使用SQL和OR在一起不起作用

Question

我想使用下面的sql語句獲取城市是亞特蘭大的記錄，分類代碼可以是2個不同的值。它不能正常工作，因爲它不僅僅給我亞特蘭大。如果我刪除最後的OR條件它完美，但我需要它是分類標準值。

SELECT NPI, ... 
FROM NPIData 
WHERE ([Provider Business Mailing Address City Name] = 'ATLANTA') 
    AND ([Healthcare Provider Taxonomy Code_1] = '122300000X') 
    OR ([Healthcare Provider Taxonomy Code_1] = '1223G0001X') 

任何想法我做錯了什麼？

Answer 1

OR比AND較低的優先級，所以你應該使用括號：

WHERE [Provider Business Mailing Address City Name] = 'ATLANTA' 
    AND ([Healthcare Provider Taxonomy Code_1] = '122300000X' OR 
     [Healthcare Provider Taxonomy Code_1] = '1223G0001X') 

一個更好的位置選擇是僅使用in：

WHERE [Provider Business Mailing Address City Name] = 'ATLANTA' 
    AND [Healthcare Provider Taxonomy Code_1] in ('122300000X', '1223G0001X') 

Answer 2

嘗試：

WHERE  ([Provider Business Mailing Address City Name] = 'ATLANTA') 
AND ([Healthcare Provider Taxonomy Code_1] = '122300000X' OR [Healthcare Provider Taxonomy Code_1] = '1223G0001X')