从表 1 中选择:
SELECT a.region,a.host
FROM ftpup a
, ( SELECT info,type,timestamp, max(date) as time FROM ftpup GROUP BY type ) b
WHERE a.type = b.type AND a.date = b.time AND a.status <> '0' ORDER BY a.`date` DESC
表 1 的结果:
region --- host
SB --- H1
BS --- H2
PT --- H2
表2:
hostname --- region --- status
H1 --- SB --- 1
H2 --- PT --- 0
H2 --- BS --- 1
如何在状态字段的表中UPDATE TABLE2并将其设置为2，其中第一个选择的hostname = host(RESULT FROM TABLE1)和region = 第一个选择的区域(表 1 的结果)？
最佳答案
就这么简单。只需像下面这样做:
UPDATE table2
INNER JOIN (your inner select) AS table1
ON (table2.hostname = table1.host AND table2.region = table1.region)
SET table2.status=2
关于mysql - 更新来自 SELECT 的数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40035763/