| title | description | author | ms.author | ms.date | ms.service | ms.subservice | ms.topic | ms.custom | f1_keywords | helpviewer_keywords | dev_langs | monikerRange | ||||
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IsNull (geography Data Type) |
IsNull (geography Data Type) |
MladjoA |
mlandzic |
03/14/2017 |
sql |
t-sql |
reference |
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=azuresqldb-current || >=sql-server-2016 || >=sql-server-linux-2017 || =azuresqldb-mi-current || =fabric |
[!INCLUDE SQL Server Azure SQL Database Azure SQL Managed Instance FabricSQLDB]
A property that specifies if the geography instance is null. Returns 'TRUE' if the instance is null; returns 0 if the instance is not null.
.IsNull
[!INCLUDEssNoVersion] type: bit
CLR type: SqlBoolean
IsNull can be used to test whether a geography instance is null. This can produce somewhat confusing results, returning 0 if the instance is not null, but null if the instance is null.
This method is primarily used by the [!INCLUDEssNoVersion] infrastructure; it is recommended that you use the T-SQL predicate IS NULL to test whether a geography instance is null. For more information on the T-SQL predicate IS NULL, see IS NULL (Transact-SQL).