![]() ![]() SQL level and can only be detected by examining the raw bits of the This optimization is completely invisible at the Space and are automatically converted back into floating point as the Values with no fractional component and stored in columns with REALĪffinity are written to disk as integers in order to take up less (As an internal optimization, small floating point Another reason why SQLite is the world's most popular RDBMS!Ī column with REAL affinity behaves like a column with NUMERICĪffinity except that it forces integer values into floating point So, a very good reason for this genericity is backwards compatibility with virtually all engines on the market - and it the default doesn't suit you, you are free to change the code (Public Domain licence). The type affinity of a column is the recommended On other SQL database engines, SQLite supports the concept of "typeĪffinity" on columns. In order to maximize compatibility between SQLite and other databaseĮngines, and so that the example above will work on SQLite as it does "datatype" and the two terms can be used interchangeably. Statically typed databases should work the same way in SQLite.Īnd so for the most part, "storage class" is indistinguishable from ![]() The dynamic type system of SQLite isīackwards compatible with the more common static type systems of otherĭatabase engines in the sense that SQL statements that work on In SQLite, the datatype of a value is associated with the value like the C programming language, SQLite allows you to do very stupid things because it also allows you to do very clever things - compare C with Java and SQLite with other RDBMSs for example.Ī storage class is more general than a datatype. Not possible in traditional rigidly typed databases. However, the dynamic typing in SQLite allows it to do things which are In particular, the following sections of that page are interesting. If you read this page, it provides an insight into both the function of and reasoning behind SQLite datatypes. There are several rationales in SQLite for defining datatypes, or as SQLite calls them, "storage classes".
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