摘要：
Which is preferred: Nullable<T>.HasValue or Nullable<T> != null? The compiler replaces null comparisons with a call to HasValue, so there is no real d 阅读全文
摘要：
遇到这个问题，是因为存储过程的参数，设置默认值写错了。 错误写法 @WhiteIp NVARCHAR(MAX) NULL, Stored procedure with default parameters I wrote with parameters that are predefined The 阅读全文