我有两个表，它是源表和目标表，如下所示：
原始来源表：
ID MemberID StartDate EndDate Status
1 1 2015-02-02 2015-05-05 0
2 2 2015-02-02 2015-05-05 0
3 1 2015-03-03 2015-06-06 0
4 1 2015-04-04 2015-06-06 0
5 1 2016-01-01 2016-02-02 0
6 3 2015-01-01 2015-03-03 0
原始目的地表：
ID MemberID StartDate EndDate
1 1 2015-03-02 2015-05-05
2 2 2015-04-02 2015-05-05
3 1 2016-01-02 2016-04-03
4 3 2015-01-01 2015-03-01
5 3 2015-03-03 2015-04-03
输出源表
ID MemberID StartDate EndDate Status
1 1 2015-02-02 2015-05-05 2(updated)
2 2 2015-02-02 2015-05-05 2(updated)
3 1 2015-03-03 2015-06-06 2(updated)
4 1 2015-04-04 2015-06-06 2(updated)
5 1 2016-01-01 2016-02-02 1(inserted)
6 3 2015-01-01 2015-03-04 3(fail)
输出目的地表
ID MemberID StartDate EndDate
1 1 2015-02-02 2015-06-06
2 2 2015-02-02 2015-05-05
3 1 2016-01-02 2016-04-03
4 3 2015-01-01 2015-03-01
5 3 2015-03-03 2015-04-03
6 1 2016-01-01 2016-02-02
假设：具有相同memberID的目标表日期范围永远不会重叠。
sql的伪代码如下。怎么可能实现？
foreach (var i in SourceTable)
{
foreach(var j in DestinationTable with same memberid as i)
{
if (i daterange overlap with only 1 j date range)
{
update DestinationTable date range to new date range by taking min and max date for both src and target
update SrcTable Status to 2
}
else if (i daterange overlap with more than 1 j date range)
{
update SrcTable Status to 3
}
else if (i do no overlap with any date range in j)
{
insert i to destination table
update SrcTable Status to 1
}
}