While tabulating every field using the wildcard (*) character is useful, you will notice that there are a number of Splunk internal fields, such as _raw, that appear in the table. We can use the fields command before the table command to remove fields as follows:
index=main sourcetype=access_combined | fields - sourcetype, index, _raw, source date* linecount punct host time* eventtype | table *
If we do not include the minus (-) character after the fields command, Splunk will keep the specified fields and remove all other fields.