What are different aggregate functions in SQL?

Question

An aggregate function in SQL performs a calculation on multiple values and returns a single value. SQL provides many aggregate functions that include avg, count, sum, min, max, etc. An aggregate function ignores NULL values when it performs the calculation, except for the count function. 6 дней назад

What are the 6 aggregate functions of SQL?

Transact-SQL provides the following aggregate functions:APPROX_COUNT_DISTINCT.AVG.CHECKSUM_AGG.COUNT.COUNT_BIG.GROUPING.GROUPING_ID.MAX.

What are the 5 aggregate functions in SQL?

SQL Aggregate FunctionsCOUNT FUNCTION. COUNT function is used to Count the number of rows in a database table. ... SUM Function. Sum function is used to calculate the sum of all selected columns. ... AVG function. The AVG function is used to calculate the average value of the numeric type. ... MAX Function. ... MIN Function.

What are different types of aggregate function explain with an example?

Example: Write a query to return number of rows where salary > 20000. COUNT(*): Counts all the number of rows of the table including null. COUNT( COLUMN_NAME): count number of non-null values in column. COUNT( DISTINCT COLUMN_NAME): count number of distinct values in a column.

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