Table of Contents

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  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. Datatype Reference
  22. Reporting Views
  23. Metadata Import Syntax
  24. Jasper Reports
  25. Glossary

Data Validation Option User Guide

Data Validation Option User Guide

Rules and Guidelines for Joins

Rules and Guidelines for Joins

Certain rules and guidelines apply when you create a join in a join view.
Use the following rules and guidelines when you create a join:
  • The fields included in a join condition must have compatible datatypes, precisions, and scales. For example, you can join an INT field to a DECIMAL field, but not to a DATETIME or VARCHAR field.
  • Data Validation Option supports joins on fields with the following datatypes: datetime, numeric, and string. Joins are not allowed on binary/other datatypes.
  • For an XML data source, only child elements of the selected XML group appear as possible join fields.
  • You can create multiple join conditions.
  • If you specify a file list connection and the fields in the join condition are not unique among all files in the file list, the join fails.