The Wolfram Language has a built-in high-level interface to all standard SQL databases that allows immediate searching, reading, and writing of arbitrary data and expressions, as well as supporting general SQL database features, including discovery, result sets, and transactions.
Dataset — represent the contents of an SQL or no-SQL database
OpenSQLConnection — connect to any JDBC-compatible SQL database
SQLExecute — execute any SQL command, generating Wolfram Language output
DatabaseExplorer — use a GUI to explore databases and generate notebooks
Import — import entire MDB etc. databases
SemanticImport — import semantically, converting to Wolfram Language representations