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bit (Transact-SQL) |
The bit data type is an integer data type that can take a value of 1, 0, or NULL, representing Boolean values. |
MikeRayMSFT |
mikeray |
randolphwest |
09/24/2024 |
sql |
t-sql |
reference |
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>=aps-pdw-2016 || =azuresqldb-current || =azure-sqldw-latest || >=sql-server-2016 || >=sql-server-linux-2017 || =azuresqldb-mi-current || =fabric |
[!INCLUDE sql-asdb-asdbmi-asa-pdw-fabricse-fabricdw-fabricsqldb]
An integer data type that can take a value of 1, 0, or NULL.
The [!INCLUDE ssDEnoversion] optimizes storage of bit columns. If there are 8 or fewer bit columns in a table, the columns are stored as 1 byte. If there are from 9 up to 16 bit columns, the columns are stored as 2 bytes, and so on.
The bit data type can be used to store Boolean values. The string values TRUE and FALSE can be converted to bit values: TRUE is converted to 1, and FALSE is converted to 0.
Converting to bit promotes any nonzero value to 1.
The bit data type supports the COUNT function. However, other standard aggregate functions, like SUM, AVG, MIN, and MAX, don't directly support the bit data type.