SQL查詢以按月統計2016年的Twitter評論

Question

我想列出2016年按月發布的Tweets數量。我是SQL的新手，但是嘗試了不同的方法來做到這一點。 以下是我的最新嘗試。 我不斷收到一條消息，指出我沒有正確使用datelogged 。 最后，我不確定如何格式化Total和Tweet_Cnt 。

Twitter中日期的格式如下： MESSAGE_POSTED_TIME: 2015-08-06 21:48:34. FYI---- Column Name=MESSAGE_POSTED_TIME; Table Name=DTrumpCampaign_Tweets MESSAGE_POSTED_TIME: 2015-08-06 21:48:34. FYI---- Column Name=MESSAGE_POSTED_TIME; Table Name=DTrumpCampaign_Tweets

Select
    Year(DATELOGGED), 
    Sum(Case When Month(DATELOGGED) = 1 Then 1 Else 0 End) Jan,
    Sum(Case When Month(DATELOGGED) = 2 Then 1 Else 0 End) Feb,
    Sum(Case When Month(DATELOGGED) = 3 Then 1 Else 0 End) Mar
From
    DTrumpCampaign_Tweets
Group By
    Year(DATELOGGED);

我希望表格的格式如下所示

Month(2016)     Tweet_Cnt   
Jan               25
Feb              100
Mar              200
total            325

非常感謝您的幫助。 謝謝。

Answer 1

這是一個帶有sqlfiddle演示的解決方案： http ://sqlfiddle.com/#!9/786acb/5

SELECT
    COALESCE(`Month(2016)`, 'Total') AS `Month(2016)`, Tweet_cnt
FROM 
(
    Select
        DATE_FORMAT(datelogged, '%b') AS `Month(2016)`,
        COUNT(*) AS Tweet_cnt
    From dtrumpcampaign_tweets
    WHERE YEAR(datelogged) = '2016'
    Group BY `Month(2016)` WITH ROLLUP
) t;

輸出如下：

+-------------+-----------+
| Month(2016) | Tweet_cnt |
+-------------+-----------+
| Feb         |         1 |
| Jan         |         2 |
| Mar         |         3 |
| Total       |         6 |
+-------------+-----------+
4 rows in set (0.00 sec)

Answer 2

假設您只需要2016年的數據。

---

SELECT
    (CASE WHEN t.`month` IS NULL THEN 'total'ELSE   t.monthName END) AS 'Month(2016)',
    t.Tweet_Cnt
FROM
    (
        SELECT
            MONTHNAME(DATELOGGED) AS monthName,
            YEAR (DATELOGGED) `year`,
            MONTH (DATELOGGED) `month`,
            COUNT(*) Tweet_Cnt
        FROM DTrumpCampaign_Tweets
        WHERE   YEAR (DATELOGGED) = '2016'
        GROUP BY `year`,`month` WITH ROLLUP
        LIMIT 13
    ) t;

---

演示與一些示例數據

---

您將獲得如下輸出結構：

| Month(2016) | Tweet_Cnt |
|-------------|-----------|
|     January |         1 |
|    February |         2 |
|       March |         1 |
|       April |         1 |
|         May |         1 |
|        June |         1 |
|        July |         1 |
|      August |         1 |
|   September |         1 |
|     October |         1 |
|    November |         1 |
|    December |         1 |
|       total |        13 |

---

更多：

如果您希望月份名稱僅包含前三個字母，則只需在上述查詢中更改相應的行，如下所示：

更改此行： SELECT MONTHNAME(DATELOGGED) AS monthName,

為此： SELECT DATE_FORMAT(DATELOGGED,"%b") AS monthName,

---

此修改查詢的演示

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