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Checks whether the variable has a NULL value.
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Syntax:
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ISNULL(variable)
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Parameters:
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variable: A variable as defined in the view record. This function expects an actual variable and not a variable literal.
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Returns:
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True if the variable contains a NULL value or False if the variable does not contain a NULL value.
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Example:
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ISNULL(BE) returns True if the variable designated by BE contains a NULL value.
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See also:
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NULL
The Online and Rich Client Samples projects (program VA08 and RVA08)
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