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How to Write a SELECT SQL Query for Oracle 19c Groups?

  • This article discusses how to write a SELECT SQL query in Oracle 19c to identify the latest account numbers from specific groups based on previous account numbers.
  • The dataset comprises Account Number and Previous Number columns, allowing for the determination of the latest account number in each group.
  • The query utilizes Common Table Expressions (CTEs) and functions like REGEXP_SUBSTR and ROW_NUMBER to isolate the latest account numbers for distinct groups.
  • By leveraging SQL techniques and structured querying, users can efficiently extract the most recent records from hierarchical data structures in Oracle 19c.

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