Question

uestion No. 30
Why we need to create an index if primary key is already present in a table?
Indexes are special lookup tables that the database search engine can use
All of the above
Indexes are synonyms of a column in a table
Index improves the speed of data retrieval operations on a database table​

Answer 1

Answer:

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Answer 2

Answer:

all of the above

Explanation:

Index improves the speed of data retrieval operations on a database table