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Introduction to. SQL. Uses of Databases SQL. Some Relational Database Concepts SQL supports basic arithmetic operations to create new. Some examples of open source and commercial DBMS include MySQL, Oracle, PostgreSQL,. SQL Server, Microsoft Access, MongoDB. A database system hides certainSQL concepts . To view or download the PDF version of this document, select SQL programming (about There are several basic types of SQL statements. Part I introduces you to the basic concepts of SQL and explains how to create objects within your database. Part II provides you with. This tutorial is prepared for beginners to help them understand the basic as well as the advanced concepts related to SQL languages. This tutorial will give you Numeric data types. • Integer numbers: INT, INTEGER, SMALLINT, BIGINT. • Floating-point (real) numbers: REAL, DOUBLE , FLOAT.