java - How to Subtract number of days from current date in HQL query -

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i using hql data inserted exact 21 days now. here code

query querythreeweek = session.createquery("from users createddate = curdate()-21"); list<users> userdetailsthreeweeklist = querythreeweek.list();

i can not use createsqlquery. right not getting data, there data date 2016-06-20. , because of month changed because when used curdate()-7 got correct data of date 2016-07-04. calculation dat like;

2016-07-11 - 7 = 20160704 2016-07-11 - 21 = 20160690

i tired using interval native sqlquery. here code using interval in hql: 

query querythreeweek = session.createquery("from users createddate = date( date_sub( now() , interval 21 day ) )"); list<users> userdetailsthreeweeklist = querythreeweek.list();

also tried

query querythreeweek = session.createquery("from users createddate = date( date_sub( curdate() , interval 21 day ) )");  list<users> userdetailsthreeweeklist = querythreeweek.list();

but giving me exception like: org.hibernate.hql.internal.ast.querysyntaxexception: unexpected token: 21.

so can use instead of subtracting day this: curdate()-21? in hql only

you can use date_sub 

 "from users createddate =   date( date_sub( now() , interval 21 day ) )"

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