I have a table with thousands of records and many records per customer number. Each record also contains dates.
I need to find the two most recent records for each customer. How should I go about that using a select in oracle sql?
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If you have heard of RFC822 date formats, they can be quite a challenge in SQL Server. RFC822 is an Internet standard format for email message headers, including all dates within those headers. The RFC822 protocols are available in detail at:
Composite queries are used to retrieve the results from joining multiple queries after applying any filters. UNION, INTERSECT, MINUS, and UNION ALL are some of the operators used to get certain desired results.