Although the COLUMN statement describes the overall structure of the table columns, the columns themselves can have their own definitions just like headers and footers. A column definition can define what the column should look like, what the column header should contain, and what data column should be used. It can even calculate the data values themselves. Putting columns in a table is just like putting headers in a table. You have two choices:
1. Use the column statement to create columns based on the data columns in a data set7.
2. Define the column within a table definition.
You can also use a combination of these methods where you define the overall structure of the table using the column statement and then create column ...