Concat function
The string functionCONCAT has the role of concatenating two or more strings into a single string.
The CONCAT function can be used with NULL values, CONCAT function implicitly converts null values to empty strings.
Basic Concat Example
SELECT CONCAT ('Daniel', ' - ','Scott') AS FullName;
Result: Daniel - Scott
Using CONCAT with NULL values
SELECT CONCAT( 'Test', NULL, 'SQL' );
Result: TestSQL
Complex Concat Example
Cities table:
| CITY_ID | NAME | STATE |
|---|---|---|
| 1 | New York | New York |
| 2 | Los Angeles | California |
| 3 | Chicago | Illinois |
| 4 | San Antonio | Texas |
| 5 | San Diego | California |
SELECT CONCAT (city_id, ' / ', name, ' / ', state) AS Result
FROM cities WHERE state='California';
Concat Result:
| Result |
|---|
| 2 / Los Angeles / California |
| 5 / San Diego / California |
See also: T-SQL Functions -> Charindex -> Left -> Len -> Lower -> Ltrim
