insert or load ? best practices and performance

[Gabriel Madeira]

Hi every one. I would like to know the best practice for the problem I have:

I have a table that everyday has to be fully updated. I have a txt file with all rows to be imported. I would like to know somethings:

1 - before loading the txt file is better drop the table and create it again or a simple delete * from table will resolve ?
2 - to insert the rows into the table should I use the insert clause or use the command line to load the file ?