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Oracle® Database SQL Language Reference
11g Release 2 (11.2)

Part Number E26088-02
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SQLRF20043

Column Expressions

A column expression, which is designated as column_expression in subsequent syntax diagrams, is a limited form of expr. A column expression can be a simple expression, compound expression, function expression, or expression list, but it can contain only the following forms of expression:

No other expression forms described in this chapter are valid. In addition, compound expressions using the PRIOR keyword are not supported, nor are aggregate functions.

You can use a column expression for these purposes:

The combined components of a column expression must be deterministic. That is, the same set of input values must return the same set of output values.

See Also:

"Simple Expressions", "Compound Expressions", "Function Expressions", and "Expression Lists" for information on these forms of expr
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