In XML data storage, the data is stored in a file which represents an XML Schema of the data. To read the data, you have to pull and open the entire file in memory and use technics like xpath to get the data element you want. In SQL data storage, the data is stored in a database ( usually relational database). To read the data, you simple sent an SQL query to the database. The database management engine analysis the query and get the required data elements you ask for in your query which is finally sent to you as a reply.
SQL and "File Based Databases" can't really be compared directly as they refer to two different concepts. SQL is a language for querying databases. "File Based Databases" often refer to data storage that you manage through your own methods, rather than using a language like SQL to query and manipulate the data. For example, MySQL stores its data in files on the hard drive. To store and manipulate the data and its structure, you use SQL queries. MySQL takes care of the data behind the scenes, and provides methods for sorting and arranging the data returned to queries. You never deal directly with the files that MySQL uses to store the data.
SQLSQL is a language that can communicate with Oracle server to access the data.It is based on ANSI standards.There is no continuation character.Keywords cannot be abbreviated.Use functions to manipulate the data.SQL*PLUSIt recognizes SQL statement and sends them to the server.Is an Oracle proprietary.There is a continuation character.Keywords can be abbreviated.Use commands to manipulate the data.
SQL (structured query Language) is standard language that is used in Mysql, Oracle, and Sql server. only difference between SQL server, Oracle, and Mysql. Sql server is micosoft product & a data Base Management System(DBMS) Oracle is also a DBMS by Oracle. mysql is open source and free by SUN also DBMS. All above used SQL in their Queries............ enjoy.........
SQL is an abbreviation for Structured Query Language. SQL is a means to request data from a database. SQL is a standards based langage that has many versions approved by the American National Standards Institute (ANSI). There are many versions of ANSI-SQL and most databases support specific versions of ANSI-SQL. SQL Server is a database management system that was originally created by Sybase. Microsoft bought the rights from Sybase to market their own version of SQL Server on the Microsoft Windows operating system. Sybase still has versions of SQL Server on other operating systems. When people refer to SQL Server, they typically mean "Microsoft SQL Server." Microsoft SQL Server is a database management system (DBMS) that utilizes SQL (or more specifically Transact-SQL, or T-SQL) as a means to extract data from it's database tables.
ADO is active x data object. It is used to access database with the help of data controls and objects as well. it is an extended form of RDO and DAO. RDO is remote data object which is used to access server site data. data in this case reside on the sql server. and we use sql queries to access data. in this we write a sql command and then squ server processes it and gives back the result. DAO is data access object. it is used to access data with the help of program and some data controls. it provides an extention to data controls and data bound controls. DAO helps in accessing data with various conditions or quries.
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