查詢表達式中的語法錯誤（缺少運算符）？

Question

你好，並提前感謝您的任何幫助。

我收到一個錯誤：'語法錯誤（缺少運算符）在查詢表達式'，我不知道爲什麼...任何想法？

這是我的查詢：

UPDATE 
table1 

SET 
table1.country_name = table2.COUNTRY, 
table1.city = table2.CITY , 
table1.state = table2.STATE 

FROM 
(table1 
inner join 
table2 
ON 
table2.SITE_ID = table1.SiteID) 

where 
table1.country_name is null; 

Answer 1

沒有FROM子句中UPDATE query in Access/Jet SQL：

UPDATE table1 INNER JOIN table2 ON table1.SiteID = table2.SITE_ID 
SET table1.country_name = table2.COUNTRY, 
    table1.city = table2.CITY , 
    table1.state = table2.STATE 
WHERE table1.country_name is null; 

Answer 2

失去連接表周圍的括號。另外，我會親自爲table1和table2創建一個別名，並在更新中引用table1別名。就像這樣：

UPDATE t1 
SET 
    t1.country_name = t2.COUNTRY, 
    t1.city = t2.CITY, 
    t1.state = t2.STATE 
FROM table1 t1 
INNER JOIN table2 t2 ON t2.SITE_ID = t1.SiteID 
WHERE 
    t1.country_name is null;