window function
The term "window function" is used in both signal processing and databases, each with distinct but conceptually related meanings.
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Definition
C1Signal Processing
(technical, academic)A mathematical tool that isolates a specific part of a signal for analysis by being zero outside a defined interval.
Example
- Using a window function helps in analyzing the frequency components of a signal more effectively.
B2Databases
(technical, SQL)A function that calculates values across a set of rows related to the current row, used for operations like ranking and running totals.
Example
- The SQL query used a window function to calculate the cumulative sales for each month.
Similar
Terms that have similar or relatively close meanings to "window function":