Mysql，显示两个表

Question

我对SQL有疑问。

我有两张桌子。

Buy and Sell

在这些表中，数据有些相同。

ID，数量，总和，时间戳

如何打印按时间戳排序的两个表格。 所以它看起来像这样

Buy  | 1 | 5  | 100 | 14:14:14 |
Buy  | 2 | 22 | 50  | 14:14:20 |
Sell | 1 | 1  | 20  | 14:15:01 |

等等..我只需按时间戳排序

Answer 1

使用UNION

SELECT 'Buy' as [Type], b.* FROM BUY as b
UNION ALL 
SELECT 'Sell' as [Type], s.* FROM SELL as s
ORDER BY Timestamp 

Answer 2

你应该可以这样做：

SELECT ID, Quantity, Sum, TimeStamp
FROM Buy
UNION ALL
SELECT ID, Quantity, Sum, TimeStamp
FROM Sell
ORDER BY TimeStamp