Oracle
1Z0-052 · Question #163
1Z0-052 Question #163: Real Exam Question with Answer & Explanation
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Question
You have an ORDERS table with the following structure: Name Null? Type ----------- -------- ------------------ OID NUMBER(6) ODATE DATE CCODE NUMBER(6) OAMT NUMBER(10,2) The table has data in the ODATE column for all rows. Many orders are placed in a single day. You need to ensure that the ODATE column must contain data for every order in future. Which method would serve the purpose?
Options
- AModify the column using the ALTER TABLE ... MODIFY command.
- BAdd a UNIQUE constraint to the column using the ALTER TABLE ... ADD CONSTRAINT command.
- CAdd a NOT NULL constraint to the column using the ALTER TABLE ... ADD CONSTRAINT command.
- DAdd a PRIMARY KEY constraint to the column using the ALTER TABLE ... ADD CONSTRAINT command.
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