CommandText=@"select a.customer_name,a.customer_id,case when isnull(b.customer_id,'')!='' then 1 else 0 end isSelect from c_customer a
CommandText=@"select a.customer_name,a.customer_id,case when isnull(b.customer_id,'')!='' then 1 else 0 end isSelect,request_customer_id from c_customer a
left join (select customer_id from [essen_customer] a1 where a1.customer_id=@customer_id) b on a.customer_id=b.customer_id
left join (select customer_id,request_customer_id from [essen_customer] a1 where a1.customer_id=@customer_id) b on a.customer_id=b.customer_id