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Tables can only be sorted vertically by clicking on the column headers (topmost cells). When a column header is clicked, the rows of the table reorder themselves in an up-and-down manner, based on the values in that column. However, there is no functionality to sort columns horizontally by clicking on a cell in the leftmost row.
There is no easy way to align a column of numbers so that the decimal points align. See multiple ways below. One way to align columns of numbers at the decimal point is to use two columns, with the first right-justified and the second left-justified.
For complex tables, when a header spans two columns or rows, use ! scope="colgroup" colspan="2" | or ! scope="rowgroup" rowspan="2" | respectively to clearly identify the header as a column header of two columns or a row header of two rows.
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.
To clearly define relationships and avoid accessibility issues, use ! scope="colgroup" colspan="2" | when a column header spans two columns and ! scope="rowgroup" rowspan="2" | when a row header spans two rows, adjusting the number if spanning more.
Unlike section headings, they often begin with or consist entirely of numbers (such as model numbers, dates, version numbers, etc.). Table headers do not automatically generate link anchors the way section headings do; use the {} template to turn a header's text (or part of it) into an anchor.
{{sticky header}} - makes column headers stick to the top of the page while scrolling through table data. {{sticky table start}} - makes row and/or column headers stick to the top and/or left of the page while scrolling through table data. {} - moves the sorting arrows under the headers.
In a table column (or other presentation) in which all values can be expressed with a single power of 10, consider giving e.g. × 10 7 once in the column header, and omitting it in the individual entries. (Markup: {{e|7}}) In both notations, the number of digits indicates the precision.