Finding nth most recent action with SQL

5 pts.
Tags:
COUNT statement
Database programming
SQL
SQL query optimization
SQL statements
SUM statement
I am trying to determine the date on which a certain number of things have happened cumulatively, eg I have a varying number of buyers each month. I want to find out on what date of that month, those buyers make their 3rd purchase. My SQL doesn't seem to support TOP or ROWCOUNT so I would appreciate alternatives

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In MySql, you could use the LIMIT clause to get something similar to the TOP clause.

LIMIT’s example:

SELECT *
FROM yourTable
LIMIT 10

You could also generate a row number, this way:

select @rownum:=@rownum+1 ‘row_number’, y.*
FROM YourTable y, (SELECT @rownum:=0) r
LIMIT 10;

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