Which of the following statements about creating constraints is incorrect?
A)If you do not provide a name for a constraint, the Oracle 12c server will issue an error message.
B)There are two approaches for creating constraints: at the column level or the table level.
C)One industry convention is to use the format tablename_columnname_constraint type for the constraint name.
D)none of the above
If you do not provide a name for a constraint, the Oracle 12c server will issue an error message.

Question

24-11-2022
Social Studies

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Which of the following statements about creating constraints is incorrect?
A)If you do not provide a name for a constraint, the Oracle 12c server will issue an error message.
B)There are two approaches for creating constraints: at the column level or the table level.
C)One industry convention is to use the format tablename_columnname_constraint type for the constraint name.
D)none of the above
If you do not provide a name for a constraint, the Oracle 12c server will issue an error message.

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RajarshiG RajarshiG · Answer 1 · 2022-11-29T01:14:42+01:00

The statement about creating constraints which is incorrect is A)If you do not provide a name for a constraint, the Oracle 12c server will issue an error message.

Constraints are accustomed limit the sort of knowledge that may get into a table. This ensures the accuracy and dependableness of the information within the table. If there's any violation between the constraint and also the information action, the action is aborted. Constraints are often column level or table level.

Creating constraints is done by CREATE TABLE, or more to a table later victimization ALTER TABLE: Single-column constraints are often created inline as a part of the column definition. Multi-column constraints should be created in an exceedingly separate, i.e. out-of-line, clause that specifies the columns within the constraint.

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