更新另一個表中查詢的表格

Question

UPDATE devicenumplanmap 
SET devicenumplanmap.e164mask = '+1' 
FROM devicenumplanmap 
WHERE (select devicenumplanmap.pkid, devicenumplanmap.e164mask 
     from devicenumplanmap, device 
     where devicenumplanmap.fkdevice = device.pkid 
     and device.name like '%RDP' 
     and devicenumplanmap.e164mask like '819%') 

發生語法錯誤。

我們想更新表devicenumplanmap從另一個表中的搜索。

Answer 1

嘗試類似的東西：

UPDATE devicenumplanmap 
SET devicenumplanmap.e164mask = '+1' 
FROM devicenumplanmap 
WHERE **exists(select *** 
     from devicenumplanmap, device 
     where devicenumplanmap.fkdevice = device.pkid 
     and device.name like '%RDP' 
     and devicenumplanmap.e164mask like '819%') 

Answer 2

它看起來像你想UPDATE與JOIN。根據您的RDBMS，語法略有不同。

MySQL的：

UPDATE devicenumplanmap d 
    JOIN device de ON d.fkdevice = de.pkid 
SET d.e164mask = '+1' 
WHERE de.name like '%RDP' 
     AND d.e164mask like '819%' 

SQL服務器：

UPDATE d 
SET d.e164mask = '+1' 
FROM devicenumplanmap d 
    JOIN device de ON d.fkdevice = de.pkid 
WHERE de.name like '%RDP' 
     AND d.e164mask like '819%' 

更普遍的做法：

UPDATE devicenumplanmap 
SET e164mask = '+1' 
WHERE e164mask like '819%' AND 
    fkdevice IN (
     SELECT pkid 
     FROM Device 
     WHERE name like '%RDP' 
) 

Answer 3

這應該工作，容易和簡單

UPDATE devicenumplanmap 
SET devicenumplanmap.e164mask = '+1' 
FROM devicenumplanmap dp 
INNER JOIN device d 
ON dp.fkdevice = d.pkid 
WHERE d.name like '%RDP' 
and dp.e164mask like '819%'