CONCAT_WS()
Description
This function CONCAT_WS() stands for Concatenate With Separator and is a special form of CONCAT(). The first argument is the separator for the rest of the arguments. The separator is added between the strings to be concatenated. The separator can be a string, as can the rest of the arguments. If the separator is NULL, the result is NULL.
Syntax
- Syntax 1
> CONCAT_WS(separator,str1,str2,...)
- Syntax 2
> CONCAT_WS(separator,str1,NULL,str1,...);
Arguments
| Arguments | Description |
|---|---|
| str | Required. both CHAR and VARCHAR are supported. |
Examples
```SQL SELECT CONCAT_WS(',','First name','Second name','Last Name'); +--------------------------------------------------+ | concat_ws(,, First name, Second name, Last Name) | +--------------------------------------------------+ | First name,Second name,Last Name | +--------------------------------------------------+ 1 row in set (0.01 sec)
SELECT CONCAT_WS(',','First name',NULL,'Last Name'); +-------------------------------------------+ | concat_ws(,, First name, null, Last Name) | +-------------------------------------------+ | First name,Last Name | +-------------------------------------------+ 1 row in set (0.01 sec) ```