Stringsql="select concat(t3.optnty_name,t1.hetongluru_name) as name, t1.hetongluru_name as contract_no,t1.hetongluru_char12 as type,t1.hetongluru_date01 as sign_date,t1.hetongluru_start_date as maintain_sdate,t1.hetongluru_end_date as maintain_edate,t1.hetongluru_dec01 as total_amount,t2.cCusAbbName as customer_name,t4.cUser_Name as sale_name"+
" from tcu_hetongluru t1 left join Customer t2 on t1.account_id = t2.cCusCode left join tc_opportunity t3 on t1.hetongluru_char04 = t3.ufcode left join UA_User_Ex t4 on t1.owner_user_id = t4.cUser_Id";