I am doing a query to get the number of builds per day from our database for the last 30 days. But it has become needed to marked days where there were no builds also.
for instance if I have a table like this 开发者_如何转开发totaldate 102010-01-01 152010-01-02 982010-01-03
my question is how can I select all 24 hours in a day as data in a select? There is a more polished way to do that:
I am trying to return a resultset from MySql which is grouped by the YEAR and MONTH, and which has a count returned for every YEAR/MONTH..
I have a query开发者_Python百科 that groups all entries from a table and groups them by the datetime column. This is all working great:
It is necessary to choose values for some dates, how to do this I know, but there is one problem that does not work to solve.
With the table: iddate_fromdate_to --------------------------- 12010-01-012010-03-01 22010-02-072010-05-01
I have the following query: SELECT timestamp, COUNT(*) FROM table GROUP BY timestamp But some timestamps do not show up because there is no data.Here\'s an example
色 萧敬腾 专辑：The Song 语种：国语 流派：Pop 唱片公司：华纳唱片 发行时间：2014-06-27
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