Relational database

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Relational databases are the most popular databases. The software manages information in tables, as well as the links between related records in these tables. "Dr. Edgar Frank Codd invented the relational database while working for IBM in 1970."[1]

What an example relational database table looks like:

customer_id last_name first_name city
10039 Smith John Huston
10178 Cole Christen Wortham
10052 Franks Andrew Austin
10131 Klinfelt Mark Thornberry
10014 Franklin Mary Austin

Well-known Relational Databases

The most well-known relational database management systems (RDBMS) are:

  • DB2, developed by IBM, which also formalized the Structured Query Language (SQL) which became the industry standard.
  • Sybase
  • Oracle
  • Microsoft SQL Server
  • MySQL