Oracle
1Z0-007 · Question #102
Which two statements are true about constraints? (Choose two.)
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Creating and Managing Schema Objects
Question
Which two statements are true about constraints? (Choose two.)
Options
- AThe UNIQUE constraint does not permit a null value for the column.
- BA UNIQUE index gets created for columns with PRIMARY KEY and UNIQUE constraints.
- CThe PRIMARY KEY and FOREIGN KEY constraints create a UNIQUE index.
- DThe NOT NULL constraint ensures that null values are not permitted for the column.
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Topics
#UNIQUE constraint#PRIMARY KEY#NOT NULL#indexes