Table of Contents

Search

  1. Preface
  2. Introduction to Test Data Management
  3. Test Data Manager
  4. Projects
  5. Policies
  6. Data Discovery
  7. Data Subset
  8. Data Masking
  9. Data Masking Techniques and Parameters
  10. Data Generation
  11. Data Generation Techniques and Parameters
  12. Working with Test Data Warehouse
  13. Analyzing Test Data with Data Coverage
  14. Plans and Workflows
  15. Monitor
  16. Reports
  17. ilmcmd
  18. tdwcmd
  19. tdwquery
  20. Data Type Reference
  21. Data Type Reference for Test Data Warehouse
  22. Data Type Reference for Hadoop
  23. Glossary

Joins

Joins

You can use joins when you run a query with the Select and Select Distinct clauses.
You can use the following types of joins in a query:
Inner Join
Use the following syntax to perform an inner join:
SELECT <columns> FROM <table 1> INNER JOIN <table 2> ON <table 1>.<column_name> = <table 2>.<column_name>
For example:
SELECT suppliers.supplier_id, suppliers.supplier_name, orders.order_date FROM suppliers, INNER JOIN orders ON suppliers.supplier_id = orders.supplier_id
Left Outer Join
Use the following syntax to perform a left outer join:
SELECT <columns> FROM <table 1> LEFT OUTER JOIN <table 2> ON <table 1>.<column_name> = <table 2>.<column_name>
For example:
SELECT suppliers.supplier_id, suppliers.supplier_name, orders.order_date FROM suppliers LEFT OUTER JOIN orders ON suppliers.supplier_id = orders.supplier_id
Right Outer Join
Use the following syntax to perform a right outer join:
SELECT <columns> FROM <table 1> RIGHT OUTER JOIN <table 2> ON <table 1>.<column_name> = <table 2>.<column_name>
For example:
SELECT orders.order_id, orders.order_date, suppliers.supplier_name FROM suppliers RIGHT OUTER JOIN orders ON suppliers.supplier_id = orders.supplier_id
Full Outer Join
Use the following syntax to perform a full outer join:
SELECT <columns> FROM <table 1> FULL OUTER JOIN <table 2> ON <table 1>.<column_name> = <table 2>.<column_name>
For example:
SELECT suppliers.supplier_id, suppliers.supplier_name, orders.order_date FROM suppliers FULL OUTER JOIN orders ON suppliers.supplier_id = orders.supplier_id