来自SELECT的数据更新

Question

SELECT FROM TABLE 1：

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

结果来自TABLE1：

  

区域---主体
SB --- H1
BS --- H2
PT --- H2

TABLE2：

  

主机名---地区---状态
H1 --- SB --- 1
H2 --- PT --- 0
H2 --- BS --- 1个

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（RESULT FROM TABLE1）的hostname = host和第一个选择的region = region（结果）从TABLE1）？

Answer 1

这么容易。就像下面这样做：

UPDATE table2
INNER JOIN (your inner select) AS table1
ON (table2.hostname = table1.host AND table2.region = table1.region)
SET table2.status=2