SQL Database Guide
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.
The way this language is designed, it is very capable of modifying a database schema. With it, it can provide much control the way data is stored, managed, and organized into a database project. SQL is superior to other types of programming languages like C and BASIC because it is a set-based and declarative type of language. It is also capable of extensions, making it more functional and flexible.
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.
SELECT is the most commonly used keyword in an SQL database. It is a type of query that retrieves data stored in a table from a database. However, SELECT can only be used to retrieve data and has no standard effect on the stored data.
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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August 26th, 2008 at 12:16 pm
Nice read. Got anything else on SQL? I wouldn’t mind using a few articles written by you on the topic on my blog.
August 27th, 2008 at 6:43 am
Schema can be an obstacle if your business is constantly changing/growing. With changing requirements it gets harder for SQL to regularly change the database schema and retain all its functionality. There are many technologies in the market which have dropped the schema concept altogether and created some very interesting and scalable software. Poseidon Database is one such. Offered by Brainwave Platform, a complete development and deployment suite along with its excellent database removes the need for a schema completely.
This gives the ability for you to maintain your applications easily regardless of requirement changes in any phase of development.