![]() ![]() Alternatively, you can save changes manually with a commit command. ![]() When the database is closed, the data is inserted into the database. Write Ahead Log (WAL): With a Write Ahead Log, all changes are saved in a log file.If there are problems with the database or individual files, a rollback can be carried out and an earlier status is restored. Rollback Journal: This method automatically creates a temporary journal of all changes and stores it under the name of the respective database with the extension “-journal”.There are two ways to ensure the consistency of a database in SQLite. This means all common data types can be stored in SQLite. NULL: This allows for null values to be mapped in SQLite. ![]() BLOB: This term stands for binary large object and refers to data in a binary value format, such as thumbnails or configuration files in XML.TEXT: This data type contains all plain text content.REAL: This includes approximated representations of a real number as a floating point.INTEGER: This encompasses all integer values.The possible data types that can be saved and stored are: This also means that conversion isn’t necessarily required for further processing across systems. With SQLite, data can be stored in different formats. Which data types are possible with SQLite? ¶ These attributes have also contributed to the global success of the database system. ![]() These references provide a much leaner structure and make it easier to work with SQLite compared to other databases. Foreign key: This is used to link multiple tables together.Primary key: This is a unique value that can be assigned to a specific row in the table.A primary key and a foreign key are used for this purpose. These are converted only if necessary, so that changing between systems with a different byte order is possible.Īs a relational database management system, it uses a two-key principle to identify entries in a table and to link different tables. This means that using a file in different systems is simple, in part because data can be stored within a table. Optionally, the file can also be stored in the main memory. All tables, references and links are accommodated in a single, space-saving file. The app then automatically receives comprehensive database functions. It can be easily integrated into an application without the use of additional server software. There’s no steep learning curve with SQLite. There’s also no need to install or configure the open-source database system. With SQLite3 Python, the popular programming language now has an integration module for SQLite. Integration with other programs is simple and can be done via the C interface or an interface such as Ruby, PHP or Python. The respective data is stored in tables in the program library and can be retrieved column by column. It’s also used in the instant messaging app Skype. SQLite is written in the web programming language C and is used in numerous operating systems and programs, including Android, iOS and Windows Phone as well as Google Chrome, Mozilla Firefox and Safari SQLite. Additionally, the lightweight system has a small size of only a few hundred kilobytes and stores an entire database in one file. Its name alludes to the fact that, unlike other common databases, the relational database SQLite doesn’t require additional server software. The name “SQLite” is comprised of “SQL”, which is short for “Structured Query Language”, and “lite”, a colloquial term used here to indicate that the database is a lighter and less memory-intensive version. Richard Hipp in 2000 for the US Army, the software is now available in the public domain and thus copyright-free. SQLite is the most widely used database system in the world. What alternatives to the database library are there?.Which data types are possible with SQLite?. ![]()
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