MIN and MAX Aggregate Functions in SQL Server

MIN and MAX Aggregate Functions in SQL Server

MIN and MAX Aggregate Functions in SQL Server. This article demonstrates the use of the MIN and MAX aggregate functions in SQL Server that return values for a given range stored in a table.

SQL Server Functions

In database systems in general and in SQL Server in particular, functions are pieces of code that take zero or one input and return a single output or an array.

Table-Valued Functions which are typically user-defined can return an array, but in-built SQL Server functions are typically Scalar-Valued Functions. The third class of functions in SQL Server are Aggregate-Valued Functions. The MIN and MAX SQL Server functions are Aggregate-Valued Functions.

Window Functions are a relatively new class. They perform calculations like aggregate functions but do it over a set of rows related to the current row. While an aggregate function is likely to yield a single result by working on a column, a Window Function is more likely to yield a result for each row.

The SQL Server Functions classification can also ground on data type – String Functions, Numeric Functions, and Date Functions. We can deduce that String Functions operate on string values, e.g., LENGTH().

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