SQL FULL OUTER JOIN Keyword. The FULL OUTER JOIN keyword returns all records when there is a match in left (table1) or right (table2) table records. Note: FULL OUTER JOIN can potentially return very large result-sets! Die jeweiligen Operationen heißen dementsprechend LEFT OUTER JOIN und RIGHT OUTER JOIN.
Möchten Sie im Rahmen von Datenbankabfragen zusätzlich zu den Datensätzen, die die Selektionsbedingung erfüllen, auch sämtliche Datensätze der linken und rechten Tabelle ausgeben, handelt es sich um einen FULL OUTER JOIN. A full outer join would give us all records from both tables, whether or not they have a match in the other table, with NULLs on both sides where there is no match. FULL JOIN can potentially return very large datasets. Multiple FULL OUTER JOIN on multiple tables. For each row in the Ttable, the full outer join compares it with every row in the Ttable.
If rows from both tables meet the join _condition, the full outer join includes columns of both rows in the result set. We say that the row in Ttable matches with the row in the Ttable in this case. In theory, a full outer join is the combination of a left join and a right join. The full outer join includes all rows from the joined tables whether or not the other table has the. Sie neue Stellen in der Datenbankentwicklung und Administration!