What is NVL in SQL command?

NVL(expr1, expr2) : In SQL, NVL() converts a null value to an actual value. Data types that can be used are date, character and number. Data type must match with each other i.e. expr1 and expr2 must of same data type.

What is NVL in SQL with example?

NVL lets you replace null (returned as a blank) with a string in the results of a query. If expr1 is null, then NVL returns expr2 . If expr1 is not null, then NVL returns expr1 .

What is an example of NVL?

Another example using the NVL function in Oracle/PLSQL is: SELECT supplier_id, NVL(supplier_desc, supplier_name) FROM suppliers; This SQL statement would return the supplier_name field if the supplier_desc contained a null value. Otherwise, it would return the supplier_desc.

What is NVL in coding?

Unlike a lot of programming/database terms, NVL is not an acronym for anything. It’s just NVL, though it can help to think of it as Null VaLue. NVL is a substitution function; that is, it is used to display one value if another value is NULL. And not just zero, but NULL, empty, void.

Does MySQL have NVL?

You only used NVL in Oracle; it is not available in MySQL or SQL Server.

How do I find NVL in SQL Server?

In Oracle, NVL(exp1, exp2) function accepts 2 expressions (parameters), and returns the first expression if it is not NULL, otherwise NVL returns the second expression. In SQL Server, you can use ISNULL(exp1, exp2) function.

Can we use NVL in SQL Server?

You only used NVL in Oracle; it is not available in MySQL or SQL Server. NVL is not an acronym for anything, unlike a lot of programming/database terminology.

What is NVL in MySQL?

In Oracle, the NVL function allows you to replace NULL with the specified expression i.e. it returns the first operand if it is not NULL, otherwise it returns the second operand. In MySQL you have to use IFNULL function.

What is SQL decode?

DECODE compares the expression to each search value one by one. If expression is equal to a search, then the corresponding result is returned by the Oracle Database. If a match is not found, then default is returned. If default is omitted, then Oracle returns null.