EXISTS 与 IN
select t1.* from t1 where not exists (select 1 from t2 where t2.a = t1.a) where exists (select ...), select 有记录则结果为真,相当于 where 1 = 1where not exists (select ...),select有记录则结果为假,相当于 where 1 = 2
Windows命令行卸载IE
In this blog, I am sharing the commands available to uninstall Internet Explorer. Examples covered in this blog are for:Internet Explorer 9Internet Explorer 10Internet Explorer 11 Example for uninstalling Internet explorer 9Log on to the co...