为了通过在日期类型

Question

相同像DATE_FORMAT（ExpenditureDate， '％D-％间 - ％Y'）'01 -01-2011' AND '31 -01-2011' 之间的问题，

另外我不能能够检查cond与之间，？

ExpenditureDate - DATE类型

下面的查询正确显示，最新的日期来顶一个个

SELECT ExpenditureName,ExpenditureAmount,ExpenditurePlaceTypeWhome,ExpenditureDate FROM tblexpenditure WHERE Status=1 AND EntryUser=2 ORDER BY ExpenditureDate DESC 

，但如果我加入DATE_FORMAT（ExpenditureDate，'％D-％间％Y'）作为ExpenditureDate

然后失去我正确的顺序，它显示所inordered

SELECT ExpenditureName,ExpenditureAmount,ExpenditurePlaceTypeWhome,date_format(ExpenditureDate,'%d-%m-%Y') as ExpenditureDate FROM tblexpenditure WHERE Status=1 AND EntryUser=2 ORDER BY ExpenditureDate DESC 

Answer 1

我没有一个运行mysql的盒子来测试，但我尽量避免将字符串格式化的可显示'开支日期'命名为与排序的字符串相同的名称。

Answer 2

MySQL似乎排序格式化的值。尽量写作

...,date_format(ExpenditureDate,'%d-%m-%Y') as FormattedExpenditureDate ... 

但保留列名为ORDER BY子句。

Answer 3

他们可能会排序，但按日期的排序顺序而不是按时间顺序。这是很正常的，因为您对ExpenditureDate别名进行排序，这是一个包含格式化日期的字符串。 使用另一个别名：

SELECT ExpenditureName,ExpenditureAmount,ExpenditurePlaceTypeWhome,date_format(ExpenditureDate,'%d-%m-%Y') as FormattedExpenditureDate FROM tblexpenditure WHERE Status=1 AND EntryUser=2 ORDER BY ExpenditureDate DESC 

如果你真的想保持相同的别名，你也可以试试这个：

SELECT ExpenditureName,ExpenditureAmount,ExpenditurePlaceTypeWhome,date_format(ExpenditureDate,'%d-%m-%Y') as ExpenditureDate FROM tblexpenditure WHERE Status=1 AND EntryUser=2 ORDER BY tblexpenditure.ExpenditureDate DESC