In an equijoin the value in the columns being joined are compared for
1. equality
2. inequality
3. both equality and inequality
4.neither equality nor inequality
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option (1) equality
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Answer:
The answer is option 1: equality.In the case of Equijoins which often review the values in the columns considered to be joined for the sake of equality and then include all the columns of the tables which are being joined to get the ultimate results.
Repeating the same information prove that being useless, columns can be eliminated by restating the query. The result is termed as natural join.
Explanation:
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