Difference between Oracle Database and MS SQL Server

Core difference

There are many different relational database management systems (RDBMS), among which Oracle Database and MS SQL Server are the most popular. There are many differences between these two RDBMS. The main difference between Oracle Database and MS SQL Server is that MS SQL Server uses Transact SQL / T-SQL Structured Query Language which is an extension of SQL originally designed by Sybase and used by MS. While Oracle database uses procedural language/SQL.

What is Oracle?

Oracle Database is an object relational database management system developed by Oracle Corporation and released on July 22, 2014. It is written in assembly language, C, and C++ and is available in many languages. Oracle RDBMS stores data logically in the form of table spaces and physically in the form of data files as “data files”. Table spaces can contain various types of memory segments such as: data segments, index segments, etc. The segments in turn comprise one or more extensions comprising groups of contiguous data blocks. Data blocks form the basic units of data storage. Oracle Database Administration tracks your computer’s data storage with the help of information stored in the “SYSTEM” table space. The “SYSTEM” tablespace contains the data dictionary and contains indexes and clusters by default.

What is MS SQL Server?

MS SQL Server is an RDBMS developed by Microsoft. It is written in C and C++ and is available in more than twelve international languages. It is a software product with the primary function of storing and retrieving data as requested by other software applications that may be running on the same computer or on another computer over a network, including the Internet. MS SQL Server uses T-SQL and ANSI SQL as main query languages. In the latest version of 2014, MS has introduced many features which are: High Availability and Disaster Recovery, Enterprise Scalability through Computer, Network and Storage, Security and Compliance, Local to Cloud Consistent Data Platform, Fatal Access in familiar tools like Excel, scalable data warehouse,

Key differences
  1. The transaction control system in both databases is different. MS SQL Server will run each task individually by default and it will be more difficult to undo changes if errors are found along the way. Whereas in Oracle changes are made only in memory and nothing is committed until an explicit “COMMIT” statement is given with some exceptions.
  2. MS SQL Server organizes all objects like tables, views and procedures by database names. In Oracle Database, all database objects are grouped by schemas and users.
  3. Oracle Database interface is GUI and SQL and MS SQL Server is SQL only.
  4. MS SQL Server supports the D language which is not supported by Oracle Database.
  5. Oracle Database is proprietary software. MS SQL Server is open source software.
  6. Oracle Database is available for Windows, Linux, Solaris, HP-UX, OS X, z/OS, and AIX. MS SQL Server is available for Windows, Linux, OS X, FreeBSD, and Solaris.

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