{"id":153741,"date":"2024-11-02T09:58:18","date_gmt":"2024-11-02T01:58:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/153741\/"},"modified":"2024-11-02T09:58:19","modified_gmt":"2024-11-02T01:58:19","slug":"%e5%b8%b6%e6%82%a8%e4%ba%86%e8%a7%a3oracle%e6%96%87%e6%9c%ac%e5%87%bd%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/153741\/","title":{"rendered":"\u5e36\u60a8\u4e86\u89e3Oracle\u6587\u672c\u51fd\u6578"},"content":{"rendered":"<h1 id=\"%e5%b8%b6%e6%82%a8%e4%ba%86%e8%a7%a3oracle%e6%96%87%e6%9c%ac%e5%87%bd%e6%95%b8-AfVytXxvXA\">\u5e36\u60a8\u4e86\u89e3Oracle\u6587\u672c\u51fd\u6578<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6587\u672c\u8655\u7406\u662f\u4e00\u9805\u91cd\u8981\u7684\u4efb\u52d9\u3002Oracle\u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u6587\u672c\u51fd\u6578\uff0c\u9019\u4e9b\u51fd\u6578\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u6709\u6548\u5730\u8655\u7406\u548c\u64cd\u4f5c\u5b57\u7b26\u4e32\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u6587\u672c\u51fd\u6578\u7684\u57fa\u672c\u6982\u5ff5\u3001\u5e38\u7528\u51fd\u6578\u53ca\u5176\u61c9\u7528\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%aforacle%e6%96%87%e6%9c%ac%e5%87%bd%e6%95%b8%ef%bc%9f-AfVytXxvXA\">\u4ec0\u9ebc\u662fOracle\u6587\u672c\u51fd\u6578\uff1f<\/h2>\n<p>Oracle\u6587\u672c\u51fd\u6578\u662f\u7528\u65bc\u64cd\u4f5c\u5b57\u7b26\u4e32\u6578\u64da\u7684\u5167\u5efa\u51fd\u6578\u3002\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u57f7\u884c\u5404\u7a2e\u64cd\u4f5c\uff0c\u4f8b\u5982\u67e5\u627e\u3001\u66ff\u63db\u3001\u9023\u63a5\u3001\u622a\u53d6\u548c\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u3002\u9019\u4e9b\u51fd\u6578\u5728\u6578\u64da\u6e05\u7406\u3001\u5831\u544a\u751f\u6210\u548c\u6578\u64da\u5206\u6790\u4e2d\u90fd\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e7%94%a8%e7%9a%84oracle%e6%96%87%e6%9c%ac%e5%87%bd%e6%95%b8-AfVytXxvXA\">\u5e38\u7528\u7684Oracle\u6587\u672c\u51fd\u6578<\/h2>\n<h3 id=\"1-concat-AfVytXxvXA\">1. CONCAT<\/h3>\n<p>CONCAT\u51fd\u6578\u7528\u65bc\u5c07\u5169\u500b\u6216\u591a\u500b\u5b57\u7b26\u4e32\u9023\u63a5\u5728\u4e00\u8d77\u3002\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CONCAT(string1, string2)<\/code><\/pre>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT CONCAT('Hello, ', 'World!') AS Greeting FROM dual;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\uff1aHello, World!<\/p>\n<h3 id=\"2-length-AfVytXxvXA\">2. LENGTH<\/h3>\n<p>LENGTH\u51fd\u6578\u7528\u65bc\u8a08\u7b97\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u3002\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>LENGTH(string)<\/code><\/pre>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT LENGTH('Oracle') AS StringLength FROM dual;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\uff1a6<\/p>\n<h3 id=\"3-substr-AfVytXxvXA\">3. SUBSTR<\/h3>\n<p>SUBSTR\u51fd\u6578\u7528\u65bc\u5f9e\u5b57\u7b26\u4e32\u4e2d\u63d0\u53d6\u5b50\u5b57\u7b26\u4e32\u3002\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SUBSTR(string, start_position, length)<\/code><\/pre>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT SUBSTR('Oracle Database', 1, 6) AS Substring FROM dual;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\uff1aOracle<\/p>\n<h3 id=\"4-instr-AfVytXxvXA\">4. INSTR<\/h3>\n<p>INSTR\u51fd\u6578\u7528\u65bc\u67e5\u627e\u5b50\u5b57\u7b26\u4e32\u5728\u5b57\u7b26\u4e32\u4e2d\u7684\u4f4d\u7f6e\u3002\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>INSTR(string, substring, start_position, match_occurrence)<\/code><\/pre>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT INSTR('Oracle Database', 'D') AS Position FROM dual;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\uff1a8<\/p>\n<h3 id=\"5-replace-AfVytXxvXA\">5. REPLACE<\/h3>\n<p>REPLACE\u51fd\u6578\u7528\u65bc\u66ff\u63db\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e9b\u5b57\u7b26\u3002\u5176\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>REPLACE(string, search_string, replace_string)<\/code><\/pre>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT REPLACE('Hello World', 'World', 'Oracle') AS NewString FROM dual;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\uff1aHello Oracle<\/p>\n<h2 id=\"%e6%96%87%e6%9c%ac%e5%87%bd%e6%95%b8%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-AfVytXxvXA\">\u6587\u672c\u51fd\u6578\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>Oracle\u6587\u672c\u51fd\u6578\u5728\u591a\u7a2e\u5834\u666f\u4e2d\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\u3002\u4f8b\u5982\uff0c\u5728\u6578\u64da\u6e05\u7406\u904e\u7a0b\u4e2d\uff0c\u4f7f\u7528REPLACE\u51fd\u6578\u53ef\u4ee5\u53bb\u9664\u4e0d\u5fc5\u8981\u7684\u5b57\u7b26\uff1b\u5728\u5831\u544a\u751f\u6210\u4e2d\uff0c\u4f7f\u7528CONCAT\u51fd\u6578\u53ef\u4ee5\u5c07\u591a\u500b\u5b57\u6bb5\u5408\u4f75\u70ba\u4e00\u500b\u53ef\u8b80\u7684\u5b57\u7b26\u4e32\uff1b\u5728\u6578\u64da\u5206\u6790\u4e2d\uff0c\u4f7f\u7528LENGTH\u548cSUBSTR\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u5206\u6790\u5b57\u7b26\u4e32\u7684\u7d50\u69cb\u548c\u5167\u5bb9\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-AfVytXxvXA\">\u7e3d\u7d50<\/h2>\n<p>Oracle\u6587\u672c\u51fd\u6578\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5de5\u5177\u4f86\u8655\u7406\u548c\u64cd\u4f5c\u5b57\u7b26\u4e32\u6578\u64da\u3002\u901a\u904e\u4f7f\u7528\u9019\u4e9b\u51fd\u6578\uff0c\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\uff0c\u63d0\u5347\u5de5\u4f5c\u6548\u7387\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u6e05\u7406\u3001\u5831\u544a\u751f\u6210\u9084\u662f\u6578\u64da\u5206\u6790\u4e2d\uff0c\u9019\u4e9b\u51fd\u6578\u90fd\u80fd\u63d0\u4f9b\u91cd\u8981\u7684\u652f\u6301\u3002\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u60a8\u7684\u9805\u76ee\u4e2d\u4f7f\u7528\u9019\u4e9b\u6587\u672c\u51fd\u6578\u6709\u8208\u8da3\uff0c\u6216\u8005\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u7684\u8cc7\u8a0a\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u6587\u672c\u51fd\u6578\u7684\u529f\u80fd\u8207\u61c9\u7528\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u8b93\u60a8\u8f15\u9b06\u7ba1\u7406\u548c\u5206\u6790\u6587\u672c\u6578\u64da\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-153741","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153741","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=153741"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153741\/revisions"}],"predecessor-version":[{"id":153742,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153741\/revisions\/153742"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=153741"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=153741"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=153741"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}