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---
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obj: concept
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website: https://www.sqlite.org/index.html
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mime: "application/vnd.sqlite3"
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extension: ["db", "sqlite", "sqlite3"]
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---
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# SQLite
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SQLite is a C-language library that implements a small, fast, self-contained, high-reliability, full-featured, [SQL](languages/SQL.md) database engine. SQLite is the most used database engine in the world. SQLite is built into all mobile phones and most computers and comes bundled inside countless other applications that people use every day.
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SQLite is an embedded [SQL](languages/SQL.md) database engine. Unlike most other [SQL](languages/SQL.md) databases, SQLite does not have a separate server process. SQLite reads and writes directly to ordinary disk files. A complete [SQL](languages/SQL.md) database with multiple tables, indices, triggers, and views, is contained in a single disk file. The database file format is cross-platform - you can freely copy a database between 32-bit and 64-bit systems or between big-endian and little-endian architectures. These features make SQLite a popular choice as an Application File Format.
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SQLite is an embedded [SQL](languages/SQL.md) database engine. Unlike most other [SQL](languages/SQL.md) databases, SQLite does not have a separate server process. SQLite reads and writes directly to ordinary disk files. A complete [SQL](languages/SQL.md) database with multiple tables, indices, triggers, and views, is contained in a single disk file. The database file format is cross-platform - you can freely copy a database between 32-bit and 64-bit systems or between big-endian and little-endian architectures. These features make SQLite a popular choice as an Application File Format.
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## Usage
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Usage: `sqlite3 [OPTIONS] FILENAME [SQL]`
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FILENAME is the name of an SQLite database. A new database is created if the file does not previously exist.
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### Options
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| Option | Description |
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| --------------------- | -------------------------------------------------- |
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| `-append` | append the database to the end of the file |
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| `-ascii` | set output mode to 'ascii' |
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| `-bail` | stop after hitting an error |
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| `-batch` | force batch I/O |
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| `-box` | set output mode to 'box' |
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| `-column` | set output mode to 'column' |
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| `-cmd COMMAND` | run "COMMAND" before reading stdin |
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| `-csv` | set output mode to '[csv](../../files/CSV.md)' |
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| `-deserialize` | open the database using `sqlite3_deserialize()` |
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| `-echo` | print inputs before execution |
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| `-init FILENAME` | read/process named file |
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| `-[no]header` | turn headers on or off |
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| `-hexkey KEY` | hexadecimal encryption key |
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| `-html` | set output mode to [HTML](../../internet/HTML.md) |
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| `-interactive` | force interactive I/O |
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| `-key KEY` | raw encryption key |
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| `-json` | set output mode to '[json](../../files/JSON.md)' |
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| `-line` | set output mode to 'line' |
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| `-list` | set output mode to 'list' |
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| `-lookaside SIZE N` | use N entries of SZ bytes for lookaside memory |
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| `-markdown` | set output mode to '[markdown](../../files/Markdown.md)' |
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| `-maxsize N` | maximum size for a `--deserialize` database |
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| `-memtrace` | trace all memory allocations and deallocations |
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| `-newline SEP` | set output row separator. Default: `\n` |
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| `-nofollow` | refuse to open symbolic links to database files |
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| `-nonce STRING` | set the safe-mode escape nonce |
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| `-nullvalue TEXT` | set text string for NULL values. Default '' |
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| `-pagecache SIZE N` | use N slots of SZ bytes each for page cache memory |
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| `-quote` | set output mode to 'quote' |
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| `-readonly` | open the database read-only |
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| `-safe` | enable safe-mode |
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| `-separator SEP` | set output column separator. Default: "" |
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| `-stats` | print memory stats before each finalize |
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| `-textkey PASSPHRASE` | text to be hashed into the encryption key |
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| `-table` | set output mode to 'table' |
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| `-tabs` | set output mode to 'tabs' |
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| `-version` | show SQLite version |
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## Commands
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The most important commands inside the SQLite3 Shell:
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- `.backup ?DB? FILE`: Backup DB (default "main") to FILE
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- `.bail on|off`: Stop after hitting an error. Default OFF
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- `.binary on|off`: Turn binary output on or off. Default OFF
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- `.cd DIRECTORY`: Change the working directory to DIRECTORY
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- `.changes on|off`: Show number of rows changed by [SQL](languages/SQL.md)
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- `.check GLOB`: Fail if output since .testcase does not match
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- `.clone NEWDB`: Clone data into NEWDB from the existing database
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- `.databases`: List names and files of attached databases
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- `.dbinfo ?DB?`: Show status information about the database
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- `.dump ?OBJECTS?`: Render database content as [SQL](languages/SQL.md)
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- `.echo on|off`: Turn command echo on or off
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- `.excel`: Display the output of next command in spreadsheet
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- `.exit ?CODE?`: Exit this program with return-code CODE
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- `.headers on|off`: Turn display of headers on or off
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- `.help ?-all? ?PATTERN?`: Show help text for PATTERN
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- `.hex-rekey OLD NEW NEW`: Change the encryption key using hexadecimal
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- `.import FILE TABLE`: Import data from FILE into TABLE
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- `.imposter INDEX TABLE`: Create imposter table TABLE on index INDEX
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- `.indexes ?TABLE?`: Show names of indexes
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- `.limit ?LIMIT? ?VAL?`: Display or change the value of an SQLITE_LIMIT
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- `.lint OPTIONS`: Report potential schema issues.
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- `.log FILE|off`: Turn [logging](../Log.md) on or off. FILE can be stderr/stdout
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- `.nullvalue STRING`: Use STRING in place of NULL values
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- `.once ?OPTIONS? ?FILE?`: Output for the next [SQL](languages/SQL.md) command only to FILE
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- `.open ?OPTIONS? ?FILE?`: Close existing database and reopen FILE
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- `.output ?FILE?`: Send output to FILE or stdout if FILE is omitted
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- `.print STRING...`: Print literal STRING
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- `.quit`: Exit this program
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- `.read FILE`: Read input from FILE or command output
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- `.rekey OLD NEW NEW`: Change the encryption key
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- `.recover`: Recover as much data as possible from corrupt db.
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- `.restore ?DB? FILE`: Restore content of DB (default "main") from FILE
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- `.save ?OPTIONS? FILE`: Write database to FILE (an alias for .backup ...)
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- `.schema ?PATTERN?`: Show the CREATE statements matching PATTERN
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- `.selftest ?OPTIONS?`: Run tests defined in the SELFTEST table
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- `.separator COL ?ROW?`: Change the column and row separators
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- `.sha3sum ...`: Compute a SHA3 hash of database content
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- `.shell CMD ARGS...`: Run CMD ARGS... in a system shell
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- `.system CMD ARGS...`: Run CMD ARGS... in a system shell
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- `.show`: Show the current values for various settings
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- `.stats ?ARG?` : Show stats or turn stats on or off
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- `.tables ?TABLE?` : List names of tables matching LIKE pattern TABLE
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- `.text-rekey OLD NEW NEW`: Change the encryption key using hexadecimal
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- `.width NUM1 NUM2 ...`: Set minimum column widths for columnar output
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