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SQL includes operators and functions for calculating values on stored values. SQL allows the use of expressions in the select list to project data, as in the following example, which returns a list of books that cost more than 100.00 with an additional sales_tax column containing a sales tax figure calculated at 6% of the price.
In a database, a table is a collection of related data organized in table format; consisting of columns and rows.. In relational databases, and flat file databases, a table is a set of data elements (values) using a model of vertical columns (identifiable by name) and horizontal rows, the cell being the unit where a row and column intersect. [1]
One of several templates for styling individual table cells with standard contents and colors. Template parameters [Edit template data] This template prefers inline formatting of parameters. Parameter Description Type Status text 1 text to be displayed instead of the default; if this doesn't work put the text after the template, possibly with a vertical bar | in between Default (template ...
Category:Wikipedia template editors {{List to table}}: template and its maintenance category: Category:Articles requiring tables {{Horizontal TOC}}: good for country lists in table format. {{Diagonal split header}}: for identifying both rows and columns, in a diagonally split top-left cell (also: {{Diagonal split header 2}})
The first click on the header cell will sort the column’s data in ascending order, a second click of the same arrow descending order, and a third click will restore the original order of the entire table. For example; a third click causes List of countries by intentional homicide rate to reset to its original order by subregion.
For example, nested tables (tables inside tables) should be separated into distinct tables when possible. Here is a more advanced example, showing some more options available for making up tables. Users can play with these settings in their own table to see what effect they have.
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The formal definition of a database schema is a set of formulas (sentences) called integrity constraints imposed on a database. [citation needed] These integrity constraints ensure compatibility between parts of the schema. All constraints are expressible in the same language.