Esproc, Data, Data Analysis, Development, Esproc Spl.
algorithm. For example, the following code is to get the in-group Top 10: SELECT * FROM ( SELECT *, ROW_NUMBER() OVER (PARTITION BY Area ORDER BY Amount DESC) rn FROM Orders ) WHERE rn<=10 There is a big difference between this SQL code and the previous one. This code needs to use the sub-query and