Final answer:
The number of joining conditions required in an SQL statement can vary depending on the relationships between the tables in the database schema.
Step-by-step explanation:
In an SQL statement, the number of joining conditions required depends on the relationship between the tables. To determine the gift that corresponds to each book in the BOOKS table, we need to consider the relationship between the BOOKS table and the table that contains the information about gifts. For example, if each book has a corresponding gift stored in a GIFTS table, then we would need one joining condition to link the BOOKS and GIFTS tables. If there is another table involved, such as AUTHORS, we may need additional joining conditions to establish the relationships between all three tables.
Therefore, the number of joining conditions required in an SQL statement to determine the gift that corresponds to each book in the BOOKS table can vary. It could be one, two, three, or even four, depending on the complexity of the database schema.