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| äußere Verknüpfung | |||
| äußere Verknüpfung (A join that includes all the rows from the joined tables that meet the search conditions, even rows from one table for which there is no matching row in the other join table) | |||
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outer join : 5 a las frases, 2 temas |
| Microelectrónica | 1 |
| Microsoft | 4 |