Abfrage auf null oracle
If all parameters contain null values, it returns null. It accepts two parameters and returns null if both parameters are equal. If they are not equal, the first parameter value is returned. In our test table the values of COL3 and COL4 are equal in row 4, so we would only expect null returned for that row using the following query. It is used in a where clause to evaluate a condition. If this condition evaluates to false or unknown, it returns true.
If the condition evaluates to true, it returns false. Fortnightly newsletters help sharpen your skills and keep you ahead, with articles, ebooks and opinion to keep you informed.
View all articles by Patrick Barel. FROM emp t. WHERE t. NVL expr1 , expr2. NVL2 expr1 , expr2 , expr3. LNNVL condition. FROM emp e. AND e. FROM table ;. ELSE 'Unknown'. END color. Redgate Deploy is the solution to automate database deployments so that software can be delivered more frequently and reliably.
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Rate this article. Patrick Barel View all articles by Patrick Barel. Bestimmt die Anzahl von Elementen mit einem Wert ungleich Null.
First Sales. Last Sales. Max Revenue. Median Sales. Min Revenue. Sum Revenue. IfNull Sales, 0. BottomN Sales, Berechnet den Ausdruck mit dem angegebenen Pre-Aggregationsfilter. Mavg Sales, Ntile Sales, Percentile Sales. Rank Sales. TopN Sales, Abs Profit. Berechnet den absoluten Wert eines numerischen Ausdrucks.
Acos 1. Berechnet den Arcuskosinus eines numerischen Ausdrucks. Asin 1. Berechnet den Arcussinus eines numerischen Ausdrucks. Atan 1. Berechnet den Arcustangens eines numerischen Ausdrucks.
Atan2 1, 2. Ceiling Profit. Cos 1. Berechnet den Kosinus eines numerischen Ausdrucks. Cot 1. Berechnet den Cotangens eines numerischen Ausdrucks. Degrees 1. Konvertiert einen Ausdruck von Radiant in Grad. Exp 4. Int ExtractBit 1, 5.
Floor Profit. Log 1. Log10 1. Berechnet den Logarithmus zur Basis 10 eines Ausdrucks.
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