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The two most commonly used classes are "wikitable" and "wikitable sortable"; the latter allows the reader to sort the table by clicking on the header cell of any column. |+ caption Required for accessibility purposes on data tables, and placed only between the table start and the first table row. ! header cell Optional.
A dash after a number no longer breaks default numerical sorting of a column. Therefore, a range (30–40) now works. A plus sign after a number breaks default numerical sorting if it is in one of the first 5 cells in a column. A plus sign in an otherwise empty cell breaks default numerical sorting of a column.
If a table is created in Visual Editor, the dialog includes a checkbox to "Make table sortable". If you check this box, then a reader can sort the table by any column, by clicking on the header cell for that column. Existing tables, or tables created in wikitext can be made sortable by adding the wikitable sortable class to the top of the table:
For each table, insert an alpha-prefix on each column (making each row-token "|-" to sort as column zero, like prefix "Row124col00"), then sort into a new file, and then de-prefix the column entries. Again, bear in mind, the tedious hand-editing of items in each row is often faster than the potential delay of automated edits gone awry.
Help:Sortable tables#Sorting buttons in a separate row; Each row must have the same number of cells as the other rows, so that the number of columns in the table remains consistent. With colspan and rowspan cells can span several columns or rows; (see § Mélange, below)
For example, a table of 128 rows with a Boolean column requires 128 bytes a row-oriented format (one byte per Boolean) but 128 bits (16 bytes) in a column-oriented format (via a bitmap). Another example is the use of run-length encoding to encode a column.
1.1.1 Styling the table. ... 1.1.3 Styling a column. 2 Sample tables. Toggle Sample tables subsection. 2.1 "Wikipedia editions" example. 2.2 "Details of Wikipedia ...
Adding data-sort-type="number" to the relevant column header solves many numerical sorting problems. See Help:Sortable tables § Forcing a column to have a particular data type . This template can be useful when building a sortable table in which a column contains both numbers and text.