Moving Fields
You can move one or more fields of a table.
To move
one field, proceed as follows:The selected field is cut and loaded into the buffer.
The field is inserted in the table at the new position.
To move several fields, proceed as follows:
All the fields of the selected block are highlighted.
The selected block is cut and loaded into the buffer.
The selected fields are inserted at the new position in the table.

The order of the fields in the ABAP Dictionary can differ from the order of the fields on the database. Changing the order of the fields (with the exception of key fields) in the ABAP Dictionary therefore does not result in a change on the database. In particular, a table conversion is not necessary.
If the table is a check table, you cannot change the order of the key fields. In this case you must first delete the corresponding foreign key.