Hi again Ying,
> How do we delete data from the database?
> If i had loaded data named contig 1 into the database,
> would the data be replaced if i were to load another
> set of database by the same name, contig 1??
No, the mechanism for deletion is more flexible than that. It uses a
command "-D" in the .ace file. For example if you have a record in the
database like this,
Sequence : "Contig5002"
DNA_homol BE443570 Phrap 587 1 587 1 587
DNA_homol BE446512 Phrap 200 1 200 1 200
you can delete the whole record by putting this line in a .ace file:
-D Sequence : "Contig5002"
Or you can delete just the first value with:
Sequence : "Contig5002"
-D DNA_homol BE443570
There's some documentation about this at
http://www.acedb.org/Cornell/configuration_guide.html, under "The ace
edit language".
See also the "acediff" program which is included with the ACEDB software
in the bin/ directory and will generate a correct "-D file" from two input
files, old and new. There's more info about this at
http://greengenes.cit.cornell.edu/acedoc/aceloading.html
cheers,
- Dave
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