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1. www.sqltutorial.org › sql-window-functions › sql-lagSQL LAG() Function Explained By Practical Examples

   www.sqltutorial.org › sql-window-functions › sql-lag

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   SQL LAG() is a window function that provides access to a row at a specified physical offset which comes before the current row. In other words, by using the LAG() function, from the current row, you can access data of the previous row, or from the second row before the current row, or from the third row before current row, and so on.

   • SQL Last_Value Function

     Summary: in this tutorial, you will learn how to use the SQL...

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     SQL Window Functions: Explained (with examples)

     16 Aug 2022

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     SQL Tutorial - Using functions

     14 Mar 2022

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     6:43

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     SQL ROUND Function

     11 Jun 2021

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3. learnsql.com › blog › coalesce-function-sqlHow to Use the COALESCE () Function in SQL - LearnSQL.com

   learnsql.com › blog › coalesce-function-sql

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   May 24, 2022 · We can use the SQL COALESCE () function to replace the NULL value with a simple text: SELECT first_name, last_name, COALESCE (marital_status,'Unknown') FROM persons. In the above query, the COALESCE () function is used to return the value ‘ Unknown ’ only when marital_status is NULL.

4. stackoverflow.com › questions › 4413694How do I use a SQL function inside my SQL query

   stackoverflow.com › questions › 4413694

   Try using the function like a field... this is for TSQL. SELECT number, -- start function (SELECT function_field_name FROM dbo.MAGIC(number)) AS magic_number -- end function FROM dbo.NUMBERS

5. www.w3schools.com › sql › sql_aggregate_functionsSQL Aggregate Functions - W3Schools

   www.w3schools.com › sql › sql_aggregate_functions

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   The most commonly used SQL aggregate functions are: MIN() - returns the smallest value within the selected column. MAX() - returns the largest value within the selected column. COUNT() - returns the number of rows in a set. SUM() - returns the total sum of a numerical column.

6. www.digitalocean.com › how-to-use-functions-in-sqlHow To Use Functions in SQL - DigitalOcean

   www.digitalocean.com › how-to-use-functions-in-sql

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   • 27 Understanding Relational Databases.
   • 27 Why You Should Learn SQL.
   • 27 Understanding SQL Constraints.
   • 27 How To Create and Manage Tables in SQL.

7. learnsql.com › blog › lead-and-lag-functions-in-sqlThe LAG Function and the LEAD Function in SQL - LearnSQL.com

   learnsql.com › blog › lead-and-lag-functions-in-sql

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   Jul 17, 2020 · Learn to use the SQL LEAD function for data analysis: compare trends, manage inventory, and forecast effectively with practical examples.

8. People also ask

   How does SQL work?

   • SQL can also perform calculations and manipulate data through the use of functions. For instance, you can use functions to retrieve product prices rounded to the nearest dollar, calculate the average number of product purchases, or determine the number of days until the warranty on a given purchase expires.

   How To Use Functions in SQL - DigitalOcean

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   What are string manipulation functions in SQL?

   • String manipulation functions in SQL enable you to alter the values stored in columns holding text when processing the SQL query. They can be used, among others, to convert cases, concatenate data from multiple columns, or perform search and replace operations.

   How To Use Functions in SQL - DigitalOcean

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   How do I use aggregate functions in SQL?

   • In this example, you used aggregate functions to calculate statistical values from the whole inventory table at once, taking all rows into account for the summary. With SQL, it is also possible to divide the rows in the table into groups, and then calculate aggregate values for those groups separately.

   How To Use Functions in SQL - DigitalOcean

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   What is a function example in SQL Server?

   • The function (EXAMPLE) takes the column name (price) as an argument enclosed in parentheses. This portion of the query tells the database to execute the function EXAMPLE over the values of the column price and return the results of this operation.

   How To Use Functions in SQL - DigitalOcean

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   How does aggregate function work?

   • Using aggregate functions this way results in the database returning a single row with temporary columns representing the values of aggregate computations. The source rows are used for calculation internally but are not returned through the query.

   How To Use Functions in SQL - DigitalOcean

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   What is a mathematical function in SQL?

   • Mathematical functions operate on numerical values, such as the book price or the number of books in stock in the sample database. They can be used to perform calculations within the database to conform the results to your requirements. Rounding is one of the most commonly used applications of mathematical functions in SQL.

   How To Use Functions in SQL - DigitalOcean

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9. www.geeksforgeeks.org › window-functions-in-sqlWindow functions in SQL - GeeksforGeeks

   www.geeksforgeeks.org › window-functions-in-sql

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   Aug 22, 2024 · Syntax: SELECT column_name1, . window_function(column_name2) OVER([PARTITION BY column_name1] [ORDER BY column_name3]) AS new_column. FROM table_name; . window_function= any aggregate or ranking function . column_name1= column to be selected. column_name2= column on which window function is to be applied.