Question

在尝试学习BigQuery SQL时，我正在使用公共数据集来运行一些建模。我有一个日期列，但我想按年份中的非完整日期分组。输入的日期为2018-2-12，但我想输入2-12或02-12。我有从日期中提取日期和月份的代码，但是找不到将两者串联以进行分组的方法。

      SELECT 
        EXTRACT (MONTH FROM sales.date) AS month,
        EXTRACT(DAY FROM sales.date) AS day ,
        ROUND(AVG(sales.bottles_sold/sales.pack), 2) as pack_qty, -- average case or pack
        ROUND(AVG(sales.bottles_sold), 2) AS qty_bottles, -- average total number of bottles
        ROUND(AVG(sales.sale_dollars), 2) as sales_rev, -- average sales rev
        ROUND(AVG((sales.state_bottle_retail - sales.state_bottle_cost) * sales.bottles_sold), 2) AS                          profit, -- avg profit on that day
        ROUND (AVG(sales.volume_sold_liters), 2) as volumeLit, -- average volume in liters
        ROUND (AVG(sales.volume_sold_gallons), 2) as volumeGal -- average volume in gal

      FROM `bigquery-public-data.iowa_liquor_sales.sales` AS sales

      GROUP BY 
          month,
          day
       ORDER BY 
        volumeGal DESC;

Answer 1

 SELECT 
        EXTRACT (MONTH FROM sales.date) AS month,
        EXTRACT(DAY FROM sales.date) AS day ,
        ROUND(AVG(sales.bottles_sold/sales.pack), 2) as pack_qty, -- average case or pack
        ROUND(AVG(sales.bottles_sold), 2) AS qty_bottles, -- average total number of bottles
        ROUND(AVG(sales.sale_dollars), 2) as sales_rev, -- average sales rev
        ROUND(AVG((sales.state_bottle_retail - sales.state_bottle_cost) * sales.bottles_sold), 2) AS                          profit, -- avg profit on that day
        ROUND (AVG(sales.volume_sold_liters), 2) as volumeLit, -- average volume in liters
        ROUND (AVG(sales.volume_sold_gallons), 2) as volumeGal -- average volume in gal 
   FROM `bigquery-public-data.iowa_liquor_sales.sales` AS sales    
      GROUP BY 
          EXTRACT (MONTH FROM sales.date),
          EXTRACT(DAY FROM sales.date) 
       ORDER BY 
        volumeGal DESC;

Answer 2

您应该在SELECT语句中使用CONCAT函数。通过以下查询，您将在结果中有一个单日列，其格式为“日-月”。

   SELECT 
    CONCAT(EXTRACT (DAY FROM sales.date) ,'-', EXTRACT(MONTH FROM sales.date)) AS day ,
    ROUND(AVG(sales.bottles_sold/sales.pack), 2) as pack_qty, -- average case or pack
    ROUND(AVG(sales.bottles_sold), 2) AS qty_bottles, -- average total number of bottles
    ROUND(AVG(sales.sale_dollars), 2) as sales_rev, -- average sales rev
    ROUND(AVG((sales.state_bottle_retail - sales.state_bottle_cost) * sales.bottles_sold), 2) AS                          profit, -- avg profit on that day
    ROUND (AVG(sales.volume_sold_liters), 2) as volumeLit, -- average volume in liters
    ROUND (AVG(sales.volume_sold_gallons), 2) as volumeGal -- average volume in gal

  FROM `bigquery-public-data.iowa_liquor_sales.sales` AS sales

  GROUP BY 
      day
   ORDER BY 
    volumeGal DESC;

Answer 3

您可以使用+运算符来连接两个字符串。

代码：

选择 convert（nvarchar，month（sales.date））+'-'+ convert（nvarchar，day（sales.date））作为date_month， ROUND（AVG（sales.bottles_sold / sales.pack），2）作为pack_qty，-平均大小或包装 ROUND（AVG（sales.bottles_sold），2）AS qty_bottles，-平均总瓶数 ROUND（AVG（sales.sale_dollars），2）作为sales_rev，-平均销售收入 ROUND（AVG（（sales.state_bottle_retail-sales.state_bottle_cost）* sales.bottles_sold），2）AS利润，-当天的平均利润 ROUND（AVG（sales.volume_sold_liters），2）作为volumeLit，-以升为单位的平均体积 ROUND（AVG（sales.volume_sold_gallons），2）作为volumeGal-gal的平均体积

从bigquery-public-data.iowa_liquor_sales.sales的AS销售

组别 date_month 订购 volumeGal DESC;

将信息从两列合并为一

3 个答案: