You can use the Select Columns page to determine which columns of data are imported. If your data set is within the recommended size, it is fastest to close this dialog without clearing any of the column check boxes. The check boxes are all checked by default.
Note: Your data set is above the recommended size if it meets any of the following criteria:
The number of rows exceeds 1000
The number of columns exceeds 100
The number of rows multiplied by the number of columns exceeds 20,000
To select a column, check the box next to the column name This list contains all of the columns in your data source. Column names are listed in the left column and sample values in the right. Columns that are not viewable data types, such as binary data types, are dimmed.