Help:Introduction to tables with Wiki Markup/2
Introduction to tables
How and why
Editing tables
The basics
Expanding tables
Adding rows and columns
Summary
Review of what you've learned
When you use the 
toolbar button to insert a table, it actually inserts markup text into the article for you to edit. There are two common ways to lay out this markup that you amy see around Wikipedia:
Both of which look like:
| Header C1 | Header C2 | Header C3 |
|---|---|---|
| R1C1 | R1C2 | R1C3 |
| R2C1 | R2C2 | R2C3 |
All you have to do is place this where you want it in the article, edit it to match the information you're trying to display, and hit save. You can add more headers by adding more entries in the header section, more rows, or remove headers or rows if you're looking for a smaller table.
