SQLite overview
SQLite is an in-process library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine.
The code for SQLite is in the public domain and is thus free for use for any purpose, commercial or private. SQLite is currently found in more applications than we can count, including several high-profile projects. SQLite is an embedded SQL database engine. Unlike most other SQL databases, SQLite does not have a separate server process. SQLite reads and writes directly to ordinary disk files. A complete SQL 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. Think of SQLite not as a replacement for Oracle but as a replacement for fopen() If you need a GUI for database management, you can install NAVICAT. SQLite is a compact library. With all features enabled, the library size can be less than 300KiB, depending on compiler optimization settings. (Some compiler optimizations such as aggressive function inlining and loop unrolling can cause the object code to be much larger.) If optional features are omitted, the size of the SQLite library can be reduced below 180KiB.
SQLite can also be made to run in minimal stack space (4KiB) and very little heap (100KiB), making SQLite a popular database engine choice on memory constrained gadgets such as cellphones, PDAs, and MP3 players. There is a tradeoff between memory usage and speed. SQLite generally runs faster the more memory you give it. Nevertheless, performance is usually quite good even in low-memory environments.
What’s new in version 3.42.0
Updated on May 18 2023
- Add the FTS5 secure-delete command. This option causes all forensic traces to be removed from the FTS5 inverted index when content is deleted.
- Enhance the JSON SQL functions to support JSON5 extensions.
- The SQLITE_CONFIG_LOG and SQLITE_CONFIG_PCACHE_HDRSZ calls to sqlite3_config() are now allowed to occur after sqlite3_initialize().
- New sqlite3_db_config() options: SQLITE_DBCONFIG_STMT_SCANSTATUS and SQLITE_DBCONFIG_REVERSE_SCANORDER.
- Query planner improvements:
- Enable the "count-of-view" optimization by default.
- Avoid computing unused columns in subqueries.
- Improvements to the push-down optimization.
- Enhancements to the CLI:
- Add the --unsafe-testing command-line option. Without this option, some dot-commands (ex: ".testctrl") are now disabled because those commands that are intended for testing only and can cause malfunctions misused.
- Allow commands ".log on" and ".log off", even in --safe mode.
- "--" as a command-line argument means all subsequent arguments that start with "-" are interpreted as normal non-option argument.
- Magic parameters ":inf" and ":nan" bind to floating point literals Infinity and NaN, respectively.
- The --utf8 command-line option omits all translation to or from MBCS on the Windows console for interactive sessions, and sets the console code page for UTF-8 I/O during such sessions. The --utf8 option is a no-op on all other platforms.
- Add the ability for application-defined SQL functions to have the same name as join keywords: CROSS, FULL, INNER, LEFT, NATURAL, OUTER, or RIGHT.
- Enhancements to PRAGMA integrity_check:
- Detect and raise an error when a NaN value is stored in a NOT NULL column.
- Improved error message output identifies the root page of a b-tree when an error is found within a b-tree.
- Allow the session extension to be configured to capture changes from tables that lack an explicit ROWID.
- Added the subsecond modifier to the date and time functions.
- Negative values passed into sqlite3_sleep() are henceforth interpreted as 0.
- The maximum recursion depth for JSON arrays and objects is lowered from 2000 to 1000.
- Extended the built-in printf() function so the comma option now works with floating-point conversions in addition to integer conversions.
Information
App requirements
- Intel 64
- Intel 32
- Mac OS X 10.4 or later
(0 Reviews of )
Comments
User Ratings
"Cybersecurity researchers have discovered a critical vulnerability in widely used SQLite database software that exposes billions of deployments to hackers.
Dubbed as 'Magellan' by Tencent's Blade security team, the newly discovered SQLite flaw could allow remote attackers to execute arbitrary or malicious code on affected devices, leak program memory or crash applications...."
https://thehackernews.com/2018/12/sqlite-vulnerability.html