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  2. Comma-separated values - Wikipedia

    en.wikipedia.org/wiki/Comma-separated_values

    CSV is a delimited text file that uses a comma to separate values (many implementations of CSV import/export tools allow other separators to be used; for example, the use of a "Sep=^" row as the first row in the *.csv file will cause Excel to open the file expecting caret "^" to be the separator instead of comma ","). Simple CSV implementations ...

  3. PostgreSQL - Wikipedia

    en.wikipedia.org/wiki/PostgreSQL

    Data in child tables will appear to exist in the parent tables, unless data is selected from the parent table using the ONLY keyword, i.e. SELECT * FROM ONLY parent_table;. Adding a column in the parent table will cause that column to appear in the child table.

  4. Postgres-XL - Wikipedia

    en.wikipedia.org/wiki/Postgres-XL

    The name "Postgres-XL" stands for "eXtensible Lattice". [2] The last release of Postgres-XL was made in September 2018 and development ceased in October. [3] The website has also gone offline. Postgres-XL is based on Postgres-XC, an earlier distributed PostgreSQL system developed by NTT Data and EnterpriseDB. [4]

  5. LibreOffice - Wikipedia

    en.wikipedia.org/wiki/LibreOffice

    Copy and paste spreadsheet data directly in an existing table; UTF-8 and UTF-16 text file can be saved without byte order mark (BOM) Calc. Support Signature Line in the spreadsheet; Data Validation supports custom formulas; Do multivariate regression analysis via regression tool; Add the REGEX function to match or replace text with regular ...

  6. List of free and open-source software packages - Wikipedia

    en.wikipedia.org/wiki/List_of_free_and_open...

    Gnumeric – spreadsheet program of the GNOME Project; Calligra Sheets – spreadsheet component of the Calligra Suite in KDE; Pyspread – spreadsheet which uses Python for macro programming, and allows each cell to contain data, the results of a calculation, a Python program, or the results of a Python program.

  7. Referential integrity - Wikipedia

    en.wikipedia.org/wiki/Referential_integrity

    A table (called the referencing table) can refer to a column (or a group of columns) in another table (the referenced table) by using a foreign key. The referenced column(s) in the referenced table must be under a unique constraint, such as a primary key. Also, self-references are possible (not fully implemented in MS SQL Server though [5]).

  8. Select (SQL) - Wikipedia

    en.wikipedia.org/wiki/Select_(SQL)

    The following example of a SELECT query returns a list of expensive books. The query retrieves all rows from the Book table in which the price column contains a value greater than 100.00. The result is sorted in ascending order by title. The asterisk (*) in the select list indicates that all columns of the Book table should be included in the ...

  9. OpenOffice.org - Wikipedia

    en.wikipedia.org/wiki/OpenOffice.org

    Microsoft Excel 4/5/95 XLS, XLW, XLT Yes Yes Microsoft Excel 97–2003 XLS, XLW, XLT Yes Yes DocBook: XML Yes Yes since 1.1 WordPerfect: WPD Yes WordPerfect Suite 2000/Office 1.0 WPS Yes StarOffice StarWriter 3/4/5 SDW, SGL, VOR Yes Yes Ichitaro 8/9/10/11 JTD, JTT Yes ApportisDoc (Palm) PDB Yes Yes Requires Java Hangul WP 97 HWP Yes Microsoft ...