Statement 1: A tuple is a row in a relation Statement 2: Existence of multiple foreign keys in a same relation is possible

Related MCQs

• Statement 1: A tuple is a row in a relation Statement 2: Existence of multiple foreign keys in a same relation is possible
• A                    integrity constraint requires that the values appearing in specified attributes of any tuple in the referencing relation also appear in specified attributes of at least one tuple in the referenced relation.
• A _________ integrity constraint requires that the values appearing in specified attributes of any tuple in the referencing relation also appear in specified attributes of at least one tuple in the referenced relation.
• A _________ integrity constraint requires that the values appearing in specified attributes of any tuple in the referencing relation also appear in specified attributes of at least one tuple in the referenced relation.
• A                  is a pictorial depiction of the schema of a database that shows the relations in the database, their attributes, and primary keys and foreign keys.
• Given the relation Supplier(s_id, p_order, s_name, qty) Given that there is a unique s_name for each s_id and that s_id, p_order is a composite key, find the correct statement among the following: i. this relation is a BCNF ii. this is 3 NF relation iii. this is a 2 NF relation iv. this is a 1 NF relation
• The          lock allows concurrent transactions to access the same row as long as they require the use of different fields within that row.
• The ____ lock allows concurrent transactions to access the same row as long as they require the use of different fields within that row.
• State true or false: If a relation consists of a foreign key, then it is called a referenced relation of the foreign key dependency.
• An attribute in a relation is a foreign key if the                key from one relation is used as an attribute in that relation.