{"id":2552,"date":"2013-03-15T08:30:34","date_gmt":"2013-03-15T08:30:34","guid":{"rendered":"http:\/\/enjoyasp.net\/?p=2552"},"modified":"2013-03-15T08:30:34","modified_gmt":"2013-03-15T08:30:34","slug":"%e8%ae%a1%e7%ae%97%e5%88%97","status":"publish","type":"post","link":"https:\/\/enjoyasp.net\/index.php\/2013\/03\/15\/%e8%ae%a1%e7%ae%97%e5%88%97\/","title":{"rendered":"\u8ba1\u7b97\u5217"},"content":{"rendered":"<pre class=\"brush:sql;first-line:1;pad-line-numbers:true;highlight:null;collapse:false;\">\r\nALTER TABLE frmuser_0315 ADD useralias AS (account+&#39;.net&#39;) PERSISTED\r\n\r\n\u8ba1\u7b97\u5217\u53ef\u7528\u4e8e\uff1a\r\n1\uff0c\u5bf9\u4e8e\u590d\u6742\u7684\u8ba1\u7b97\u81ea\u52a8\u4fdd\u5b58\u503c \r\n2\uff0c\u590d\u6742\u67e5\u8be2\u5229\u7528\u8ba1\u7b97\u5217checksum\u53d6\u503c\uff0c\u907f\u514dlike %%\r\n\r\n\u6ce8\uff1a\u9ed8\u8ba4\u662f\u4e0d\u6301\u4e45\u7684\uff0c\u5373\u5217\u5e76\u4e0d\u7269\u7406\u5b58\u5728\uff0c\u53ea\u662f\u903b\u8f91\u4e0a\u7684\uff0c\u4e0d\u80fd\u5efa\u7acb\u7d22\u5f15\u3002\r\n\u6307\u5b9a\u5728\u6307\u5b9a\u5217\u4e2d\u6dfb\u52a0\u6216\u5220\u9664 PERSISTED \u5c5e\u6027\u3002 \u8be5\u5217\u5fc5\u987b\u662f\u7531\u786e\u5b9a\u6027\u8868\u8fbe\u5f0f\u5b9a\u4e49\u7684\u8ba1\u7b97\u5217\u3002 \u5bf9\u4e8e\u6307\u5b9a\u4e3a PERSISTED \u7684\u5217\uff0c\u6570\u636e\u5e93\u5f15\u64ce\u5c06\u4ee5\u7269\u7406\u65b9\u5f0f\u5728\u8868\u4e2d\u5b58\u50a8\u8ba1\u7b97\u503c\uff1b\u5e76\u4e14\uff0c\u5f53\u66f4\u65b0\u4e86\u8ba1\u7b97\u5217\u4f9d\u8d56\u7684\u4efb\u4f55\u5176\u4ed6\u5217\u65f6\uff0c\u8fd9\u4e9b\u503c\u4e5f\u5c06\u88ab\u66f4\u65b0\u3002 \u901a\u8fc7\u5c06\u8ba1\u7b97\u5217\u6807\u8bb0\u4e3a PERSISTED\uff0c\u53ef\u4ee5\u5bf9\u786e\u5b9a\uff08\u4f46\u4e0d\u7cbe\u786e\uff09\u7684\u8868\u8fbe\u5f0f\u4e2d\u5b9a\u4e49\u7684\u8ba1\u7b97\u5217\u521b\u5efa\u7d22\u5f15\u3002\r\n\r\n\u76f8\u5173\u89c6\u56fe\uff1a\r\n\r\nSELECT TOP 50 * \r\nFROM sys.computed_columns\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>ALTER TABLE frmuser_0315 ADD useralias AS (account+&#038;#39 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-2552","post","type-post","status-publish","format-standard","hentry","category-sql-server"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/2552","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/comments?post=2552"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/2552\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=2552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=2552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=2552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}