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To use PHP with an HTML form, the URL of the PHP script is specified in the action attribute of the form tag. The target PHP file then accesses the data passed by the form through PHP's $_POST or $_GET variables, depending on the value of the method attribute used in the form. Here is a basic form handler PHP script that will display the ...
Database normalization. Database normalization is the process of structuring a relational database in accordance with a series of so-called normal forms in order to reduce data redundancy and improve data integrity. It was first proposed by British computer scientist Edgar F. Codd as part of his relational model .
Database transaction. A database transaction symbolizes a unit of work, performed within a database management system (or similar system) against a database, that is treated in a coherent and reliable way independent of other transactions. A transaction generally represents any change in a database. Transactions in a database environment have ...
Rollback (data management) In database technologies, a rollback is an operation which returns the database to some previous state. Rollbacks are important for database integrity, because they mean that the database can be restored to a clean copy even after erroneous operations are performed. [1] They are crucial for recovering from database ...
BDE's application program interface provides direct C and C++ optimized access to the database engine, as well as BDE's built-in drivers for dBASE, Paradox, FoxPro, Access, and text databases. The core database engine files consist of a set of DLLs that are fully re-entrant and thread-safe. Included with BDE are a set of supplemental tools and ...
Data definition language. In the context of SQL, data definition or data description language ( DDL) is a syntax for creating and modifying database objects such as tables, indices, and users. DDL statements are similar to a computer programming language for defining data structures, especially database schemas.
In his work regarding HTML5, Wang studied HTML5 markup language and DOM, structuring of Web documents and forms, and important JavaScript APIs related to HTML5. He explored XML and PHP/MySQL, and also proposed page templates, user login, database access, session control, and form processing. Computational thinking
Structured Query Language ( SQL) ( pronounced S-Q-L; historically "sequel") [4] [5] is a domain-specific language used to manage data, especially in a relational database management system (RDBMS). It is particularly useful in handling structured data, i.e., data incorporating relations among entities and variables.