Uses of Merge Join
- Sorted Data: Merge join is great used while the tables are already sorted at the join key or can be easily looked after.
- Large Datasets: It is in particular applicable for large datasets where different kinds of joins (like nested loop joins or hash joins) is probably less efficient or viable.
- Equi-joins: It is generally used for equi-joins, in which the be part of situation is primarily based on equality.
Merge Join in DBMS
Merge be part of is a hard and fast-based be part of operation used in database control systems (DBMS) to mix rows from or extra tables based on an associated column among them. It is mainly efficient whilst the tables involved are large and while they are each sorted on the be a part of the key, which is the column or set of columns used for the join. Here’s an outline of the way merge is a part of works, its benefits, and when it is best used.