Group Functions in Query Statements in SQL Server

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Q

What Are Group Functions in Query Statements in SQL Server?

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A

Group functions are functions applied to a group of rows. Examples of group functions are:

COUNT(*) - Returns the number of rows in the group.
MIN(exp) - Returns the minimum value of the expression evaluated on each row of the group.
MAX(exp) - Returns the maximum value of the expression evaluated on each row of the group.
AVG(exp) - Returns the average value of the expression evaluated on each row of the group.
SUM(exp) - Returns the sum value of the expression evaluated on each row of the group.
COUNTDISTINCT(exp) - Returns the number of distinct values of the expression evaluated on each row of the group.

⇒ Using Group Functions in the SELECT Clause in SQL Server

⇐ Filtering Out Duplications in the Returning Rows in SQL Server

⇑ Using SELECT Statements and GROUP BY Clauses in SQL Server

⇑⇑ SQL Server Database Tutorials

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How To Count Duplicated Values in a Column? in SQL Server
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