The value is a blob of data, stored exactly asĪ storage class is more general than a datatype. The value is a text string, stored using theĭatabase encoding (UTF-8, UTF-16BE or UTF-16LE).īLOB. The value is a floating point value, stored as The value is a signed integer, stored in 0, 1,Ģ, 3, 4, 6, or 8 bytes depending on the magnitude of the value. That do rigid type enforcement, for developers who prefer that kind of thing.Įach value stored in an SQLite database (or manipulated by theĭatabase engine) has one of the following storage classes: Flexible typing is a feature of SQLite, not a bug.Īs of version 3.37.0 (), SQLite provides STRICT tables It to do things which are not possible in traditional rigidly typedĭatabases. However, the dynamic typing in SQLite allows In the sense that SQL statements that work on statically typed databases The dynamic type system of SQLite is backwardsĬompatible with the more common static type systems of other database engines Of a value is associated with the value itself, not with its container. SQLite uses a more general dynamic type system. Of a value is determined by its container - the particular column in Most SQL database engines (every SQL database engine other than SQLite,Īs far as we know) uses static, rigid typing. You can choose to store dates and times in any of these formats and freely convert between formats using the built-in date and time functions.7.2. INTEGERThe number of seconds since 00:00:00 UTC REALThe number of days since noon in Greenwich on NovemB.C. TEXTA date in a format like “YYYY-MM-DD HH:MM:SS.SSS” SQLite does not have a separate storage class for storing dates and/or times, but SQLite is capable of storing dates and times as TEXT, REAL or INTEGER values. Instead, Boolean values are stored as integers 0 (false) and 1 (true). SQLite does not have a separate Boolean storage class. INTINTEGERTINYINTSMALLINTMEDIUMINTBIGINTUNSIGNED BIG INTINT2INT8ĬHARACTER(20)VARCHAR(255)VARYING CHARACTER(255)NCHAR(55)NATIVE CHARACTER(70)NVARCHAR(100)TEXTCLOB NONEA column with affinity NONE does not prefer one storage class over another and no attempt is made to coerce data from one storage class into another.įollowing table lists down various data type names which can be used while creating SQLite3 tables with the corresponding applied affinity. REALBehaves like a column with NUMERIC affinity except that it forces integer values into floating point representation. INTEGERBehaves the same as a column with NUMERIC affinity, with an exception in a CAST expression. NUMERICThis column may contain values using all five storage classes. TEXTThis column stores all data using storage classes NULL, TEXT or BLOB. Each table column in an SQLite3 database is assigned one of the following type affinities − Sr.No. Any column can still store any type of data but the preferred storage class for a column is called its affinity. SQLite supports the concept of type affinity on columns. The INTEGER storage class, for example, includes 6 different integer datatypes of different lengths. SQLite storage class is slightly more general than a datatype. TEXTThe value is a text string, stored using the database encoding (UTF-8, UTF-16BE or UTF-16LE)īLOBThe value is a blob of data, stored exactly as it was input. REALThe value is a floating point value, stored as an 8-byte IEEE floating point number. INTEGERThe value is a signed integer, stored in 1, 2, 3, 4, 6, or 8 bytes depending on the magnitude of the value. SQLite Storage ClassesĮach value stored in an SQLite database has one of the following storage classes − Sr.No. In SQLite, the datatype of a value is associated with the value itself, not with its container. You would use these data types while creating your tables. Each column, variable and expression has related data type in SQLite. SQLite data type is an attribute that specifies the type of data of any object.
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