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Query this table so that it counts the duplicate entries?

Heather14637354 asked:

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I have a table which looks like this:


1 | PAUL | 30
1 | PAUL | 30
2 | SARA | 40
2 | SARA | 40
3 | ISLA | 50
1 | PAUL | 30

I need to create an SQL query which will count the duplicate entries and give me a result of 3 (2 extra for Paul plus 1 extra for Sara).

What I have tried:

I've been attempting to do this using the UNION instruction, however I'm unclear as to how to create two separate queries to then use this instruction on.
Tags: SQL


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