VCF stands for "vCard File" or "Virtual Contact File." It is a standardized electronic business card format. VCF files typically contain contact information, including names, addresses, phone numbers, email addresses, and more. This format is widely used for sharing and exchanging contact details between devices and applications. VCF files often have the ".vcf" file extension. The MIME type for VCF is "text/vcard."
BEGIN:VCARD
VERSION:3.0
FN:John Doe
ORG:Company Inc.
TEL:+123456789
EMAIL:john.doe@email.com
END:VCARD
Compatibility: VCF files are widely supported by various platforms, making them compatible for sharing contact information across different devices and applications.
Standardized Format: The vCard format is standardized, ensuring consistency and interoperability in storing and exchanging contact details.
Rich Information: VCF files can store a variety of contact information, including names, addresses, phone numbers, emails, and more.
Easy Import/Export: VCF files can be easily imported into and exported from contact management applications, simplifying the process of managing and sharing contact information.
Explore more about VCF on Wikipedia.
SQL stands for "Structured Query Language." It is a domain-specific language used for managing and manipulating relational databases. SQL provides a standardized way to interact with databases, enabling users to create, retrieve, update, and delete data. It is widely employed for tasks such as database design, data querying, and data manipulation. SQL is not limited to a specific database system and is supported by various database management systems (DBMS) like MySQL, PostgreSQL, Oracle, and Microsoft SQL Server. Common SQL operations include SELECT (querying data), INSERT (adding new data), UPDATE (modifying existing data), and DELETE (removing data).
-- Selecting data from a table
SELECT FirstName, LastName FROM Employees WHERE Department = 'IT';
-- Inserting new data
INSERT INTO Customers (CustomerID, CustomerName, Email) VALUES (1, 'ABC Company', 'abc@example.com');
-- Updating existing data
UPDATE Products SET Price = 29.99 WHERE ProductID = 101;
-- Deleting data
DELETE FROM Orders WHERE OrderID = 500;
Declarative Language: SQL is a declarative language, meaning users specify the result they want, and the database management system determines the best way to retrieve it.
Scalability: SQL databases can handle large amounts of data and scale well with the growth of data and users.
Data Integrity: SQL supports constraints and relationships, ensuring the integrity of data stored in the database.
Interoperability: SQL is supported by a wide range of database systems, promoting interoperability across different platforms.
Explore more about SQL on Wikipedia.