Not on Mac? Download TablePlus for Windows. TablePlus is a modern, native client with intuitive GUI tools to create, access, query & edit multiple databases: MySQL, PostgreSQL, SQLite, Microsoft SQL Server, Amazon Redshift, MariaDB, CockroachDB, Vertica, Cassandra, Oracle, and Redis. Looking for a good GUI tool to work with SQLite database? Try TablePlus. If you try to specify the size, it will automatically be ignored by SQLite.This column may contain values using all five storage classes.īehaves like a column with NUMERIC affinity except that it forces integer values into floating point representation.Ī 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. This column stores all data using storage classes NULL, TEXT or BLOB.īehaves the same as a column with NUMERIC affinity, with an exception in a CAST expression. You can use the SQL syntax from other relational databases such as CHAR(size) and SQLite accepts them and converts to match with its data types (TEXT).Įach table column in an SQLite 3 database is assigned one of the following type affinities: Name
You can still store any type of data you like in any column because like I mentioned earlier, SQLite stores a value depending on its associated type, not the type of the column. It’s recommended for the column but not required. In SQLite, each column has a preferred storage class called its affinity type. Instead, Boolean values are stored as integers 0 (false) and 1 (true). Note: SQLite does not have a separate Boolean storage class. Value is SQLite will be stored with one of these storage classes: NameĪ text string, stored using the database encoding (UTF-8, UTF-16BE or UTF-16LE).Ī signed integer, stored in 1, 2, 3, 4, 6, or 8 bytes depending on the magnitude of the value.Ī floating point value, stored as an 8-byte IEEE floating point number.Ī blob of data, stored exactly as it was input. It uses the storage class with multiple different data types of different lengths. The definition of the data type in SQLite is slightly more generic than in other relational database management systems. And then SQLite stores that value depending on its type. The data type of a value is associated with the value itself, not with its container. In SQLite, it’s quite flexible to store data with the dynamic type system. There are two definitions related to data types we need to know in SQLite 3:
0 kommentar(er)
