Is there a boolean in SQL?

Does SQL use boolean logic?

SQL Logical OR operator Logical OR compares two Booleans as expression and returns TRUE when either of the conditions is TRUE and returns FALSE when both are FALSE.

What is a Boolean expression in SQL?

SQL Boolean Expressions for the Unwary A Boolean expression is a way of expressing a condition or criterion which can be either true or false. Applying this to database tables we find that we often want to see "all of table x where column 1 is equal to this value, and column 3 is one of these four values".

How do you assign a Boolean value in SQL?

Sql server does not expose a boolean data type which can be used in queries. Instead, it has a bit data type where the possible values are 0 or 1 . So to answer your question, you should use 1 to indicate a true value, 0 to indicate a false value, or null to indicate an unknown value.

Is there boolean in Oracle SQL?

The Oracle RDBMS does not support a Boolean datatype. You can create a table with a column of datatype CHAR(1) and store either “Y” or “N” in that column to indicate TRUE or FALSE. That is a poor substitute, however, for a datatype that stores actual Boolean values (or NULL).