Implement queries that use mathematical, string, and date functions

The use of mathematical, string, and date functions is essential when designing and implementing native applications using Microsoft Azure Cosmos DB. These functions provide powerful capabilities for performing calculations, manipulating strings, and working with dates within your queries. In this article, we will explore how to leverage these functions to enhance the functionality and performance of your Azure Cosmos DB applications.

1. Mathematical Functions

Mathematical functions allow you to perform various calculations on numerical data within your queries. Azure Cosmos DB supports a rich set of mathematical functions, including:

• ABS: This function returns the absolute value of a specified number. It can be used to convert negative numbers to positive numbers.

SELECT ABS(-10)

• CEILING: This function returns the smallest integer greater than or equal to a specified number. It can be used to round up a numerical value.

SELECT CEILING(3.14)

• FLOOR: This function returns the largest integer less than or equal to a specified number. It can be used to round down a numerical value.

SELECT FLOOR(3.14)

2. String Functions

String functions enable you to manipulate and perform operations on text data within your queries. Azure Cosmos DB provides a wide range of string functions, including:

• CONCAT: This function concatenates two or more strings together.

SELECT CONCAT("Hello", "World")

• LENGTH: This function returns the length of a specified string.

SELECT LENGTH("Hello")

• LOWER: This function converts a specified string to lowercase.

SELECT LOWER("HELLO")

• UPPER: This function converts a specified string to uppercase.

SELECT UPPER("hello")

3. Date Functions

Date functions allow you to perform operations on date and time data within your queries. Azure Cosmos DB supports various date functions, including:

• CURRENT_TIMESTAMP: This function returns the current date and time.

SELECT CURRENT_TIMESTAMP()

• DATEADD: This function adds a specific number of date or time units to a specified date.

SELECT DATEADD("day", 7, "2022-01-01")

• DATEDIFF: This function calculates the difference between two specified dates.

SELECT DATEDIFF("day", "2022-01-01", "2022-01-10")

These are just a few examples of the mathematical, string, and date functions available in Azure Cosmos DB. By utilizing these functions, you can enhance your query capabilities and perform complex calculations, string manipulations, and date operations within your native applications.

In conclusion, when designing and implementing native applications using Microsoft Azure Cosmos DB, it is important to leverage the mathematical, string, and date functions available. These functions provide powerful tools for performing calculations, manipulating strings, and working with dates within your queries. By using these functions effectively, you can enhance the functionality and performance of your Azure Cosmos DB applications.