Flash cards
Review the key moves
1/4
Core idea
What is the main idea behind MySQL COALESCE() 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.
___(NULL, NULL, NULL, 'ExampleSite.com', NULL, 'Example.com');3Order
Put the learning moves in the order that makes the concept easiest to apply.
The COALESCE() function returns the first non-null value in a list.
Definition and Usage
MySQL COALESCE() Function
Example
SELECT
COALESCE(NULL, NULL, NULL, 'ExampleSite.com', NULL, 'Example.com');Definition and Usage
The COALESCE() function returns the first non-null value in a list.
Syntax
COALESCE(
val1
,
val2
,
....
,
val_n
)Parameter Values
| Parameter | Description |
|---|---|
| val1, val2, val_n | Required. The values to test |
Technical Details
| Works in: | From MySQL 4.0 |
|---|