The conversion of a varchar data type to a datetime data typ_MySQL
刚刚有在程序中，传递一个空值至MS SQL Server数据库，这个值的数据类型为DATETIME
执行时，它却发生了如标题提示的异常：
The conversion of a varchar data type to a datetime data type resulted in an out-of-range value.
跟踪一下，当遇上一个空值时，它并没有真正是给一个空值给数据库，而是Datetime的最小值"1/1/0001 12:00:00 AM"
在两个文本框都是空值时，跟踪如下：
当这个值传入数居库时，数据库转换这个字符值为DateTime出错了：
试执行一下下面的SQL语句：
经查资料，是因为DateTime数据类型的最小值为"1/1/1753 12:00:00 AM"，如果想把"1/1/0001 12:00:00 AM"正确转换为日期时间，那得需要使用DATETIME2数据类型。
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