获取基于条件的选择查询

Question

select initial_time, closing_date, length_of_duration(in minutes) from table1;

initial_time is in date time stamp (ex:2011-02-14 20:35:00)
closing_date is in date (for ex:2011-02-14)
length_of_duration in minutes (5)

我希望得到0或1（即真或假）：

对于true：

Current time stamp is greater than (initial_time + length_of_duration less than closing_date);

例如：If current time stamp is 2011-02-14 21:35:00 & initial_time -2011-02-14 20:35:00, length-5 mins and closing date is 2011-02-14, since current time is greater than these, it should return true.

根据mysql中的select查询获取此输出的任何想法？感谢。

Answer 1

if (date_add(initial_time , interval length_of_duration minute)
  <=concat(closing_date, ' 23:59:59'), 1, 0)

假设截止日期在2011-02-15之前，

使用23:59:59的原因，
这是2011-02-14 23:59:59