Question

我有以下几个列的表格：

 foo
  reportdate baar
  01.04.16   1

  baar_value
  b_value from_date to_date
  1       01.01.16   01.01.17
  1       01.01.15   01.01.16

我想要的逻辑有点复杂，但我试图找到一种方法来引用以下查询中baar_value-where子句中的表foo的reportdate：

SELECT *
FROM foo
WHERE baar IS NOT NULL
AND NOT EXISTS
  (SELECT *
  FROM baar_value
  WHERE b_value = baar
  AND reportdate
  BETWEEN from_date AND to_date
  )

如何检查foo.reportdate是否在baar_value.from_date和baar_value_to_date之间？

Answer 1

根据您的描述，您可能只需要以下内容：

SELECT *
FROM foo
WHERE baar IS NOT NULL
AND NOT EXISTS
  (SELECT *
  FROM baar_value
  WHERE b_value = baar
    AND foo.reportdate BETWEEN from_date AND to_date
  )

<强>测试

SQL> create table foo(reportdate, baar) as
  2      select date '2016-04-01', 1 from dual;

Table created.

SQL> create table baar_value( b_value, from_date, to_date) as
  2      select 1, date '2016-01-01', date '2017-01-01' from dual union all
  3      select 1, date '2015-01-01', date '2016-01-01' from dual;

Table created.

SQL> SELECT *
  2  FROM foo
  3  WHERE baar IS NOT NULL
  4  AND NOT EXISTS
  5                (SELECT *
  6                FROM baar_value
  7                WHERE b_value = baar
  8                  AND foo.reportdate BETWEEN from_date AND to_date
  9                );

no rows selected

oracle如何从其他表

1 个答案: