For example, to insert three new columns, click and drag the mouse on three row cells in data columns A, B and C. Right-click to bring up the options. Point over "Insert" and click "Table Columns ...

If you have a column named CASE in a table and you want to specify it in a PROC SQL step, you can use the SAS data set option RENAME= to rename that column for the duration of the query. You can also ...