SQL server queries are case sensitive

By default ,select Statements are case insensitive , The sentence form is ：

               string strSelect = "select UserName from UserInfor where

                        UserName [email protected] and

                        UserPWD  [email protected]";

  string strSelect = "select UserName from UserInfor where

                        UserName [email protected] and

                        UserPWD  [email protected]";

If you need to be case sensitive , It needs to be written as ：

         string strSelect = "select UserName from UserInfor where

                        UserName collate [email protected] and

                        UserPWD collate [email protected]";

 string strSelect = "select UserName from UserInfor where 

                        UserName collate [email protected] and 

                        UserPWD collate [email protected]";