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  2. Comparison of data modeling tools - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_data...

    Update database and/or update model No Open ModelSphere: Conceptual, Logical, physical IDEF1X, IE (Crow’s foot), and more Yes Yes Update database and/or update model No Oracle SQL Developer Data Modeler Logical, physical Barker, IE (Crow’s foot), and Bachman Yes Yes Update database and/or update model Yes PowerDesigner

  3. SQL-92 - Wikipedia

    en.wikipedia.org/wiki/SQL-92

    SQL-92 was the third revision of the SQL database query language. Unlike SQL-89, it was a major revision of the standard. Aside from a few minor incompatibilities, the SQL-89 standard is forward-compatible with SQL-92. The standard specification itself grew about five times compared to SQL-89.

  4. List of spreadsheet software - Wikipedia

    en.wikipedia.org/wiki/List_of_spreadsheet_software

    Airtable – a spreadsheet-database hybrid, with the features of a database but applied to a spreadsheet. Coda; EditGrid – access, collaborate and share spreadsheets online, with API support; discontinued since 2014; Google Sheets – as part of Google Workspace; iRows – closed since 31 December 2006; JotSpot Tracker – acquired by Google Inc.

  5. Date rolling - Wikipedia

    en.wikipedia.org/wiki/Date_rolling

    Modified following business day: the payment date is rolled to the next business day unless doing so would cause the payment to be in the next calendar month, in which case the payment date is rolled to the previous business day. Many institutions have month-end accounting procedures that necessitate this. Previous business day: the payment ...

  6. Star schema - Wikipedia

    en.wikipedia.org/wiki/Star_schema

    Consider a database of sales, perhaps from a store chain, classified by date, store and product. The image of the schema to the right is a star schema version of the sample schema provided in the snowflake schema article. Fact_Sales is the fact table and there are three dimension tables Dim_Date, Dim_Store and Dim_Product.

  7. Functional database model - Wikipedia

    en.wikipedia.org/wiki/Functional_Database_Model

    A functional database consists of a set of dimensions which are used to construct a set of cubes. A dimension is a finite set of elements, or members, that identify business data, e.g., time periods, products, areas or regions, line items, etc. Cubes are built using any number of dimensions.

  8. Relational database - Wikipedia

    en.wikipedia.org/wiki/Relational_database

    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 .

  9. Time formatting and storage bugs - Wikipedia

    en.wikipedia.org/wiki/Time_formatting_and...

    This problem can be seen in the spreadsheet program Microsoft Excel as of 2023, which stores dates as the number of days since 31 December 1899 (day 1 is 1 January 1900) with a fictional leap day in 1900 if using the default 1900 date system. Alternatively, if using the 1904 date system, the date is stored as the number of days since 1 January ...