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Consider a scenario, there are three tables name ‘X’, ‘Y ‘and’ Z’ with schemes X (u, v, w), Y (l, u, m, n, o, p) and Z (r, s, t, u, q), These tables have a common attribute or field. We want to retrieve the data from these tables.

In this scenario, discuss which join operation can help to retrieve the records from multiple tables. Justify your answer with at least two solid arguments.

Respuesta :

MrRoyal

Tables are used to represent data elements in a database, where each table is uniquely created.

The best join operation to use is the INNER JOIN

How to determine the join operation

The tables and their contents are given as

  • Table X (u, v, w)
  • Table Y (l, u, m, n, o, p)
  • Table Z (r, s, t, u, q),

In the above tables, the common attribute or field is the field u

The best join operation to use in this case is the INNER JOIN

This is so, because it retrieves the matching records in all the tables

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