Search notes:

SQL data type: boolean

According to the SQL standared (ISO 9075), the boolean data type is an optional feature (with ID T031).
The values that can be assigned to a boolean are

See also

SQL standard features E011 (Numeric types) and E021 (Character string types)
The bit data type in SQL Server
Oracle: boolean data type
Although SQLite does not have a boolean data type, it understands the keywords true and false which evaluate to 1 and 0, respectively.
SQL: data types

Index

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