Aggregate Functions as Window Functions
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MariaDB starting with 10.2
Window functions were first introduced in MariaDB 10.2.0.
It is possible to use aggregate functions as window functions. An aggregate function used as a window function must have the OVER clause. For example, here's COUNT() used as a window function:
select COUNT(*) over (order by column) from table;
MariaDB currently allows these aggregate functions to be used as window functions:
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