在另一列为零的列中查找min

Question

我正在尝试编写一个MySQL搜索，找到最低imageID，其他两列= 0.在这种情况下，返回的imageID将是8.

ImageId   Processing   Finished
  5           0           1
  6           1           0
  7           0           1
  8           0           0
  9           1           0
  10          0           1
  11          1           0
  12          0           0
  13          0           0 
  14          0           0
  15          0           0

Answer 1

  

找到最低的imageID，其他两列= 0

只需在查询中转换您的句子：

(find)    (the lowest imageID) (where the other two columns = 0)  
[SELECT]   [MIN(imageID)]      [WHERE Processing = 0 AND Finished = 0]

所以你的完整查询应该是（使用MIN()聚合函数）：

SELECT MIN(ImageId) as LowestImageId
FROM Mytable 
WHERE Processing = 0 
  AND Finished = 0

See this SQLFiddle demo

Answer 2

select min(ImageId) from tablename where processing=0 and finished=0;

这是相当基本的SQL，如果你自己做一些研究，很容易找到。

Answer 3

SELECT MIN(ImageId) FROM your_table WHERE Processing = 0 AND Finished = 0