Final answer:
The statement that the inner join of n tables will have n-1 joining conditions specifying which rows to consider from the cross-product is true.
Step-by-step explanation:
An inner join is a type of join that combines rows from two or more tables based on a related column between them. To create a meaningful dataset, the joining conditions are applied so that only the matching rows from the tables being joined are included in the result set.
When joining multiple tables, each additional table requires a joining condition to the accumulating result set. Therefore, for n tables to be joined using inner joins, typically n-1 conditions should be specified to define how each table relates to the others.
For example, if we have three tables A, B, and C, we require at least two joining conditions: one to join A to B, and another one to join this result to C. This prevents the generation of a Cartesian product, which would result in an excessively large number of rows that consist of all possible combinations of rows across all tables and usually doesn't provide useful information