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28 lines
1.2 KiB
MySQL
28 lines
1.2 KiB
MySQL
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-- { echo }
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-- just something basic
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select number, count() over (partition by intDiv(number, 3) order by number) from numbers(10);
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-- proper calculation across blocks
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select number, max(number) over (partition by intDiv(number, 3) order by number desc) from numbers(10) settings max_block_size = 2;
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-- not a window function
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select number, abs(number) over (partition by toString(intDiv(number, 3))) from numbers(10); -- { serverError 63 }
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-- no partition by
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select number, avg(number) over (order by number) from numbers(10);
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-- no order by
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select number, quantileExact(number) over (partition by intDiv(number, 3)) from numbers(10);
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-- can add an alias after window spec
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select number, quantileExact(number) over (partition by intDiv(number, 3)) q from numbers(10);
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-- can't reference it yet -- the window functions are calculated at the
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-- last stage of select, after all other functions.
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select q * 10, quantileExact(number) over (partition by intDiv(number, 3)) q from numbers(10); -- { serverError 47 }
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-- should work in ORDER BY though
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select number, max(number) over (partition by intDiv(number, 3) order by number desc) m from numbers(10) order by m desc, number;
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