Linux下利用nc命令来监控检测服务器的端口使用情况

查询有图片的水库记录：

SELECT * FROM xxskWHERE (regcode IN (SELECT regcode FROM skpic))

SELECT * FROM xxsk WHERE EXISTS (SELECT regcode FROM skpic WHERE regcode = xxsk.regcode)

查询没有图片的水库记录：

SELECT * FROM xxsk WHERE (regcode NOT IN (SELECT regcode

FROM skpic))

查询所以水库记录，标明是否有图片：

SELECT skmc, 'pic' = (CASE WHEN regcode IN

(SELECT regcode

FROM skpic) THEN '1' ELSE '0' END)

FROM xxsk

验证身份，同时统计登陆次数

string cmdtext = "select zgid,pass,xsq,xiaqu,misrights,logintimes,roleid,";

cmdtext =cmdtext +" (SELECT COUNT(*) FROM loghistory WHERE (zgid = @zgid)) AS logtimes"+" from abc where (zgid=@zgid and pass=@pass)";

本文出自 “dotnet 移动开发” 博客，请务必保留此出处http://davidangel.blog.51cto.com/942491/767013