ibatis dynamic SQL using for How to implement between two date by IBATIS dynamic Sql -

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i a complex dynamic select statement in ibatis this

select * emp  //when dateparam between 2012-03-1 , 2013-03-01 union select * emp1 //when dateparam between 2014-03-1 , 2015-03-01 union select * emp2

i this:

select * emp   <islessequal  property="dateparam" comparevalue="2015-03-01">   union   select * emp1 </islessequal> <islessequal  property="dateparam" comparevalue="2013-03-01">   union   select * emp1 </islessequal>

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