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must appear in the GROUP BY clause or be used in an aggregate function

... Yes, this is a common aggregation problem. Before SQL3 (1999), the selected fields must appear in the GROUP BY clause[*]. To workaround this issue, you must calculate the aggregate in a sub-query and then join it with itself to get the additional columns you'd need to show: SEL...
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Split string every nth character?

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Creating a blurring overlay view

... 561 You can use UIVisualEffectView to achieve this effect. This is a native API that has been fine-t...
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How to apply a Git patch to a file with a different name and path?

...it the changes and create a patch from that commit with git format-patch -1 HEAD . Now, I have a second repository that contains a file that has the same contents as hello.test but is placed in a different directory under a different name: ./blue/red/hi.test . How do I go about applying the aforem...
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What is the exact difference between currentTarget property and target property in javascript

... 451 Basically, events bubble by default so the difference between the two is: target is the elemen...
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postgresql return 0 if returned value is null

... 182 use coalesce COALESCE(value [, ...]) The COALESCE function returns the first of its argume...
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What is &amp used for

... 130 & is HTML for "Start of a character reference". & is the character reference for ...
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How to change a django QueryDict to Python Dict?

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How do CUDA blocks/warps/threads map onto CUDA cores?

... 124 Two of the best references are NVIDIA Fermi Compute Architecture Whitepaper GF104 Reviews ...
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How to run multiple .BAT files within a .BAT file

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