Data Control Language is a subset of SQL used to grant permissions to end users for executing certain commands in a database. It allows a database administrator to customize user privileges for security and control. The language is user-friendly and uses basic commands like GRANT and REVOKE to manipulate privileges.
Data Control Language is a subset of Structured Query Language (SQL), which is typically used to extract and control information stored in a database. While the basic SQL language deals with data manipulation within the database, the data control language deals with granting specific permissions to end users to execute certain types of commands within the database. The data control language gives a database administrator the ability to manipulate and customize the privileges of an end user to strengthen security and maintain a hierarchy of control over information in the database.
Like SQL, the data control language is a natural language. This means that the commands used within the language try to be as free from jargon and ambiguity as possible, providing a friendlier environment for people who are not very tech savvy to use the database features. Unlike other languages such as C++, Java and Visual Basic, which use commands that are not intuitively understandable to the layman, SQL and the data control language are formulated to make their command strings fairly basic. For example, in SQL, the command “SELECT All FROM Employees WHERE Salary>=50,000” will return a list of all people in an “Employees” database whose salary is equal to or greater than $50,000 US Dollars (USD).
The data control language is a little different, as its goal is to manipulate privileges rather than information in the database. The two most important commands in the data control language are the GRANT and REVOKE elements. Through these, as their names suggest, the database administrator can grant or deny a specific privilege to a database end user. Common privileges include the ability to connect to the database using the CONNECT command; select rows and columns from the database using the SELECT command; insert new information into the database using the INSERT command; update the existing information within the database using the UPDATE command; delete existing information from the database using the DELETE command; or execute specific commands or code within the database using the EXECUTE command.
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