​Structure of the ORDERITEMS Table

question 11

Multiple Choice

​Structure of the ORDERITEMS table

-If a PRIMARY KEY constraint,named ORDERITEMS_PK,for the ORDER# and ITEM# columns of the ORDERITEMS table have been disabled,which of the following commands will enable the constraint?​

• A) ALTER TABLE orderitems ENABLE PRIMARY KEY CONSTRAINT;
• B) ALTER TABLE orderitems ENABLE CONSTRAINT orderitems_pk;
• C) ALTER TABLE orderitems MODIFY PRIMARY KEY CONSTRAINT;
• D) ​ALTER TABLE orderitems MODIFY PRIMARY KEY CONSTRAINT ENABLE;

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Definitions:

Protein-Digesting Enzyme

An enzyme, also known as a protease, that breaks down proteins into smaller peptides or amino acids, crucial for many biological processes including digestion.

Stomach Juice

A mix of hydrochloric acid, enzymes, and mucus produced in the stomach, crucial for the digestion of food and killing pathogens.

Oxidoreductases

Enzymes that catalyze the transfer of electrons from one molecule (the reductant) to another (the oxidant), crucial in both energy production and detoxification.

Oxidation-Reduction Reactions

Chemical reactions involving the transfer of electrons between two substances, affecting the oxidation state of the reactants.