SQLITE3(1) | General Commands Manual | SQLITE3(1) |
sqlite3
—
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 formats. sqlite3
can also be used within
shell scripts and other applications 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 3.1.3 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 sqlite>
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 session. 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-colons.
For example:
$ sqlite3 -line mydata.db 'select * from memos where priority > 20;' text = lunch with Christine priority = 100
A list of available meta-commands can be viewed at any time by issuing the '.help' command. For example:
sqlite> .help .databases List names and files of attached databases .dump ?TABLE? ... Dump the database in an SQL text format .echo ON|OFF Turn command echo on or off .exit Exit this program .explain ON|OFF Turn output mode suitable for EXPLAIN on or off. .header(s) 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 on TABLE .mode MODE ?TABLE? Set output mode where MODE is one of: csv Comma-separated values column Left-aligned columns. (See .width) html HTML <table> code 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 Print STRING in place of NULL values .output FILENAME Send output to FILENAME .output stdout Send output to the screen .prompt MAIN CONTINUE Replace the standard prompts .quit Exit this program .read FILENAME Execute SQL in FILENAME .schema ?TABLE? Show the CREATE statements .separator STRING Change separator used by output mode and .import .show Show the current values for various settings .tables ?PATTERN? List names of tables matching a LIKE pattern .timeout MS Try opening locked tables for MS milliseconds .width NUM NUM ... Set column widths for "column" mode sqlite>
sqlite3
has the following options:
-init
file-echo
-header
-noheader
-column
-html
-line
-list
-separator
separator-nullvalue
stringNULL
values. Default is “\” (empty
string).-version
-help
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:
mode = LIST separator = "|" main prompt = "sqlite> " continue prompt = " ...> "
-init
option is present, the specified file
is processed.December 16, 2012 | NetBSD 9.4 |