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Google supports searching in content of DOCX, XLSX, and PPTX files and also searching for these filetypes. Found files can be viewed directly in a converted HTML view. [70] Apple Spotlight supports indexed searching of Office Open XML files. Copernic Desktop Search for Windows supports indexed searching of Office Open XML files. [71]
A relational database (RDB [1]) is a database based on the relational model of data, as proposed by E. F. Codd in 1970. [2]A Relational Database Management System (RDBMS) is a type of database management system that stores data in a structured format using rows and columns.
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...