单项选择题
A UDT is a data type which:（）
A.must contain unique values.
B.cannot be CAST to other data types.
C.is created using the CREATE DISTINCT command.
D.contains a value that was automatically calculated from values in other columns.
点击查看答案
相关考题
-
单项选择题
A UDT is a data type which:（）
A.must contain unique values.
B.cannot be CAST to other data types.
C.is created using the CREATE DISTINCT command.
D.contains a value that was automatically calculated from values in other columns. -
单项选择题
Which of the following DB2 data types has a fixed length?（）
A.XML
B.BLOB
C.DOUBLE
D.DBCLOB -
单项选择题
Which of the following actions may cause a trigger to be fired?（）
A.DROP
B.ALTER
C.DELETE
D.ROLLBACK
