To add or modify column when the rules

To a table increase columns of the rules.

Any time how family specified is not null columns.

How to increase not null columns?

Click the steps:

1. Add column but don't set is not null.

2. Will this one line are added.

3. Will this column modified for not null.

Modifying column rules:

Can at any time to increase character the width of the column

You can at any time, increase the number type column of figures.

You can at any time, increase or decrease the number type column of the number of digits after the decimal point

When the table is empty

Can change the data type

Can reduce the character column width

Can be less number of the column number of positions.

Or delete a table after the re-created.