Freeze multiple columns in html table using css

1. How do I freeze multiple columns in a table in HTML?
2. How do I combine 3 columns in HTML?

How do I freeze multiple columns in a table in HTML?

To freeze the row/column we can use a simple HTML table and CSS. HTML: In HTML we can define the header row by <th> tag or we can use <td> tag also. Below example is using the <th> tag. We also put the table in DIV element to see the horizontal and vertical scrollbar by setting the overflow property of the DIV element.

How do I combine 3 columns in HTML?

To merge table columns in HTML use the colspan attribute in <td> tag. With this, merge cells with each other. For example, if your table is having 4 rows and 4 columns, then with colspan attribute, you can easily merge 2 or even 3 of the table cells.