Microsoft SQL Database Server Functions
Learn how to perform various functions on a Microsoft SQL Database Server, including aggregate, ranking, CAST, CONVERT, and SUBSTRING functions. This course is perfect for beginners in Database Administration and Development.
What you’ll learn
- Setup SQL Server
- Execute CAST Function on SQL Database Server
- Execute CONVERT Function on SQL Database Server
- Execute SUBSTRING Function on SQL Database Server
- Execute RANK Functions on SQL Database Server
- Execute Aggregate Functions on SQL Database Server
There are various types of functions that can be performed on a Microsoft SQL Database Server. This course will cover a few of them.
Aggregate functions
Aggregate functions perform a calculation on a set of values and return a single value. They are allowed in the select list or the HAVING clause of a SELECT statement. You can use an aggregation in combination with the GROUP BY clause to calculate the aggregation on categories of rows. Use the OVER clause to calculate the aggregation on a specific range of value. The OVER clause cannot follow the GROUPING or GROUPING_ID aggregations.
All aggregate functions are deterministic, which means they always return the same value when they run on the same input values.
Ranking functions
Ranking functions return a ranking value for each row in a partition. Depending on the function that is used, some rows might receive the same value as other rows. Ranking functions are nondeterministic.
CAST function converts an expression from one datatype to another datatype. If the conversion fails, the function will return an error. Otherwise, it will return the converted value.
CONVERT function converts an expression from one datatype to another datatype. If the conversion fails, the function will return an error. Otherwise, it will return the converted value
The SUBSTRING() extracts a substring with a specified length starting from a location in an input string .
Who this course is for:
- Beginners to Database Administration
- Beginners to Database Development
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