{"id":439,"date":"2019-12-02T17:15:12","date_gmt":"2019-12-02T09:15:12","guid":{"rendered":"http:\/\/www.821121.com\/?p=439"},"modified":"2020-12-11T10:17:36","modified_gmt":"2020-12-11T02:17:36","slug":"12c%e6%96%b0%e7%89%b9%e6%80%a7%ef%bc%9a%e4%b8%8d%e5%8f%af%e8%a7%81%e5%ad%97%e6%ae%b5","status":"publish","type":"post","link":"http:\/\/www.821121.com\/?p=439","title":{"rendered":"12C\u65b0\u7279\u6027\uff1a\u4e0d\u53ef\u89c1\u5b57\u6bb5"},"content":{"rendered":"<h2>1\u3001\u521b\u5efa\u8868<\/h2>\n<p>\u4e0d\u53ef\u89c1\u5b57\u6bb5\u7684\u5173\u952e\u5b57\u4e3ainvisible\uff0c\u5176\u4e2dpassword\u4e3a\u4e0d\u53ef\u89c1\u5b57\u6bb5\u3002<\/p>\n<pre><code class=\"language-sql\">SQL&gt; CREATE TABLE t_whs_invisible\n  2  (ID number, username varchar2(10),password varchar2(20) invisible);\n\nTable created.<\/code><\/pre>\n<h2>2\u3001\u63d2\u5165\u6570\u636e<\/h2>\n<pre><code class=\"language-sql\">SQL&gt; insert into t_whs_invisible values(1,&#039;test&#039;,&#039;test123&#039;);\ninsert into t_whs_invisible values(1,&#039;test&#039;,&#039;test123&#039;)\n            *\nERROR at line 1:\nORA-00913: too many values<\/code><\/pre>\n<p>\u63d2\u5165\u6570\u636e\u62a5\u9519\uff0c\u4e0d\u53ef\u89c1\u5b57\u6bb5\u9700\u8981\u660e\u786e\u6307\u5b9a\u5b57\u6bb5\u540d\u624d\u80fdinsert\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-sql\">SQL&gt; insert into t_whs_invisible(ID,username,password) values(1,&#039;test&#039;,&#039;test123&#039;);\n\n1 row created.\n\nSQL&gt; commit;\n\nCommit complete.<\/code><\/pre>\n<h2>3\u3001\u67e5\u8be2<\/h2>\n<p>\u67e5\u8be2\u7684\u65f6\u5019\u4e5f\u6709\u660e\u786e\u6307\u5b9a\u5217\u540d\u624d\u80fd\u67e5\u770b\u7684\u5230<\/p>\n<pre><code class=\"language-sql\">SQL&gt; select * from t_whs_invisible;\n\n        ID USERNAME\n---------- ------------------------------\n         1 test\n\nSQL&gt; set linesize 200\nSQL&gt; select ID,username,password from t_whs_invisible;\n\n        ID USERNAME                       PASSWORD\n---------- ------------------------------ ------------------------------------------------------------\n         1 test                           test123<\/code><\/pre>\n<p>desc\u67e5\u770b\u8868\u7ed3\u6784\u662f\u6ca1\u6709\u8fd9\u4e2a\u5b57\u6bb5\u7684<\/p>\n<pre><code class=\"language-sql\">SQL&gt; desc t_whs_invisible\n Name                    Null?    Type\n ----------------------- -------- ----------------\n ID                               NUMBER\n USERNAME                         VARCHAR2(10)<\/code><\/pre>\n<p>\u53ea\u6709\u67e5\u770b\u89c6\u56fe\u624d\u80fd\u770b\u5230<\/p>\n<pre><code class=\"language-sql\">SQL&gt;  select table_name,column_name from dba_tab_columns where table_name=&#039;T_WHS_INVISIBLE&#039;;\n\nTABLE_NAME      COLUMN_NAME\n--------------- ------------------------------\nT_WHS_INVISIBLE ID\nT_WHS_INVISIBLE USERNAME\nT_WHS_INVISIBLE PASSWORD<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001\u521b\u5efa\u8868 \u4e0d\u53ef\u89c1\u5b57\u6bb5\u7684\u5173\u952e\u5b57\u4e3ainvisible<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39],"tags":[],"class_list":["post-439","post","type-post","status-publish","format-standard","hentry","category-39"],"_links":{"self":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=439"}],"version-history":[{"count":1,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/439\/revisions"}],"predecessor-version":[{"id":440,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/439\/revisions\/440"}],"wp:attachment":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=439"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}