{"id":15779,"date":"2023-12-04T22:46:16","date_gmt":"2023-12-04T14:46:16","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15779"},"modified":"2023-12-04T22:51:49","modified_gmt":"2023-12-04T14:51:49","slug":"oracle-zhong-gei-chu-liang-ge-jian-cha-biao-jie-go-2","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-gei-chu-liang-ge-jian-cha-biao-jie-go-2\/","title":{"rendered":"Oracle \u4e2d\u7ed9\u51fa\u4e24\u4e2a\u68c0\u67e5\u8868\u7ed3\u6784\u7684\u65b9\u6cd5\uff1f"},"content":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4e24\u4e2a\u65b9\u6cd5\u68c0\u67e5\u8868\u7ed3\u6784\uff1a<\/p>\n<h3>1. \u4f7f\u7528 DESC \u547d\u4ee4\uff1a<\/h3>\n<pre><code class=\"language-sql  line-numbers\">DESC table_name;\n<\/code><\/pre>\n<ul>\n<li><strong>\u793a\u4f8b\uff1a<\/strong>\n<pre><code class=\"language-sql  line-numbers\">DESC employees;\n<\/code><\/pre>\n<\/li>\n<li><strong>\u8bf4\u660e\uff1a<\/strong>\n<ul>\n<li><code>DESC<\/code> \u547d\u4ee4\u7528\u4e8e\u663e\u793a\u8868\u7684\u7ed3\u6784\uff0c\u5305\u62ec\u5217\u540d\u3001\u6570\u636e\u7c7b\u578b\u3001\u7ea6\u675f\u7b49\u4fe1\u606f\u3002\u8fd9\u662f\u4e00\u4e2a\u7b80\u5355\u800c\u5feb\u901f\u7684\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5feb\u901f\u67e5\u770b\u8868\u7ed3\u6784\u7684\u9700\u6c42\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>2. \u67e5\u8be2\u6570\u636e\u5b57\u5178\u8868\uff1a<\/h3>\n<p>\u53ef\u4ee5\u901a\u8fc7\u67e5\u8be2 Oracle \u6570\u636e\u5b57\u5178\u8868\u6765\u83b7\u53d6\u8be6\u7ec6\u7684\u8868\u7ed3\u6784\u4fe1\u606f\u3002\u5e38\u7528\u7684\u6570\u636e\u5b57\u5178\u8868\u5305\u62ec <code>ALL_TAB_COLUMNS<\/code>\u3001<code>ALL_CONS_COLUMNS<\/code> \u7b49\u3002<\/p>\n<ul>\n<li><strong>\u793a\u4f8b\uff1a<\/strong>\n<pre><code class=\"language-sql  line-numbers\">SELECT COLUMN_NAME, DATA_TYPE, DATA_LENGTH, NULLABLE\nFROM ALL_TAB_COLUMNS\nWHERE TABLE_NAME = 'EMPLOYEES';\n<\/code><\/pre>\n<\/li>\n<li><strong>\u8bf4\u660e\uff1a<\/strong>\n<ul>\n<li>\u67e5\u8be2 <code>ALL_TAB_COLUMNS<\/code> \u8868\u53ef\u4ee5\u83b7\u53d6\u6307\u5b9a\u8868\u7684\u5217\u4fe1\u606f\uff0c\u5305\u62ec\u5217\u540d\u3001\u6570\u636e\u7c7b\u578b\u3001\u6570\u636e\u957f\u5ea6\u3001\u662f\u5426\u53ef\u7a7a\u7b49\u3002<\/li>\n<li>\u6839\u636e\u9700\u8981\uff0c\u53ef\u4ee5\u8054\u5408\u5176\u4ed6\u6570\u636e\u5b57\u5178\u8868\uff0c\u4f8b\u5982 <code>ALL_TAB_COLUMNS<\/code>\u3001<code>ALL_TAB_COLUMNS<\/code> \u7b49\uff0c\u83b7\u53d6\u66f4\u5168\u9762\u7684\u8868\u7ed3\u6784\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u8fd9\u4e24\u79cd\u65b9\u6cd5\u90fd\u662f\u5e38\u89c1\u7684\u7528\u4e8e\u68c0\u67e5\u8868\u7ed3\u6784\u7684\u65b9\u5f0f\uff0c\u9009\u62e9\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u9700\u6c42\u548c\u4e60\u60ef\u3002<code>DESC<\/code> \u547d\u4ee4\u9002\u7528\u4e8e\u5feb\u901f\u67e5\u770b\uff0c\u800c\u67e5\u8be2\u6570\u636e\u5b57\u5178\u8868\u5219\u63d0\u4f9b\u4e86\u66f4\u7075\u6d3b\u3001\u8be6\u7ec6\u7684\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4e24\u4e2a\u65b9\u6cd5\u68c0\u67e5\u8868\u7ed3\u6784\uff1a 1. \u4f7f\u7528 DESC \u547d\u4ee4\uff1a DESC table_n [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-15779","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15779","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=15779"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15779\/revisions"}],"predecessor-version":[{"id":15780,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15779\/revisions\/15780"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15779"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15779"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15779"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}