Question

In which of the following scenarios can we use 'Wide rows'?

a) ordering
b) grouping
c) efficient filtering
d) all

Answer 1

Wide rows can be used in scenarios like ordering, grouping, and efficient filtering in database systems, as they allow for efficient read operations, simplification of data grouping, and fast query execution without joins.

Step-by-step explanation:

In the context of database design and querying, wide rows refer to a data modeling pattern where a single logical row of data is spread across multiple physical columns. This approach can be particularly advantageous in certain scenarios given its adaptability and performance benefits.

• Ordering: Wide rows can be effective when there is a need to maintain large amounts of sorted data, as they allow for efficient read operations by storing related data contiguously in storage.
• Grouping: Using wide rows can simplify the grouping of related columns, making retrieval of related data faster since all the required information is in the same row.
• Efficient Filtering: When multiple columns are used within a wide row, it allows for the efficient execution of queries, which filter data based on these columns, without the need for joining separate tables.

Therefore, the answer is d) all of the mentioned scenarios: ordering, grouping, and efficient filtering can benefit from the use of wide rows in database systems.