1. INNER JOIN INNER SPRIDEN SARADAP
A join is a temporary connection between two or more data sources that share at least one common field. Once you join two data sources, each time WebFOCUS retrieves a record from the first data source (host file), it also retrieves the matching records from the second data source (target file).
Inner Join. A join that results when a report omits host rows that lack corresponding cross-referenced rows.

2. LEFT OUTER JOIN LEFT OUTER SARADAP SPRIDEN
Left Outer Join. Extends the results of an Inner Join and retrieves records from both host and cross-referenced tables, including all records from the left table (host) and any records from the right table (cross-referenced) where the condition values match. If there are no matching values in the cross-referenced table, the join still retrieves records from the host table.