SELECT u_mattress_mx_extra.mattressid, u_mattress_mx_extra.mattressmxid, u_mattress_mx_extra.extraid, u_mattress_extra.extratypename, u_mattress_mx_extra.extraname, u_mattress_mx_extra.price, u_mattress_mx_extra.qty, '+' as addmx, '-' as delmx, u_mattress_mx_extra.dscrp From u_mattress_mx_extra Left OUTER JOIN u_mattress_extra On u_mattress_extra.extraid = u_mattress_mx_extra.extraid u_mattress_mx_extra.mattressid = @arg_mattressid u_mattress_extra.typeid = @arg_typeid u_mattress_extra.ifinit = @arg_ifinit 序 + - 项目类型 项目名称 金额 数量 备注