单项选择题

Which of the following DB2 data types has a fixed length?（）

A.XML
B.BLOB
C.DOUBLE
D.DBCLOB

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A.DROP
B.ALTER
C.DELETE
D.ROLLBACK

What type of constraint is used to ensure that each row...

单项选择题What type of constraint is used to ensure that each row inserted into the EMPLOYEE table with a value in the WORKDEPT column has a row with a corresponding value in the DEPTNO column of the DEPARTMENT table?（）

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B.A unique constraint on the EMPLOYEE table WORKDEPT column
C.A foreign key reference from the DEPARTMENT tables DEPTNO column to the WORKDEPT column of the EMPLOYEE table
D.A foreign key reference from the EMPLOYEE tables WORKDEPT column to the DEPTNO column of the DEPARTMENT table

Which of the following constraint types can be used to ...

单项选择题Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?（）

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B.Check
C.Referential
D.Informational

IBM(000-730)

Which of the following DB2 data types has a fixed length?（）