sql_variant type column : SQL_VARIANT « Data Types « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Data Types » SQL_VARIANT 
5. 22. 4. sql_variant type column
26> CREATE TABLE variant2
27> (a sql_variant, b sql_variant )
28> GO
1> INSERT INTO variant2
2>     VALUES (CAST (111 as int), CAST(222 as money ))
3> GO

(1 rows affected)
1> INSERT INTO variant2
2>     VALUES (CAST (333 as int), CAST(444 as char(3) ))
3> GO

(1 rows affected)
1>
2> SELECT *
3> FROM variant2
4> WHERE a > b
5>
6> GO
a







































 b








































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-
333







































 444









































(1 rows affected)
1>
2> SELECT *
3> FROM variant2
4> WHERE a < b
5> GO
a







































 b








































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-
111







































 222









































(1 rows affected)
1>
2> drop table variant2;
3> GO
1>
5. 22. SQL_VARIANT
5. 22. 1. sql_variant data type is designed to allow a single variable, column, or parameter to store values in different data types.
5. 22. 2. The creation of the table, with a column of the SQL_VARIANT type.
5. 22. 3. Insert different type of values into a sql_variant column
5. 22. 4. sql_variant type column
5. 22. 5. Select case and cast SQL_VARIANT
5. 22. 6. Comparing SQL_VARIANTs
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