Flash cards
Review the key moves
1/4
Core idea
What is the main idea behind SQL Server ISNULL() Function?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
1Quick choice
Which statement best captures the main point of this lesson?
2Fill blank
Complete the missing token from the example code.
___ ISNULL(NULL, 'ExampleSite.com');3Order
Put the learning moves in the order that makes the concept easiest to apply.
The ISNULL() function returns a specified value if the expression is NULL.
Definition and Usage
SQL Server ISNULL() Function
Example
SELECT ISNULL(NULL, 'ExampleSite.com');Definition and Usage
The ISNULL() function returns a specified value if the expression is NULL.
If the expression is NOT NULL, this function returns the expression.
Syntax
ISNULL(
expression
,
value
)Parameter Values
| Parameter | Description |
|---|---|
| expression | Required. The expression to test whether is NULL |
| value | Required. The value to return if expression is NULL |
Technical Details
| Works in: | SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse |
|---|