Delete duplicate records SQL-SERVER

select count(*)cnt,ibitm into jde_rk.dbo.ttt_11 from jde_rk.dbo.tttt_4102 group by ibitm  having count(*)>1

DELETE jde_rk.dbo.tttt_4102 

FROM jde_rk.dbo.tttt_4102 a, jde_rk.dbo.ttt_11 b

WHERE a.ibitm=b.ibitm

AND t1.col2 = holdkey.col2