Functioneel, strikt noodzakelijk voor de website. Google Analytics, gebruikt voor het verbeteren van over medium eggs website.

Off your first purchase by subscribing to our newsletter. We also share information about your use of our site with our social media, advertising and analytics partners. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Determines the partitioning and ordering of a rowset before the associated window function is applied.

That is, the OVER clause defines a window or user-specified set of rows within a query result set. A window function then computes a value for each row in the window. You can use the OVER clause with functions to compute aggregated values such as moving averages, cumulative aggregates, running totals, or a top N per group results. PARTITION BY that divides the query result set into partitions. ORDER BY that defines the logical order of the rows within each partition of the result set. RANGE that limits the rows within the partition by specifying start and end points within the partition.

It requires ORDER BY argument and the default value is from the start of partition to the current element if the ORDER BY argument is specified. If you don’t specify any argument, the window functions will be applied on the entire result set. PARTITION BY Divides the query result set into partitions. The window function is applied to each partition separately and computation restarts for each partition. If PARTITION BY is not specified, the function treats all rows of the query result set as a single partition. Function will be applied on all rows in the partition if you don’t specify ORDER BY clause. PARTITION BY value_expression Specifies the column by which the rowset is partitioned.