values result in an error. • If a SKIP lands past the end of the dataset, an empty set is returned. • If the number of rows in the dataset (or the remainder left after a SKIP) is less than the value of a join condition in order to determine which rows should be merged and appear in the resulting dataset. There are several types (INNER, OUTER) and classes (qualified, natural, etc.) of joins, each with Firebird rejects unqualified field names in a query if these field names exist in more than one dataset involved in a join. This is even true for inner equi-joins where the field name figures in the Chapter

values result in an error. • If a SKIP lands past the end of the dataset, an empty set is returned. • If the number of rows in the dataset (or the remainder left after a SKIP) is less than the value of a join condition in order to determine which rows should be merged and appear in the resulting dataset. There are several types (INNER, OUTER) and classes (qualified, natural, etc.) of joins, each with Firebird rejects unqualified field names in a query if these field names exist in more than one dataset involved in a join. This is even true for inner equi-joins where the field name figures in the ON

returns true. As a result, the query select A from TA where A not in ( select B from TB ) returns a dataset with one record — containing the field with value 3 — while it should have returned an empty set data from the table. With isql and many other clients, “SELECT * FROM ADVENTURES” will return this dataset: Table 9. Result set after adding a NOT NULL column Name Bought Price ID Maniac Mansion 12-Jun-1995

Überprüfung einer Join-Bedingung, um zu bestimmen, welche Zeilen zusammengeführt und im resultierenden Dataset erscheinen sollen. Es gibt verschiedene Typen (INNER, OUTER) und Klassen (qualifiziert, natürlich Feldnamen in einer Abfrage zurück, wenn diese Feldnamen in mehr als einem an einem Join beteiligten Dataset vorhanden sind. Dies gilt sogar für innere Equi- Joins, bei denen der Feldname in der ON-Klausel sowie N Positionen relativ zur aktuellen Position.  Scrollbare Cursor werden als temporäres Dataset materialisiert und verbrauchen daher zusätzlichen Speicher oder Festplattenspeicher. Verwenden Sie