Check out example codes for "html5 table". It will help you in understanding the concepts better.

Code Example 1

<table>
    <thead>
        <tr>
            <th colspan="2">The table header</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>The table body</td>
            <td>with two columns</td>
        </tr>
    </tbody>
</table>

Code Example 2

<table style="width:100%"> 
  <tr>
      <th>Firstname</th>
      <th>Lastname</th> 
      <th>Age</th>
  </tr>
  <tr>
      <td>Jill</td>
      <td>Smith</td> 
      <td>50</td>
  </tr>
  <tr>
      <td>Eve</td>
      <td>Jackson</td> 
      <td>94</td>
  </tr>
</table>

Code Example 3

Table

Code Example 4

<table>
  <thead>
    <tr>
      <th>header1</th>
      <th>header2</th>
      <th>header3</th>
    </tr>
   </thead>
   <tbody>
     <tr>
       <td>text1.1</td>
       <td>text1.2</td>
       <td>text1.3</td>
     </tr>
     <tr>
       <td>text2.1</td>
       <td>text2.2</td>
       <td>text2.3</td>
     </tr>
     <tr>
       <td>text3.1</td>
       <td>text3.2</td>
       <td>text3.3</td>
     </tr>
     <tr>
     </tr>
  </tbody>
</table>

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