SQL (Structured Query Language) is a language to operate databases; it includes Database Creation, Database Deletion, Fetching Data Rows, Modifying & Deleting Data rows, etc.

Our SQL tutorial helps you learn SQL (Structured Query Language) in simple and easy steps so that you can start your database programming quickly. It covers most of the important …

An SQL operator can be either a unary or binary operator. A unary operator (example unary + or unary - ) uses only one operand to perform the unary operation, whereas the binary operator …

The SQL WHERE clause is used to filter records based on specific conditions. It ensures that only the rows meeting the given criteria are affected or returned by a SELECT, UPDATE, or …

SQL server constantly monitors memory usage to assess resource contention (or availability); its job is to make sure that there is a certain amount of free space available at all times.

A Primary Key in SQL is a column (or a combination of columns) that uniquely identifies each row in a table. It ensures that no two rows have the same value in the primary key column (s) and …

In this chapter, we will discuss the Basic Syntax of PL/SQL which is a block-structured language; this means that the PL/SQL programs are divided and written in logical blocks of code.

SQL comments are notes you can add inside your SQL code to explain what the code does. The database ignores these comments when running queries, but they help developers read, …

In SQL, a Foreign Key is a column in one table that refers to the Primary Key in another table, creating a connection between the two tables. A foreign key ensures referential integrity by …

The BETWEEN operator in SQL is used to filter data within a specific range of values. It can be applied to numeric, date, or text columns. The range specified with BETWEEN is inclusive, …