SQL is a standard language for storing, manipulating and retrieving data in databases. Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, …

RDBMS is the basis for SQL, and for all modern database systems such as MS SQL Server, IBM DB2, Oracle, MySQL, and Microsoft Access. The data in RDBMS is stored in database objects called tables.

Each table is identified by a name (e.g. "Customers" or "Orders"), and contain records (rows) with data. In this tutorial we will use the well-known Northwind sample database (included in MS Access and …

The query() method takes a query expression as a string parameter, which has to evaluate to either True of False. It returns the DataFrame where the result is True according to the query expression.

What is SQL? SQL is the standard language for dealing with Relational Databases. SQL is used to insert, search, update, and delete database records.

SQL Database SQL Database tutorials can be found here: SQL Create DB SQL Drop DB SQL Backup DB SQL Create Table SQL Drop Table SQL Alter Table SQL Constraints SQL Not Null SQL Unique …

What is XQuery? XQuery is to XML what SQL is to databases. XQuery is designed to query XML data.

Learn MySQL MySQL is a widely used relational database management system (RDBMS). MySQL is free and open-source. MySQL is ideal for both small and large applications. Start learning MySQL …

Demo Database Below is a selection from the Customers table used in the examples:

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