Question

我有两个表：一个包含年终信息的数据，另一个包含多个产品的季度信息结尾。我想加入它们，以便每行每天都有一个产品的信息：

product_id | annual or quarter date | annual_info | quarterly_info

完整的外部联接，如：

select a.date, b.date from 
annual_table a
full outer join quarterly_table q on q.product_id = a.product_id and q.date = a.date

不起作用，因为它只给我年末日期：

date       |date       |
-----------|-----------|
1996-12-31 |           |
1997-12-31 |           |
1998-12-31 |           |
1999-12-31 |           |
2000-12-31 |           |
2001-12-31 |           |
2002-12-31 |2002-12-31 |
2003-12-31 |2003-12-31 |
2004-12-31 |2004-12-31 |
2005-12-31 |2005-12-31 |
2006-12-31 |2006-12-31 |
2007-12-31 |2007-12-31 |

我认为完整的外连接也应该包含在另一个表中没有对应的行。

年度表：

product_id  |date       |sales            |
------------|-----------|-----------------|
GHPRRB-S-US |1996-12-31 |48.5933895113959 |
GHPRRB-S-US |1997-12-31 |177.526458150594 |
GHPRRB-S-US |1998-12-31 |184.663          |
GHPRRB-S-US |1999-12-31 |276.333          |
GHPRRB-S-US |2000-12-31 |440.285          |
GHPRRB-S-US |2001-12-31 |298.466          |
GHPRRB-S-US |2002-12-31 |301.962          |
GHPRRB-S-US |2003-12-31 |391.93           |
GHPRRB-S-US |2004-12-31 |621.138          |
GHPRRB-S-US |2005-12-31 |420.929          |
GHPRRB-S-US |2006-12-31 |517.706          |
GHPRRB-S-US |2007-12-31 |475.089          |

季度表：

product_id  |date       |sales   |
------------|-----------|--------|
GHPRRB-S-US |2002-03-31 |68.97   |
GHPRRB-S-US |2002-06-30 |77.702  |
GHPRRB-S-US |2002-09-30 |80.123  |
GHPRRB-S-US |2002-12-31 |75.167  |
GHPRRB-S-US |2003-03-31 |68.97   |
GHPRRB-S-US |2003-06-30 |91.701  |
GHPRRB-S-US |2003-09-30 |103.085 |
GHPRRB-S-US |2003-12-31 |125.926 |
GHPRRB-S-US |2004-03-31 |130.28  |
GHPRRB-S-US |2004-06-30 |179.916 |
GHPRRB-S-US |2004-09-30 |163.52  |
GHPRRB-S-US |2004-12-31 |148.129 |
GHPRRB-S-US |2005-03-31 |115.843 |
GHPRRB-S-US |2005-06-30 |122.392 |
GHPRRB-S-US |2005-09-30 |124.545 |
GHPRRB-S-US |2005-12-31 |124.641 |
GHPRRB-S-US |2006-03-31 |127.33  |
GHPRRB-S-US |2006-06-30 |143.873 |
GHPRRB-S-US |2006-09-30 |136.842 |
GHPRRB-S-US |2006-12-31 |109.661 |
GHPRRB-S-US |2007-03-31 |97.253  |
GHPRRB-S-US |2007-06-30 |114.988 |
GHPRRB-S-US |2007-09-30 |128.189 |
GHPRRB-S-US |2007-12-31 |134.659 |

Answer 1

只是为了结束这个：我有一个限制结果的where子句。我将WHERE子句推入ON条件，我能够看到所有结果。

感谢@xQbert发现它！

具有多列的完全外部联接

1 个答案: