I have a list that looks like this: myList = [1, 1, 1, 1, 2, 2, 2, 3, 3, 3] What I want to do is record the index where the items in the list changes value. So for my list above it would be 3, 6.
In MySQL I have a query to count all of the browsers from a page_views table that I want to aggregate. Here\'s my query:
All I want is the count from TableA grouped by a column from TableB, but of course开发者_如何学Python I need the item from TableB each count is associated with.Better explained with code:
In Postgres 8.3, I need to group by certain elements with开发者_开发知识库in an array field. When I group by the array itself, all possible combinations are shown. I only want to group by the element.
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetoric开发者_Python百科al andcannot be reasonably answered in its current for
How can I use sub query in a query with group by section? I use SQL Server 2008 R2 AND Delphi 2010 I receive this error:
I am having issues taking out duplicate entries from this query containing multiple LEFT OUTER JOINs SELECT s.Category,
How do I retrieve a set of records, ordered by count in Arel? I have a model which tracks how many views a product get. I want to find the X most frequently viewed products over the last Y days.
This sounds quite simple but I just can\'t figure it out. I have a table orders (id, username, telephone_number).
I have a table like this one: DateTimeA 10:00:012 10:00:074 10:00:102 10:00:171 10:00:183 Is this possible to create a que开发者_如何学Pythonry that returns me the average value of A each 10 seco
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