Mar 12, 2025 · It includes fundamental SQL commands like CREATE DATABASE and DROP DATABASE, data manipulation commands such as INSERT INTO and UPDATE, as well as querying techniques using SELECT, WHERE and aggregate functions.

BY clause of the SELECT statement. The GROUP BY clause splits the result-set into groups of values and the aggregate function can be used to return a single value for each group. The most commonly used SQL aggregate functions are: Aggregate functions ignore null …

Jan 5, 2018 · Question: What is an SQL Function? A SQL function is a command that performs specific operations on data. Common SQL functions include SUM() for adding numbers, LOWER() for converting text to lowercase, and COUNT() for counting items in a dataset.

Learn SQL to summarize data with aggregate functions and GROUP BY, helping you analyze large datasets and make data-driven decisions.

SQL functions are used to perform calculations and manipulations on data stored in a relational database. There are many types of SQL functions, including aggregate functions, date functions, string functions, ranking functions, analytical functions, and math functions.

Jan 1, 2024 · SQL provides much in-build function to perform operation of table data, these functions can be with-in SQL statements or queries, and can also be used within the programming environment provided by the SQL Server (Transact-SQL) database, such as stored procedures, functions, triggers, etc.

Mar 19, 2025 · SQL functions are prewritten actions that can be called on a cell, record or database to flexibly manipulate and extract information for further analysis. Take a closer look at the main types of SQL functions and how to use each.

SQL has many built-in functions that enable you to perform calculations on data. SQL aggregate functions perform calculation on a set of values and return a single value. The following table summarizes some useful aggregate functions: SQL string functions perform operation on a string input value and return a string or numeric value.

Expressions can be used at several points in SQL statements, such as in the ORDER BY or HAVING clauses of SELECT statements, in the WHERE clause of a SELECT, DELETE, or UPDATE statement, or in SET statements. Expressions can be written using values from several sources, such as literal values, column values, NULL, variables, built-in functions and operators, loadable functions, and stored ...

Oct 1, 2024 · SQL functions are routines that accept inputs, perform computations or operations, and return a result. They are used to encapsulate logic and facilitate data manipulation within SQL queries. Functions can operate on various data types such as strings, numbers, dates, and more.