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https://www.geeksforgeeks.org/sql-data-types/

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SQL Data Types - GeeksforGeeks

SQL Data Types are very important in relational databases.It ensures that data is stored efficiently and accurately. Data types define the type of value a column can hold, such as numbers, text, or dates.Understanding SQL Data Types is critical for database administrators, developers, and data analysts to design robust databases and optimize performance.

https://www.postgresql.org/docs/current/functions.html

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Chapter 9. Functions and Operators - PostgreSQL

PostgreSQL provides a large number of functions and operators for the built-in data types. This chapter describes most of them, although additional special-purpose functions appear in relevant sections of the manual. Users can also define their own functions and operators, as described in Part V.The psql commands \df and \do can be used to list all available functions and operators, respectively.

https://airbyte.com/data-engineering-resources/advanced-sql-conce...

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15 Advanced SQL Concepts With Examples (2025 Edition)

Before performing your advanced SQL operations on the data, you must centralize data collected from different sources leveraging data integration tools like Airbyte. Airbyte is a data integration platform that leverages data connectors and robust data pipelines to support modern ELT approaches.

https://www.mygreatlearning.com/blog/sql-commands/

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SQL Commands (DDL, DML, DQL, DCL, TCL) with Examples - Great Learning

A SQL Query is a type of SQL statement that asks the database to return data. It always starts with the SELECT command. Five Types of SQL Commands. SQL commands are divided into five main groups based on their use. Knowing these groups helps you understand what different commands are meant to do. The five types of SQL commands are:

https://www.tpointtech.com/dbms-relational-algebra

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DBMS Relational Algebra - Tpoint Tech - Java

It is a binary operation as it operators on two relations; The division operation is suited to queries that include the phrase "for all". It is very rarely used in database applications. Difference between the Cartesian product and Join. The Cartesian product and join operation seems to be similar but them actually different.

https://sqlite.org/lang_expr.html

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SQL Language Expressions - SQLite

The -> and ->> operators are "extract"; they extract the RHS component from the LHS. For an example, see JSON subcomponent extraction. The % operator casts both of its operands to type INTEGER and then computes the remainder after dividing the left integer by the right integer. The other arithmetic operators perform integer arithmetic if both ...

https://intellipaat.com/blog/tutorial/sql-tutorial/sql-data-types...

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SQL Data Types - Practical Guide with Examples for 2025 - Intellipaat

Correct data types will optimize the storage and also secure the data integrity, which increases the performance of the query. In this article, you will learn about what the data types in SQL are along with their performance, use cases, and functionality. Table of Contents: What Are SQL Data Types? Different Data Types in SQL. Numeric Data ...

https://www.guvi.in/blog/sql-queries-with-examples/

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15 Most Common SQL Queries with Examples - GUVI Blogs

In SQL, the JOIN statement is used to combine rows from two or more tables based on a related column between them. There are different types of joins, including INNER JOIN, LEFT JOIN (or LEFT OUTER JOIN), RIGHT JOIN (or RIGHT OUTER JOIN), and FULL JOIN (or FULL OUTER JOIN). Syntax: SELECT columns FROM table1 JOIN table2 ON table1.column ...

https://www.geeksforgeeks.org/introduction-of-relational-algebra-...

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Introduction of Relational Algebra in DBMS - GeeksforGeeks

These operators help perform more complex queries by combining basic operations to meet specific data retrieval needs. 1. Join Operators. Join operations in relational algebra combine data from two or more relations based on a related attribute, allowing for more complex queries and data retrieval. Different types of joins include: Inner Join

https://www.postgresql.org/docs/current/functions-comparison.html

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9.2. Comparison Functions and Operators - PostgreSQL

Ordinary comparison operators yield null (signifying “ unknown ”), not true or false, when either input is null.For example, 7 = NULL yields null, as does 7 <> NULL.When this behavior is not suitable, use the IS [ NOT] DISTINCT FROM predicates:. a IS DISTINCT FROM b a IS NOT DISTINCT FROM b. For non-null inputs, IS DISTINCT FROM is the same as the <> operator.

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Бета

Частният преглед ви позволява да разглеждате уебсайтове анонимно. Тази функция може да не се поддържа на всички сайтове.

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Бета

Частният преглед ви позволява да разглеждате уебсайтове анонимно. Тази функция може да не се поддържа на всички сайтове.

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