內連接缺少右括號。

Question

SELECT COUNT(1) 
FROM (CMEOWN.ird_no_preselection_1  AS t1 
INNER JOIN CMEOWN.ird_no_preselection_1_a AS t2 
ON t1.ird_number  = t2.ird_number 
AND t1.location_number = t2.location_number); 

我在做什麼錯在這裏？

Answer 1

爲什麼不無paranthesis：

SELECT COUNT(1) 
FROM CMEOWN.ird_no_preselection_1  AS t1 
INNER JOIN CMEOWN.ird_no_preselection_1_a AS t2 
ON t1.ird_number  = t2.ird_number 
AND t1.location_number = t2.location_number; 

那就試試這個（刪除AS ES）：

SELECT COUNT(1) 
FROM CMEOWN.ird_no_preselection_1 t1 
INNER JOIN CMEOWN.ird_no_preselection_1_a t2 
ON t1.ird_number  = t2.ird_number 
AND t1.location_number = t2.location_number;