Table of Contents

Search

  1. Preface
  2. Introduction to Data Validation Option
  3. Repositories
  4. XML Data Source
  5. Tests for XML Data Sources
  6. Connections
  7. Expressions
  8. Table Pairs
  9. Tests for Table Pairs
  10. Single-Table Constraints
  11. Tests for Single-Table Constraints
  12. Examples of Tests from Spreadsheets
  13. SQL Views
  14. Lookup Views
  15. Join Views
  16. Aggregate Views
  17. Business Intelligence and Reporting Tools Reports
  18. Dashboards
  19. DVOCmd Command Line Program
  20. Troubleshooting
  21. Appendix A: Datatype Reference
  22. Appendix B: Reporting Views
  23. Appendix C: Metadata Import Syntax
  24. Appendix D: Jasper Reports
  25. Appendix E: Glossary

Data Validation Option User Guide

Data Validation Option User Guide

Join Types

Join Types

You can choose join types to link fields in different data sources.
You can create the following types of joins between two tables in a join view:
Inner join
Inner join creates a result table by combining column values in two tables A and B based on the join condition. Data Validation Option compares each row in A with each row in B to find all pairs of rows that satisfy the join condition.
Left outer join
Left outer join between tables A and B contains all records of the left table A, even if the join condition does not find any matching record in the right table B. The resulting join contains all rows from table A and the rows from table B that match the join condition.
Right outer join
Right outer join between tables A and B contains all records of the right table B, even if the join condition does not find any matching record in the left table A. The resulting join contains all rows from table B and the rows from table A.
Full outer join
A full outer join contains all the rows from tables A and B. The resulting join has null values for every column in the tables that does not have a matching row.