從多個表中選擇列

Question

我有多個具有相同主鍵字段但沒有其他相同字段的表。我要選擇像這樣從所有的表匹配到一個特定的主鍵列的集合，東西：（！感謝@Abelisto）

SELECT T1.a, T2.b, ..., TN.z FROM T1, T2, ..., TN WHERE T1.pk = "abc" 

Answer 1

SELECT T1.a, T1.b, ..., TN.z 
FROM T1 INNER JOIN T2 ON T1.pk = T2.pk 
INNER JOIN T3 on T1.pk = T3.pk 
... 
INNER JOIN TN on T1.pk = TN.pk 
AND TN.pk = "abc" 

或者在較短的形式。

SELECT T1.a, T1.b, ..., TN.z 
FROM T1 JOIN T2 using(pk) 
JOIN T3 using(pk) 
... 
JOIN TN using(pk) 
WHERE TN.pk = "abc"