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Get top 1 row of each group

...s will arbitrarily pick one. To get both entries for a day, use DENSE_RANK instead As for normalised or not, it depends if you want to: maintain status in 2 places preserve status history ... As it stands, you preserve status history. If you want latest status in the parent table too (which is ...
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How do you delete an ActiveRecord object?

... It's destroy and destroy_all methods, like user.destroy User.find(15).destroy User.destroy(15) User.where(age: 20).destroy_all User.destroy_all(age: 20) Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after_destroy callbacks or any dependent as...
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MySQL Select all columns from one table and some from another table

... all the columns from one table and just some columns from another table using JOIN? In MySQL. 4 Answers ...
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Encoding Javascript Object to Json string

I want to encode a Javascript object into a JSON string and I am having considerable difficulties. 2 Answers ...
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Where'd padding go, when setting background Drawable?

...ve this issue on my EditText and Button views, where I have a nice padding for them to space away from the text, but when I change the background with setBackgroundDrawable or setBackgroundResource that padding is lost forever. ...
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Team city unmet requirement: MSBuildTools12.0_x86_Path exists

I have a TeamCity install on x32 Server2008 windows machine. I've run the .net 4.5 web install. I've also copied over the files from my x64 machine based on this article so that I didn't need to install vs2012 (though, I did have the change the path to remove x86 on the 32bit machine): ...
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Add new field to every document in a MongoDB collection

How can I add a new field to every document in an existent collection? 5 Answers 5 ...
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android webview geolocation

I have to retrieve a user's location in a WebView . I do this with the following Javascript: 6 Answers ...
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How to run two jQuery animations simultaneously?

...elements simultaneously? I need the opposite of this question Jquery queueing animations . 7 Answers ...
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SQLAlchemy: how to filter date field?

... In fact, your query is right except for the typo: your filter is excluding all records: you should change the <= for >= and vice versa: qry = DBSession.query(User).filter( and_(User.birthday <= '1988-01-17',...