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The Oracle / PLSQL NVL function lets you substitute a value when a null value is I got an oracle error when I use distinct clause with NVL, but when I remove.

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NVL. The NVL function replaces a NA value or an empty string with a string. To evaluate a specified expression and replace a non- NA value or empty string with .

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NVL. Syntax. Description of echographapp.com follows. Description of the illustration echographapp.com lets you replace null (returned as a blank) with a string in the results of a query.

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Database SQL Language Reference . NVL. Syntax. Description of echographapp.com follows. Description of the illustration If expr1 is not null, then NVL returns expr1 .

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In Oracle, the NVL function can replace a NULL value with another value As you can see, the query now shows a value for the status column.

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Using the NVL function in Oracle. The NVL function is used to replace NULL values by another value. The NVL statement works like this pl/sql code.

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But then the where clause AND msg_id = NVL(P_ID, msg_ID) don't return the rows where msg_id itself is NULL. What did I miss? How to return all entries when.

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The Oracle NVL() function allows you to replace null with a more meaningful alternative in the results of a query. The following shows the syntax of the NVL().

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Most of Oracle's built-in functions are designed to solve a specific problem. If you need to The DECODE function can be thought of as an inline IF statement.

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The SQL Server ISNULL() function lets you return an alternative value when an expression is NULL: The Oracle NVL() function achieves the same result.