Grouping Functions Concept
- The GROUP BY clause is used to group rows by the specified column(s).
- Aggregate functions (SUM, COUNT, AVG, etc.) perform calculations on each group.
SQL Server Group Functions
The group function in SQL Server provides a powerful tool for performing calculations on groups of rows, allowing you to group data based on specific criteria. This function is important when you want to analyze and summarize information from multiple records in a data structure. The basic group functions are COUNT, SUM, AVG, MAX, and MIN.
Syntax:
The basic syntax for using the grouping function involves a GROUP BY clause with the custom aggregation function. Here’s the whole process:
SELECT column1, aggregate_function(column2)
FROM table_name
GROUP BY column1;
- column1: The group of columns in which you want to pass the data.
- aggregate_function(column2): The group function (e.g., COUNT, SUM, AVG, MAX, MIN) applied to the new columns of each group.
- table_name: The name of the table containing the data.
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