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Oracle NVL2 function
Oracle/PLSQL NVL2 function extends the functionality of the NVL function. It replaces the value when a Null value is encountered and also when a non-Null value is encountered.
Oracle/PLSQL syntax of NVL2 function
NVL2( string1_id, value_if_NOT_null_id, value_if_null_id )
Parameters & arguments of NVL2
- string1_id – line to check for Null value.
- value_if_NOT_null_id – this value is returned if string1 has no Null value.
- value_if_null_id – this value is returned if string1 has a Null value.
NVL2 function in the following versions of Oracle/PLSQL
| Oracle 12c, Oracle 11g, Oracle 10g, Oracle 9i, Oracle 8i |
Let’s consider some examples of Oracle NVL2 function and learn how to use NVL2 function in Oracle PLSQL.
SELECT NVL2(suppl_city, 'Completed', 'n/a')
FROM suppls;
The SQL query will return ‘n/a’ if the suppl_city field contains a null value. Otherwise, it will be the ‘Completed’ value.
Another example of using the NVL2 function in Oracle/PLSQL:
SELECT suppl_id,
NVL2(suppl_desc, suppl_name, suppl_name2)
FROM suppls;
This SQL query will return suppl_name2 if suppl_desc contains a Null value. Otherwise, it will return the suppl_name field.
NVL2 FUNCTION IN ORACLE SQL WITH EXAMPLE
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