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SQL Server vs Oracle Oracle database (simply referred to as Oracle) is an Object Relational Database Management System (ORDBMS) that supports a large range of platforms. Oracle DBMS is available in different versions ranging from versions for personal use and enterprise class versions. Microsoft SQL server is a Relational Database Server produced by Microsoft. It […]
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Update vs Alter Update and Alter are two SQL (Structured Query Language) commands used for modifying databases. Update statement is used to update existing records in a database. Update is a Data Manipulation Language (DML) statement. Alter SQL command is used to modify, delete or add a column to an existing table in a database. […]
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SQL Server Express 2005 vs SQL Server Express 2008 | SQL Server Express 2005 vs 2008 SQL Server is a relational model database server produced by Microsoft. And SQL Server Express is a scaled down version of SQL Server which is free. SQL Server Express 2008 (which is the scaled down version of SQL Server […]
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PL-SQL vs T-SQL T-SQL (Transact SQL) is an extension of SQL developed by Microsoft. T-SQL is used in Microsoft SQL Server. PL/SQL (Procedural Language/Structured Query Language) is also a procedural extension for SQL developed by Oracle. PL/SQL is a main programming language embedded in the Oracle database. PL/SQL PL/SQL is a procedural extension for SQL […]
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SQL vs T-SQL Query languages are used for accessing and manipulating databases. SQL and T-SQL are two of the popular query languages used today. Structured Query Language (SQL) is a computer language for databases. It is used for accessing and manipulating data in Relational Database Management Systems (RDMS). T-SQL (Transact SQL) is an extension of […]
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SAP vs ORACLE The acronym SAP stands for Systems, Applications and Products in Data Processing. SAP is an Enterprise Resource Planning (ERP) software that integrates several business applications, which are designed for specific business areas. Today, many large corporations such as IBM and Microsoft use SAP products for running their businesses. Oracle database (simply referred […]
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实体vs Attribute Entity-relationship modeling (ERM) technique is widely used for modeling databases. Entity-relationship modeling is the process of coming up with an abstract and conceptual representation of data. One of the main building blocks of ERM is an entity. Entity represents a real world object or a thing that can stand on its own […]
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Database vs Schema A system intended for easily organizing, storing and retrieving large amounts of data, is called a database. In other words, a database holds a bundle of organized data (typically in digital form) for one or more users. Databases, often abbreviated DB, are classified according to their content, such as document-text, bibliographic and […]
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Semi Join vs Bloom Join Semi join and Bloom join are two joining methods used in query processing for distributed databases. When processing queries in distributed databases, data needs to be transferred between databases located in different sites. This could be an expensive operation depending on the amount of data that needs to be transferred. […]
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Database vs Instance Oracle is a RDBMS (object-relational database management system) that widely used in enterprises. It is developed by the Oracle Corporation. An Oracle system is made up of at least one Instance and a database. Instance is a collection of processes that communicate with the data storage. Database is the actual storage, which […]