Sqlite boolean expression mac os#

Instead, Boolean values are stored as integers 0 (false) and 1 the flip side, SQLite supports datetimes, despite not being one of those five types, so this answer is inconclusive' SQLite does not have a separate Boolean storage class.

NONE A column with affinity NONE does not prefer one storage class over another and no attempt is made toĬoerce data from one storage class into another.

REAL Behaves like a column with NUMERIC affinity except that it forces integer values into floating point representation.

INTEGER Behaves the same as a column with NUMERIC affinity.

NUMERIC This column may contain values using all five storage.

boolean autoConnect optional true: Whether or not the datasource should automatically connect.

TEXT This column stores all data using storage classes NULL, TEXT or The SQLite CASE expression evaluates a list of conditions and returns an expression based on the result of the evaluation. Array of configuration information for the Datasource.

Each table column in an SQLite3 database is assigned one of the following type affinities: 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.

Sqlite boolean expression mac os#

This chapter will take you through the process of setting up SQLite on Windows, Linux and Mac OS X.

TEXT that looks like a number (eg '0', '1', '5'): Behaves like NUMERIC, listed above. DQL - Data Query Language SQLite - Installation SQLite is famous for its great feature zero-configuration, which means no complex setup or administration is needed.

Even values like 't', 'TRUE', 'true', 'True' still match IS FALSE

Any TEXT that does not parse to a numeric value: IS FALSE.

Any zero NUMERIC, INTEGER, or REAL: IS FALSE.

There are others clauses too, with their own SQL keywords. Any non-zero NUMERIC, INTEGER, or REAL: IS TRUE You can try that out in DB Browser for SQLite: WHERE and FROM are 'clauses' These additional keywords with some sections like WHERE and FROM that go after SELECT (or others) have a technical name, they are called clauses.SELECT * FROM blah WHERE some_column IS TRUE Īnd it will work how you expect if you are using 0 for false and 1 for true.įrom my testing, here is how SQLite matches various values: SELECT * FROM blah WHERE some_column IS FALSE SQLite does not implement a native BOOLEAN type, but accepts BOOLEAN in the SQL syntax for data column types, and uses integer values 1 / 0 for true/false.

Most of the expressions listed in the table General expressions can result in boolean values. However, this is completely independent of whether SQLite supports boolean literals and comprehensions.įor anyone wondering, the answer is YES, since SQLite 3.23 you can do boolean comprehensions with the boolean literals TRUE and FALSE, and it will work how you expect. Boolean expressions are expressions that result in boolean values. As everyone else has pointed out, SQLite does not support a specific boolean storage type, and the OP specifically acknowledges this fact.