Question

我将按月将数据存储到数据库表中，并且我想知道哪种表结构最好。

对于它的价值，我将使用MySQL并且更愿意使用选项1.

选项1 - （我认为这是规范化）

month_id - tinyint unsigned
value - int unsigned

选项2 - 每个表字段存储1个月

january - int unsigned
february - int unsigned
march - int unsigned
(etc to December.)

Answer 1

选项1.

如果您需要超过一年的话，这很容易扩展。

然后，如果您需要其他格式的数据，您可以使用：

Select 
  sum(case month_id when 1 then Value end) as January,
  sum(case month_id when 2 then Value end) as February,
  sum(case month_id when 3 then Value end) as March,
  sum(case month_id when 4 then Value end) as April,
  sum(case month_id when 5 then Value end) as May,
  sum(case month_id when 6 then Value end) as June,
  sum(case month_id when 7 then Value end) as July,
  sum(case month_id when 8 then Value end) as August,
  sum(case month_id when 9 then Value end) as September,
  sum(case month_id when 10 then Value end) as October,
  sum(case month_id when 11 then Value end) as November,
  sum(case month_id when 12 then Value end) as December
from MonthlyData

哪个SQL表结构更适合按月存储数据？

1 个答案: