Overview
The CONCAT() function is used to concatenate one or more input values into a single result. It supports all data types in Oxla, except TIMESTAMPTZ, and the output will be returned as a concatenation of the input values.
Special cases: Returns NULL if there are no input rows or NULL values.
Examples
Case 1: Basic CONCAT() function
The below example uses the CONCAT() function to concatenate three values = into a single result:
SELECT CONCAT ('Oxla', '.', 'com') AS "Website";
The final result will be as follows:
+------------+
| Website |
+------------+
| Oxla.com |
+------------+
Case 2: CONCAT() function using column
We have an example of a payment table that stores customer payment data.
CREATE TABLE payment (
paymentid int,
custFirstName text,
custLastName text,
product text,
ordertotal int
);
INSERT INTO payment
(paymentid, custFirstName, custLastName, product, ordertotal)
VALUES
(9557451,'Alex','Drue','Latte',2.10),
(9557421,'Lana','Rey','Latte',2.10),
(9557411,'Tom','Hanks','Americano',1.85),
(9557351,'Maya','Taylor','Cappuccino',2.45),
(9557321,'Smith','Jay','Cappuccino',2.45),
(9557311,'Will','Ritchie','Americano',1.85);
The above query will display the following table:
+------------+----------------+----------------+--------------+---------------+
| paymentid | custFirstName | custLastName | product | ordertotal |
+------------+----------------+----------------+--------------+---------------+
| 9557451 | Alex | Drue | Latte | 2.10 |
| 9557421 | Lana | Rey | Latte | 2.10 |
| 9557411 | Tom | Hanks | Americano | 1.85 |
| 9557351 | Maya | Taylor | Cappuccino | 2.45 |
| 9557321 | Smith | Jay | Cappuccino | 2.45 |
| 9557311 | Will | Ritchie | Americano | 1.85 |
+------------+----------------+----------------+--------------+---------------+
The following query will concatenate values in the custFirstName and custLastName columns of the payment table:
SELECT CONCAT (custFirstName, ' ', custLastName) AS "Customer Name"
FROM payment;
It will display an output where spaces separate the first and last names.
+-----------------+
| Customer Name |
+-----------------+
| Tom Hanks |
| Lana Rey |
| Alex Drue |
| Will Ritchie |
| Smith Jay |
| Maya Taylor |
+-----------------+
Case 3: CONCAT() function with NULL
We use the CONCAT() function in the following example to concatenate a string with a NULL value:
SELECT CONCAT('Talent Source ',NULL) AS "concat";
The result shows that the CONCAT function will skip the NULL value:
+------------------+
| concat |
+------------------+
| Talent Source |
+------------------+
