Souy Soeng

SQL joins: INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

From Basics to Advanced: SQL Commands for Every Skill Level SQL (Structured Query Language) manages and manipulates relational databases. Whether you…

Understanding SQL ALTER TABLE Statement The SQL ALTER TABLE statement is used to modify the structure of an existing table. It allows you to add, d…

Understanding SQL Primary Key In SQL, a Primary Key is a constraint that uniquely identifies each record in a table. It ensures that no two rows in …

SQL Tutorial: A Complete Beginner's Guide Structured Query Language (SQL) is the standard language used for managing and manipulating relational …

What is SQL Syntax? SQL (Structured Query Language) syntax refers to the rules and structure used to write SQL statements. These statements are the f…

What is SQL? SQL (Structured Query Language) is a standard programming language used for managing and manipulating relational databases. It is the ba…

SQL Sample Database A sample database is a simplified dataset used to demonstrate SQL concepts like creating tables, querying data, applying constrai…

Understanding SQL ORDER BY Clause The SQL ORDER BY clause is used to sort the result set of a query based on one or more columns. By default, it so…

Understanding SQL SELECT The SQL SELECT statement is used to retrieve data from one or more tables in a database. It is one of the most fundamental …

Understanding SQL DISTINCT The SQL DISTINCT keyword is used to remove duplicate rows from the result set of a query. It ensures that only unique val…

Understanding SQL WHERE Clause The SQL WHERE clause is used to filter records in a database table based on specific conditions. It allows you to re…

Understanding SQL FETCH The SQL FETCH clause is used to retrieve a specific number of rows from a query result. It is often combined with the OFFSET…

Understanding SQL LIMIT The SQL LIMIT clause is used to restrict the number of rows returned by a query. It is particularly useful when working with…

SQL Comparison Operators

What is the SQL BETWEEN Operator? The BETWEEN operator in SQL is used to filter rows based on a range of values. It is often used in the WHERE or …

What is the SQL OR Operator? The SQL OR operator is a logical operator used to combine two or more conditions in an WHERE or HAVING clause. It …

What is the SQL AND Operator? The AND operator in SQL is a logical operator used in the WHERE or HAVING clause to combine two or more conditions.…

What are SQL Logical Operators? SQL Logical Operators are used to combine multiple conditions in a query WHERE or HAVING clause to refine the data …

What is the SQL LIKE Operator? The LIKE operator in SQL is used to search for a specified pattern in a column. It is commonly used in WHERE clause…