我有两张完全相同的桌子。我想将它们连接成一个大型数据集。我只是尝试了SELECT-INTO
查询,但收到了错误...
SELECT * INTO dbo.ParkingBay
FROM (SELECT * FROM dbo.ParkingBay_Old
UNION
SELECT * FROM dbo.ParkingBay_New) AS PARKING_BAY;
错误是:
几何数据类型不能选为DISTINCT,因为它是 没有可比性。
答案 0 :(得分:2)
UNION对组合结果集执行DISTINCT。
UNION ALL消除了这个DISTINCT步骤,但会在结果中产生欺骗的可能性。
如果您对可能性有所了解,那么试试这个
SELECT * INTO dbo.ParkingBay
FROM (SELECT * FROM dbo.ParkingBay_Old
UNION ALL
SELECT * FROM dbo.ParkingBay_New) AS PARKING_BAY;
答案 1 :(得分:1)
看起来ALL
解决了所有问题:
SELECT * INTO dbo.ParkingBay
FROM (SELECT * FROM dbo.ParkingBay_Old
UNION ALL
SELECT * FROM dbo.ParkingBay_New) AS PARKING_BAY;