Published on August 26th, 2008 by hispanic in Web Design
by hispanic
The SQL or Structure Query Language is primarily designed to retrieve as well as manage data in an RDBMS or a relational database management system. It is also the standard programming language used for updating or gathering information from a database. SQL also makes it possible for the user to create as well as modify the database schema. It also provides control management over the database object.
A unique feature of SQL is its ability for a database programmer to create and modify an SQL database schema. At the same time, it also allows easy control and management over a database object. Unlike the C or BASIC (Beginner’s All-Purpose Symbolic Instruction Code) programming language, SQL is a set-based language. Aside from that, it is also a declarative query language that have additional extensions. These extensions make the language more functional and powerful.
SQL is further divided into different language elements. These include the statements that have an effect on both the data and the schema, the queries that have the ability to retrieve the data, the expressions that are designed to produce tables or scalar values, the predicates that are used to specify the conditions, the clauses that are the main components of both queries and statements, the whitespace that is used for formatting the SQL code, and the semicolon statement that is a part of the SQL grammar.
Among the elements, the queries are the most common operations in the SQL database. It is performed with a declarative keyword SELECT, which retrieves the data from a table. However, the SELECT query has no standard effect on the stored data. In some cases, the SELECT query has an effect in the database similar to Microsoft SQL Server’s SELECT INTO.
Although the standard SQL is functional in many ways, a number of critics suggest that it lacks cross-platform portability between the vendors or database system. Most systems do not implement the entire SQL standard due to its complexity and size. Should you wish to learn more about this type of database, feel free to search the Internet for more available resources.
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