選擇基於兩個表的T-SQL

Question

不同行考慮在圖像中的表

如何從表2與同一ReferenceId選擇從表1的項目除外行？

結果應該是

Answer 1

可以聯接ReferenceId表，使用LEFT OUTER JOIN並將返回值限制在Table2上ReferenceId爲NULL的位置。

SELECT * FROM Table1 LEFT JOIN Table2 ON Table1.ReferenceId = Table2.ReferenceId 
WHERE Table2.ReferenceId IS NULL 

Answer 2

SELECT table1.id, table1.ReferenceID from table1 
    inner join table2 on table1.id = table2.id 
EXCEPT 
SELECT id, ReferenceID from table2 

Answer 3

您可以使用類似：

SELECT Id 
     ,ReferenceId 
FROM Table1 
WHERE ReferenceId NOT IN (SELECT DISTINCT ReferenceId FROM Table2); 

Answer 4

如何從表2與同一ReferenceId選擇從表1的項目除外行？

然後通過t2.ReferenceId <> t1.ReferenceId

SELECT t1.id, t1.ReferenceID FROM t1 
INNER JOIN t2 ON t1.id = t2.id 
WHERE t2.ReferenceID <> t1.ReferenceID; 

See this SQLFiddle

Answer 5

查詢它排除ReferenceId與條件

SELECT * 
FROM Table1 t1 
JOIN Table2 t2 on t1.Id = t2.Id 
    AND t1.Id <> t1.ReferenceId