[英]MySQL pivot with multiple counts
This is a snapshot of my MySQL table: 这是我的MySQL表的快照:
Is it possible to write a query to get such a pivot table like output... 是否可以编写一个查询来获得像输出这样的数据透视表...
How about something like 怎么样的
SELECT url_host,
SUM(CASE WHEN post_id = -1 THEN 1 ELSE 0 END) as post_id_minus1,
SUM(CASE WHEN post_id = 0 THEN 1 ELSE 0 END) as post_id_0,
etc...
FROM YOUR_TABLE
GROUP BY url_host
You can use CASE
statement on this to pivot your table. 您可以使用CASE
语句来转动表。
SELECT url_host,
COUNT(CASE WHEN post_ID = -1 THEN 1 ELSE NULL END) Negative_One,
COUNT(CASE WHEN post_ID = 0 THEN 1 ELSE NULL END) Zero,
COUNT(CASE WHEN post_ID > 0 THEN 1 ELSE NULL END) Greater_Zero
FROM tableName
GROUP BY url_host
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