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How to write literal boolean value in SQL Server? See sample use:
select * from SomeTable where PSEUDO_TRUE another sample:
if PSEUDO_TRUE begin select 'Hello, SQL!' end Note: The query above has nothing to do with how I'm going to use it. It is just to test the literal boolean.
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There is no boolean data type in SQL Server. However, a common option is to use the BIT data type. A BIT data type is used to store bit values from 1 to 64. So, a BIT field can be used for booleans, providing 1 for TRUE and 0 for FALSE.
A Boolean literal is a character-string delimited on the left by the separator B" and on the right by the quotation mark separator. The character-string consists only of the character 0 or 1. The value of a Boolean literal is the character itself, excluding the delimiting separators.
SQL - Boolean Data A Boolean table column will contain either string values of "True" and "False" or the numeric equivalent representation, with 0 being false and 1 being true.
In SQL Server, a literal is the same as a constant. We'll cover several types of literals - string, integer, decimal, and datetime literals.
SQL Server doesn't have a boolean data type. As @Mikael has indicated, the closest approximation is the bit. But that is a numeric type, not a boolean type. In addition, it only supports 2 values - 0 or 1 (and one non-value, NULL).
SQL (standard SQL, as well as T-SQL dialect) describes a Three valued logic. The boolean type for SQL should support 3 values - TRUE, FALSE and UNKNOWN (and also, the non-value NULL). So bit isn't actually a good match here.
Given that SQL Server has no support for the data type, we should not expect to be able to write literals of that "type".
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