这是查询字符串。$query="SELECTt.id,t.assignee,t.owner,d.code,d.status,d.target_completion_date,d.target_extension_date,d.submission_date,d.approval_date,d.revision_start_date,d.revision_completion_date,d.message,ty.name,f.orig_name,f.new_name,b.payment_date,b.discount,b.total_cost,b.amount_payed,b.edit_