sqlite3 Man page

Resume Wikipedia de Bogofilter

Bogofilter est un logiciel libre sous licence GPL de classification de courrier électronique en spam s’il est indésirable ou ham dans le cas contraire, basé sur une analyse statistique de l’en-tête et du contenu du message. Le programme est capable d’apprendre à partir des classifications opérées par l’utilisateur. Il a été originellement écrit par Eric S. Raymond, et est actuellement maintenu par David Relson, Matthias Andree et Greg Louis.
Ce logiciel utilise la technique statistique de filtrage bayésien pour effectuer sa classification. Sa première utilisation en matière de spam a été décrite dans l’article de Paul Graham A Plan For Spam. Gary Robinson, dans son weblog Rants, a proposé des améliorations pour rendre la discrimination entre Spam et ham plus pertinente. Le principal algorithme de Bogofilter se base sur le paramètre f(w) et la technique décrite par Fisher du Khi-2.
Bogofilter est appelé par un script du MDA, après la partie de vérification de validité de l’émetteur dans la chaine des filtres anti-spam, afin de classer un message entrant en spam ou ham en se basant sur des dictionnaires stockés dans une base Berkeley DB, SQLite3 ou encore QDBM). Bogofilter est aussi à l’aise sur du texte brut que sur du HTML. Il supporte également les messages au format MIME. En revanche, il ignore les pièces jointes telles que les images.
Bogofilter est écrit en C, et peut fonctionner sous Linux, FreeBSD, NetBSD, OpenBSD, Solaris, Mac OS X, HP-UX, AIX et d’autres systèmes.

SQLITE3(1) General Commands Manual SQLITE3(1)


sqlite3 – A command line interface for SQLite version 3


sqlite3 [options] [databasefile] [SQL]

sqlite3 is a terminal-based front-end to the SQLite library that can
evaluate queries interactively and display the results in multiple for‐
mats. sqlite3 can also be used within shell scripts and other applica‐
tions to provide batch processing features.


To start a sqlite3 interactive session, invoke the sqlite3 command and
optionally provide the name of a database file. If the database file
does not exist, it will be created. If the database file does exist,
it will be opened.

For example, to create a new database file named “mydata.db”, create a
table named “memos” and insert a couple of records into that table:

$ sqlite3 mydata.db
SQLite version 3.8.8
Enter “.help” for instructions
sqlite> create table memos(text, priority INTEGER);
sqlite> insert into memos values(‘deliver project description’, 10);
sqlite> insert into memos values(‘lunch with Christine’, 100);
sqlite> select * from memos;
deliver project description|10
lunch with Christine|100

If no database name is supplied, the ATTACH sql command can be used to
attach to existing or create new database files. ATTACH can also be
used to attach to multiple databases within the same interactive ses‐
sion. This is useful for migrating data between databases, possibly
changing the schema along the way.

Optionally, a SQL statement or set of SQL statements can be supplied as
a single argument. Multiple statements should be separated by semi-

For example:

$ sqlite3 -line mydata.db ‘select * from memos where priority > 20;’
text = lunch with Christine
priority = 100

The interactive interpreter offers a set of meta-commands that can be
used to control the output format, examine the currently attached data‐
base files, or perform administrative operations upon the attached
databases (such as rebuilding indices). Meta-commands are always pre‐
fixed with a dot (.).

A list of available meta-commands can be viewed at any time by issuing
the ‘.help’ command. For example:

sqlite> .help
.backup ?DB? FILE Backup DB (default “main”) to FILE
.bail on|off Stop after hitting an error. Default OFF
.clone NEWDB Clone data into NEWDB from the existing database
.databases List names and files of attached databases
.dump ?TABLE? … Dump the database in an SQL text format
If TABLE specified, only dump tables matching
LIKE pattern TABLE.
.echo on|off Turn command echo on or off
.eqp on|off Enable or disable automatic EXPLAIN QUERY PLAN
.exit Exit this program
.explain ?on|off? Turn output mode suitable for EXPLAIN on or off.
With no args, it turns EXPLAIN on.
.fullschema Show schema and the content of sqlite_stat tables
.headers on|off Turn display of headers on or off
.help Show this message
.import FILE TABLE Import data from FILE into TABLE
.indices ?TABLE? Show names of all indices
If TABLE specified, only show indices for tables
matching LIKE pattern TABLE.
.load FILE ?ENTRY? Load an extension library
.log FILE|off Turn logging on or off. FILE can be stderr/stdout
.mode MODE ?TABLE? Set output mode where MODE is one of:
csv Comma-separated values
column Left-aligned columns. (See .width)
html HTML

insert SQL insert statements for TABLE
line One value per line
list Values delimited by .separator string
tabs Tab-separated values
tcl TCL list elements
.nullvalue STRING Use STRING in place of NULL values
.once FILENAME Output for the next SQL command only to FILE


.open ?FILENAME? Close existing database and reopen FILE


.output ?FILENAME? Send output to FILENAME or stdout
.print STRING… Print literal STRING
.prompt MAIN CONTINUE Replace the standard prompts
.quit Exit this program
.read FILENAME Execute SQL in FILE


.restore ?DB? FILE Restore content of DB (default “main”) from FILE
.save FILE Write in-memory database into FILE
.schema ?TABLE? Show the CREATE statements
If TABLE specified, only show tables matching
LIKE pattern TABLE.
.separator STRING ?NL? Change separator used by output mode and .import
NL is the end-of-line mark for CSV
.shell CMD ARGS… Run CMD ARGS… in a system shell
.show Show the current values for various settings
.stats on|off Turn stats on or off
.system CMD ARGS… Run CMD ARGS… in a system shell
.tables ?TABLE? List names of tables
If TABLE specified, only list tables matching
LIKE pattern TABLE.
.timeout MS Try opening locked tables for MS milliseconds
.timer on|off Turn SQL timer on or off
.trace FILE|off Output each SQL statement as it is run
.vfsname ?AUX? Print the name of the VFS stack
.width NUM1 NUM2 … Set column widths for “column” mode
Negative values right-justify


sqlite3 has the following options:

-bail Stop after hitting an error.

-batch Force batch I/O.

Query results will be displayed in a table like form, using
whitespace characters to separate the columns and align the out‐

-cmd command
run command before reading stdin

-csv Set output mode to CSV (comma separated values).

-echo Print commands before execution.

-init file
Read and execute commands from file , which can contain a mix of
SQL statements and meta-commands.

Turn headers on or off.

-help Show help on options and exit.

-html Query results will be output as simple HTML tables.

Force interactive I/O.

-line Query results will be displayed with one value per line, rows
separated by a blank line. Designed to be easily parsed by
scripts or other programs

-list Query results will be displayed with the separator (|, by
default) character between each field value. The default.

-mmap N
Set default mmap size to N

-nullvalue string
Set string used to represent NULL values. Default is ” (empty

-separator separator
Set output field separator. Default is ‘|’.

-stats Print memory stats before each finalize.

Show SQLite version.

-vfs name
Use name as the default VFS.

sqlite3 reads an initialization file to set the configuration of the
interactive environment. Throughout initialization, any previously
specified setting can be overridden. The sequence of initialization is
as follows:

o The default configuration is established as follows:

mode = LIST
separator = “|”
main prompt = “sqlite> ”
continue prompt = ” …> ”

o If the file ~/.sqliterc exists, it is processed first. can be found
in the user’s home directory, it is read and processed. It should gen‐
erally only contain meta-commands.

o If the -init option is present, the specified file is processed.

o All other command line options are processed.


The sqlite3-doc package.


This manual page was originally written by Andreas Rottmann
, for the Debian GNU/Linux system (but may be used by
others). It was subsequently revised by Bill Bumgarner
and further updated by Laszlo Boszormenyi .

Fri Oct 31 10:41:31 EDT 2014 SQLITE3(1)