Final answer:
It's false that column qualifiers must always be included in the WHERE clause for columns with the same name when joining tables. Qualifiers are used to avoid ambiguity but are not always required if the context is clear.
Step-by-step explanation:
The statement that column qualifiers must be included in the WHERE clause if the columns used to join the tables have the same column names is false. Column qualifiers, such as table aliases, are typically used in the SELECT statement to distinguish between columns with the same names in a join query. However, in the WHERE clause, you can also use the same qualifiers to specify which table's column you are referencing. But, the actual requirement to use a qualifier in the WHERE clause depends on whether there is ambiguity between column names. If there is no ambiguity, qualifiers may not be necessary.