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how to exclude null values in array_agg like in string_agg using postgres?
...g to collect names, I get my names separated by commas, but in case there is a null value, that null is also taken as a name in the aggregate. For example :
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How to use LINQ to select object with minimum or maximum property value
I have a Person object with a Nullable DateOfBirth property. Is there a way to use LINQ to query a list of Person objects for the one with the earliest/smallest DateOfBirth value.
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MySQL JOIN the most recent row only?
...ave a table customer that stores a customer_id, email and reference. There is an additional table customer_data that stores a historical record of the changes made to the customer, i.e. when there's a change made a new row is inserted.
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Why Doesn't C# Allow Static Methods to Implement an Interface?
Why was C# designed this way?
25 Answers
25
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Can I store the .git folder outside the files I want tracked?
...backup/git_repos/myfiles. From looking at the git docs, I've tried doing this:
9 Answers
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How to get line count of a large file cheaply in Python?
...ine count of a large file (hundreds of thousands of lines) in python. What is the most efficient way both memory- and time-wise?
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How to write DataFrame to postgres table?
There is DataFrame.to_sql method, but it works only for mysql, sqlite and oracle databases. I cant pass to this method postgres connection or sqlalchemy engine.
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How do you get the “object reference” of an object in java when toString() and hashCode() have been
...n object in Java for debugging purposes.
I.e. to make sure that the object is the same (or different) depending on the situation.
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How to prevent browser to invoke basic auth popup and handle 401 error using Jquery?
... authorization request using basic auth. I have successfully implemented this using jquery. However when I get 401 error basic auth browser popup is opened and jquery ajax error callback is not called.
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Google Docs/Drive - number the headings
Is it possible to number the headings in a Google Docs/Drive document?
6 Answers
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