SQL复杂查询 合并LBR和BAC两个表

SQL语句为，

SELECT BD_LBR.id  AS ID, lanid      AS LanId, Side       AS Side, IsSameNext AS IsSameNext, Color      AS Color, Width      AS Width, Length     AS Length, Marking    AS Marking, GeomWGS84  AS GeomWGS84,BD_LBR.id  AS PermanentID, BD_LBR.GlobalId  AS LbrGlobalId, 1          AS OrderNumber, Type          AS liearType, SubType          AS liearSubType, 0.0        AS Offset FROM BD_LBR UNION ALL SELECT bac.id                AS ID, IFNULL(lbr.lanid, -1) AS LanId, IFNULL(lbr.side, -1)  AS Side, 0                     AS IsSameNext, 0                     AS Color, 0                     AS Width, bac.Length            AS Length, bac.Marking           AS Marking,bac.GeomWGS84         AS GeomWGS84,bac.id                AS PermanentID, bac.GlobalId       AS LbrGlobalId, bac.OrderNumber       AS OrderNumber, 0                     AS liearType, 0                     AS liearSubType, bac.Offset            AS Offset FROM BD_BAC bac LEFT JOIN BD_LBR lbr ON lbr.id = bac.lbrid;

结果为，

SQL语句为，

select bd_lbr.id as ID, lanid as LanId, Side as Side from bd_lbr
union all
select bac.id as ID, IFNULL(lbr.lanid, -1) as LanId, IFNULL(lbr.Side, -1) as Side from bd_bac bac left join bd_lbr lbr on bac.lbrid = lbr.id;

结果为，