Question

使用oracle开发人员，我运行了一个导致下表的查询。但我只想得到column1匹配所有值列2（3,4,8）的结果。所以输出将是2,3，但不是4.我确定有一种方法可以在没有硬编码的情况下得到这个结果吗？我在考虑某种自我加入？

    select column1, column2
    from table1
    where column1 in (
        select column1
        from table2
        where depth >= 100)
    order by column2;

输出：

    column1   column2
    3          2
    8          2
    4          2
    3          3
    4          3
    8          3
    4          4

表2

    Column1     Area_Name       Depth
    1           Lake            40
    2           River           50
    3           Ocean           150
    4           Cliff           150
    5           Mountain        90
    6           Construction    60
    7           Building        50
    8           Random          100
    9           Also Random     50
    10          Another one     80

需要输出：

    column2
    2
    3

好的，这就是我要找的东西：

    SELECT table1.column1
    FROM table1
        INNER JOIN table2 
        ON table1.column2 = table2.column2
        WHERE table2.depth >= 100
    GROUP BY boat_id
    HAVING COUNT(*) >= (
        select count(*) 
        from table2
        where depth >= 100);

Answer 1

<强>已更新

WITH qry AS (
  SELECT column1, column2
    FROM table1
   WHERE column1 IN (
        SELECT column1
          FROM table2
         WHERE depth >= 100)
) 
SELECT t1.column2
  FROM qry t1 LEFT JOIN qry t2
    ON t1.column1 = t2.column1 AND t1.column2 = t2.column2
 GROUP BY t1.column2
HAVING COUNT(*) = (SELECT COUNT(DISTINCT column1) FROM qry)
ORDER BY t1.column2

输出：

| COLUMN2 |
-----------
|       2 |
|       3 |

<强> SQLFiddle

已解决：返回输出的查询，其中一列与另一列中的所有值匹配

1 个答案: