u7d50\u69cb\u5305\u62ec\u9078\u64c7\uff08SELECT\uff09\u3001\u63d2\u5165\uff08INSERT\uff09\u3001\u66f4\u65b0\uff08UPDATE\uff09\u548c\u522a\u9664\uff08DELETE\uff09\u7b49\u64cd\u4f5c\u3002\u9019\u4e9b\u64cd\u4f5c\u7684\u8a9e\u6cd5\u96d6\u7136\u76f8\u4f3c\uff0c\u4f46\u5728\u89e3\u6790\u904e\u7a0b\u4e2d\uff0cOracle \u6703\u6839\u64da\u4e0d\u540c\u7684\u4e0a\u4e0b\u6587\u548c\u689d\u4ef6\u9032\u884c\u512a\u5316\u548c\u8655\u7406\u3002<\/p>\n<h3 id=\"%e8%a7%a3%e6%9e%90%e9%81%8e%e7%a8%8b%e7%9a%84%e6%ad%a5%e9%a9%9f-lEUhAGjgiD\">\u89e3\u6790\u904e\u7a0b\u7684\u6b65\u9a5f<\/h3>\n<p>Oracle SQL \u7684\u89e3\u6790\u904e\u7a0b\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li><strong>\u8a5e\u6cd5\u5206\u6790\uff1a<\/strong>\u5c07 SQL \u8a9e\u53e5\u5206\u89e3\u70ba\u57fa\u672c\u7684\u8a9e\u6cd5\u55ae\u5143\uff08tokens\uff09\uff0c\u4f8b\u5982\u95dc\u9375\u5b57\u3001\u6a19\u8b58\u7b26\u548c\u904b\u7b97\u7b26\u3002<\/li>\n<li><strong>\u8a9e\u6cd5\u5206\u6790\uff1a<\/strong>\u6aa2\u67e5 SQL \u8a9e\u53e5\u7684\u7d50\u69cb\u662f\u5426\u7b26\u5408\u8a9e\u6cd5\u898f\u5247\uff0c\u4e26\u751f\u6210\u4e00\u500b\u8a9e\u6cd5\u6a39\uff08parse tree\uff09\u3002<\/li>\n<li><strong>\u8a9e\u7fa9\u5206\u6790\uff1a<\/strong>\u78ba\u4fdd SQL \u8a9e\u53e5\u7684\u8a9e\u7fa9\u6b63\u78ba\uff0c\u4f8b\u5982\u6aa2\u67e5\u8868\u548c\u5217\u7684\u5b58\u5728\u6027\u3002<\/li>\n<li><strong>\u67e5\u8a62\u512a\u5316\uff1a<\/strong>\u6839\u64da\u6578\u64da\u5eab\u7684\u7d71\u8a08\u4fe1\u606f\uff0c\u9078\u64c7\u6700\u4f73\u7684\u57f7\u884c\u8a08\u5283\u3002<\/li>\n<li><strong>\u57f7\u884c\uff1a<\/strong>\u6839\u64da\u512a\u5316\u5f8c\u7684\u57f7\u884c\u8a08\u5283\u57f7\u884c SQL \u8a9e\u53e5\uff0c\u4e26\u8fd4\u56de\u7d50\u679c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%9b%b8%e5%90%8c%e8%aa%9e%e5%8f%a5%e7%9a%84%e8%a7%a3%e6%9e%90%e7%a4%ba%e4%be%8b-lEUhAGjgiD\">\u76f8\u540c\u8a9e\u53e5\u7684\u89e3\u6790\u793a\u4f8b<\/h2>\n<p>\u70ba\u4e86\u66f4\u597d\u5730\u7406\u89e3 Oracle SQL \u7684\u89e3\u6790\u904e\u7a0b\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u76f8\u540c\u8a9e\u53e5\u7684\u793a\u4f8b\uff0c\u4e26\u5206\u6790\u5176\u89e3\u6790\u904e\u7a0b\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-1%ef%bc%9a%e5%9f%ba%e6%9c%ac%e6%9f%a5%e8%a9%a2-lEUhAGjgiD\">\u793a\u4f8b 1\uff1a\u57fa\u672c\u67e5\u8a62<\/h3>\n<pre><code>SELECT * FROM employees WHERE department_id = 10;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0cOracle \u9996\u5148\u6703\u9032\u884c\u8a5e\u6cd5\u5206\u6790\uff0c\u5c07\u8a9e\u53e5\u5206\u89e3\u70ba\u95dc\u9375\u5b57\uff08SELECT\u3001FROM\u3001WHERE\uff09\u3001\u6a19\u8b58\u7b26\uff08employees\u3001department_id\uff09\u548c\u5e38\u91cf\uff0810\uff09\u3002\u63a5\u8457\uff0c\u9032\u884c\u8a9e\u6cd5\u5206\u6790\uff0c\u78ba\u4fdd\u8a9e\u53e5\u7d50\u69cb\u6b63\u78ba\uff0c\u7136\u5f8c\u9032\u884c\u8a9e\u7fa9\u5206\u6790\uff0c\u6aa2\u67e5\u8868\u548c\u5217\u7684\u5b58\u5728\u6027\u3002\u6700\u5f8c\uff0cOracle \u6703\u6839\u64da\u6578\u64da\u5eab\u7684\u7d71\u8a08\u4fe1\u606f\u751f\u6210\u57f7\u884c\u8a08\u5283\uff0c\u4e26\u57f7\u884c\u67e5\u8a62\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-2%ef%bc%9a%e4%bd%bf%e7%94%a8%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b8%e7%9a%84%e6%9f%a5%e8%a9%a2-lEUhAGjgiD\">\u793a\u4f8b 2\uff1a\u4f7f\u7528\u805a\u5408\u51fd\u6578\u7684\u67e5\u8a62<\/h3>\n<pre><code>SELECT COUNT(*) FROM employees WHERE department_id = 10;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u8207\u524d\u4e00\u500b\u67e5\u8a62\u985e\u4f3c\uff0c\u4f46\u4f7f\u7528\u4e86\u805a\u5408\u51fd\u6578 COUNT\u3002\u89e3\u6790\u904e\u7a0b\u4e2d\u7684\u8a5e\u6cd5\u5206\u6790\u548c\u8a9e\u6cd5\u5206\u6790\u6b65\u9a5f\u76f8\u540c\uff0c\u4f46\u5728\u8a9e\u7fa9\u5206\u6790\u968e\u6bb5\uff0cOracle \u9700\u8981\u78ba\u5b9a COUNT \u51fd\u6578\u7684\u6b63\u78ba\u6027\uff0c\u4e26\u5728\u57f7\u884c\u968e\u6bb5\u8a08\u7b97\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\u6578\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e5%84%aa%e5%8c%96%e7%9a%84%e9%87%8d%e8%a6%81%e6%80%a7-lEUhAGjgiD\">\u67e5\u8a62\u512a\u5316\u7684\u91cd\u8981\u6027<\/h2>\n<p>\u67e5\u8a62\u512a\u5316\u662f Oracle SQL \u89e3\u6790\u904e\u7a0b\u4e2d\u7684\u4e00\u500b\u95dc\u9375\u6b65\u9a5f\u3002\u512a\u5316\u5668\u6703\u6839\u64da\u6578\u64da\u5eab\u7684\u7d71\u8a08\u4fe1\u606f\u548c\u7d22\u5f15\u60c5\u6cc1\uff0c\u9078\u64c7\u6700\u4f73\u7684\u57f7\u884c\u8a08\u5283\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u9084\u80fd\u6e1b\u5c11\u7cfb\u7d71\u8cc7\u6e90\u7684\u6d88\u8017\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5c0d\u65bc\u4e00\u500b\u5305\u542b\u5927\u91cf\u6578\u64da\u7684\u8868\uff0c\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u7d22\u5f15\u7684\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM employees WHERE last_name = 'Smith';<\/code><\/pre>\n<p>\u5982\u679c last_name \u5217\u4e0a\u6709\u7d22\u5f15\uff0cOracle \u5c07\u80fd\u5920\u66f4\u5feb\u5730\u5b9a\u4f4d\u5230\u7b26\u5408\u689d\u4ef6\u7684\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-lEUhAGjgiD\">\u7d50\u8ad6<\/h2>\n<p>\u7406\u89e3 Oracle SQL \u7684\u89e3\u6790\u904e\u7a0b\u5c0d\u65bc\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u638c\u63e1\u8a5e\u6cd5\u5206\u6790\u3001\u8a9e\u6cd5\u5206\u6790\u3001\u8a9e\u7fa9\u5206\u6790\u548c\u67e5\u8a62\u512a\u5316\u7b49\u6b65\u9a5f\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u64b0\u5beb\u548c\u512a\u5316 SQL \u8a9e\u53e5\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u6548\u7387\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u89e3\u6790 Oracle SQL \u4e2d\u76f8\u540c\u8a9e\u53e5\u7684\u904b\u4f5c\u539f\u7406\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u512a\u5316\u67e5\u8a62\u6548\u7387\u8207\u6578\u64da\u8655\u7406\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-154559","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154559","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=154559"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154559\/revisions"}],"predecessor-version":[{"id":154560,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154559\/revisions\/154560"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=154559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=154559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=154559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}