{"id":67311,"date":"2015-08-26T11:09:57","date_gmt":"2015-08-26T03:09:57","guid":{"rendered":"http:\/\/www.xiaoyebailong.com\/?p=67311"},"modified":"2015-08-26T11:09:57","modified_gmt":"2015-08-26T03:09:57","slug":"sql%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%banull%e6%97%b6%e5%80%99asp%e8%af%ad%e5%8f%a5%e5%88%a4%e6%96%ad%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/www.xiaoyebailong.com\/index.php\/2015\/08\/26\/67311.htm","title":{"rendered":"sql\u6570\u636e\u5e93\u4e3anull\u65f6\u5019ASP\u8bed\u53e5\u5224\u65ad\u95ee\u9898"},"content":{"rendered":"<p>\u5728sql\u4e2d\u5224\u65ad\u4e3a\u7a7a\u7684\u65f6\u5019\u5f80\u5f80Rs(&#8220;num&#8221;)=&#8221;&#8221;\u4e0d\u8d77\u4f5c\u7528\uff0c\u8fd9\u4e2a\u662f\u5927\u591a\u6570\u4eba\u9047\u89c1\u7684\u95ee\u9898\u3002<\/p>\n<p>\u4e25\u8c28\u4e00\u70b9\uff0c\u8981\u6709\u4e24\u5c42\u5224\u65ad\uff1a<\/p>\n<p>If IsNull(Rs(&#8220;xx&#8221;)) Or Rs(&#8220;xx&#8221;) = &#8220;&#8221; Then<br \/>\n&#8230;..<br \/>\nEnd If<br \/>\n\u56e0\u4e3a\u5b57\u6bb5\u6709\u65f6\u4f1a\u88ab\u5199\u5165\u7a7a\u6570\u636e\uff0c\u5982\u679c\u5199\u5165\u4e86\uff0c\u4f46\u6570\u636e\u4e3a\u7a7a\u7684\u8bdd\uff0c\u5b57\u6bb5\u7684\u503c\u5c31\u662f\u7a7a\uff08&#8221;&#8221;\uff09\uff0c\u4e5f\u5c31\u4e0d\u662fNull\u4e86\uff0c\u6240\u4ee5\u8981\u6709\u4e24\u5c42\u5224\u65ad\u3002<\/p>\n<p>if IsNull(rs(&#8220;num&#8221;))=true then<br \/>\n&#8230;<br \/>\nend if<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728sql\u4e2d\u5224\u65ad\u4e3a\u7a7a\u7684\u65f6\u5019\u5f80\u5f80Rs(&#8220;num&#8221;)=&#8221;&#8221;\u4e0d\u8d77\u4f5c\u7528\uff0c\u8fd9\u4e2a\u662f\u5927\u591a\u6570\u4eba\u9047\u89c1\u7684\u95ee\u9898\u3002 \u4e25\u8c28\u4e00\u70b9\uff0c\u8981\u6709\u4e24\u5c42\u5224\u65ad\uff1a If IsNull(Rs(&#8220;xx&#8221;)) Or Rs(&#8230;<\/p>\n","protected":false},"author":1,"featured_media":67312,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[12,106,50],"topic":[],"class_list":["post-67311","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","tag-asp","tag-sql","tag-50"],"_links":{"self":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts\/67311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/comments?post=67311"}],"version-history":[{"count":2,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts\/67311\/revisions"}],"predecessor-version":[{"id":67314,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/posts\/67311\/revisions\/67314"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/media\/67312"}],"wp:attachment":[{"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/media?parent=67311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/categories?post=67311"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/tags?post=67311"},{"taxonomy":"topic","embeddable":true,"href":"http:\/\/www.xiaoyebailong.com\/index.php\/wp-json\/wp\/v2\/topic?post=67311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}