WebApr 11, 2024 · 可以使用spark sql中的窗口函数来实现sql中的group by后取组内top n。具体 … WebSep 9, 2024 · The GROUP BY statement can only be used in a SQL SELECT statement. The GROUP BY statement must be after the WHERE clause. (If one exists.) The GROUP BY statement must be before the ORDER BY clause. (If one exists.) To filter the GROUP BY results, you must use the HAVING clause after the GROUP BY.
SQL GROUP BY Statement - W3School
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