Question

我有两个包含不同数据的表，我想加入结果，以便从中避免重复数据。

表1：

Seasons  | Colors
win 17   | grey
win 17   | blue
win 18   | red
win 18   | black

表2：

Seasons  | Sizes | Weights
win 17   | 48    |   8
win 17   | 47    |   7
win 17   | 48    |   5
win 17   | 47    |   9
win 18   | 42    |   2
win 18   | 43    |   3
win 18   | 42    |   4
win 18   | 43    |   1

加入类似：

Seasons  | Sizes | Weights | Colors
win 17   | 48    |   8    |  grey
win 17   | 47    |   7    |  grey
win 17   | 48    |   5    |  grey
win 17   | 47    |   9    |  grey
win 17   | 48    |   8    |  blue
win 17   | 47    |   7    |  blue
win 17   | 48    |   5    |  blue
win 17   | 47    |   9    |  blue
win 18   | 42    |   2    |  red
win 18   | 43    |   3    |  red
win 18   | 42    |   4    |  red
win 18   | 43    |   1    |  red
win 18   | 42    |   2    |  black
win 18   | 43    |   3    |  black
win 18   | 42    |   4    |  black
win 18   | 43    |   1    |  black

我试过了

SELECT
  Seasons,
  Sizes,
  Weights,
  Colors
FROM (SELECT
  Seasons,
  Colors
FROM Table1) c
CROSS JOIN (SELECT
  Sizes,
  Weights
FROM table2) s
WHERE c.Seasons = s.Seasons
GROUP BY Seasons,
         Colors,
         Sizes,
         Weights;

但是我在同一季节有不同尺码和代码的重复颜色

Answer 1

试试这个：您可以使用JOIN尝试DISTINCT，但我不明白为什么要以这样的方式存储数据，您可以更好地将其标准化方式。

SELECT DISTINCT t1.Seasons, 
    t2.Sizes,
    t2.Weights,
    t1.Colors
FROM table1 t1
INNER JOIN table2 t2 ON t1.Seasons = t2.Seasons

加入两个具有相同colomn的表的结果，避免重复

1 个答案: