Final answer:
Nonequijoins are usually used with ranges of numbers or dates and are employed to join tables based on a range of values rather than a precise key match. These joins are helpful in complex data analysis when exact matches are not possible or necessary.
Step-by-step explanation:
Nonequijoins are normally used with ranges of numbers, ranges of dates, or to relate rows that do not have a precise match but are within a certain range of each other. They are particularly useful in scenarios such as when joining two tables based on a range of values rather than a specific key match. For example, a nonequijoin can be used to join a table that contains salary ranges with another table that contains employee salaries to determine the category of pay for each employee. This allows for more complex queries and data analysis when exact matches are not possible or required.
Nonequijoins offer flexibility in SQL queries and are often employed in complex data scenarios where precise key matches are not the basis for joining tables. The use of nonequijoins is an advanced SQL technique often encountered in business or data analysis applications within relational database management systems.