php - 来自 2 个表的 Sql SELECT

Question

我有 2 个带有流动列的同一张桌子

id,
timestamp,
country,
data

table 1正在为 存储信息country A，并且 table 2正在为 存储信息country B

我需要去做SELECT from both table ORDER BY timestamp

任何人都可以用最好和正确的方法帮助我吗？

谢谢

Answer 1

请试试

(SELECT * FROM `table 1`)
UNION
(SELECT * FROM `table 2`)
ORDER BY timestamp;

Answer 2

SELECT * FROM tableA
UNION ALL
SELECT * FROM tableB

您需要应用于ORDER BY组合（UNION'ed）结果集，因此最终查询将如下所示：

SELECT * FROM (
    SELECT * FROM tableA
    UNION ALL
    SELECT * FROM tableB
) ORDER BY timestamp;

Answer 3

选择 t1.id,t1.timestamp,t1.country,t1.data,t2.id,t2.timestamp,t2.country,t2.data from tableA as t1,tableB as t2 order by t1.timestamp;