dongle2627 2011-01-03 17:04
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根据另一列的值过滤一列上的多个值

Previously I asked about filtering one column for multiple values where all of them must be present in the column, otherwise no results should be given. I recieved good answer, but this time my request changed somewhat and i need something different.

So I need to filter one column for couple values and show results only if all those values are there AND all those values are related to one value in another column.

Example table:

+----+--------+----------+
| id | Fruit | Color |
+----+--------+----------+
| 1 | apple | green |
| 2 | apple | yellow |
| 3 | banana | green |
| 4 | banana | yellow |
| 5 | mango | green |
+----+--------+----------+

E.g. if values 'green and yellow' are submitted, only fruits that have both of these colors should be in the result set, in this case 'apple' and 'banana'. All other rows should be dismissed.

I am using MySQL with php.

Example "wrong code":

select Fruit FROM table WHERE Color = green AND Color = yellow 

Must return first 4 rows but not 5.

Thank you
Andrew

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  • duan1983 2011-01-03 18:43
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    Assuming you need each fruit name only once:

     SELECT Fruit FROM table WHERE Color IN ('green', 'yellow')
        GROUP BY Fruit HAVING COUNT(*) >= 2
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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