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:
区域---主机SB --- H1 BS --- H2 PT --- H2
表2:
主机名---区域---状态H1 --- SB --- 1 H2 --- PT --- 0 H2 --- BS --- 1
如何在表中的状态字段中将
UPDATE TABLE2
设置为2,其中第一个选择的hostname = host
(来自表1的结果)和第一选择的region = region
(来自表1的结果)? 最佳答案
太简单。就像下面这样:
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 - SELECT中的数据更新,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/40035763/