How Can we concatenate multiple MySQL Rows Into One Field?

In this post, we will learn How Can we concatenate multiple MySQL rows into one field, which we can perform using a built in function group concat, which is used for merging two or more rows into a single field. For the same, we have given an example with a pseudo code which could help in getting the concepts and understanding the use better.



As we know simple meaning of concatenate is to add two or more entities when we are required to do so and we can do this in different ways and on different entities like variables such as String, character and on different immutable variables. But here we will discuss the adding of two or more rows of the example of the table given below.

product_id	product_name
1       	Product A
2       	Product B
3       	Product C

To perform concatenation we have given an example of pseudo code below which we can simply follow to get it done.

SELECT GROUP_CONCAT( product_name SEPARATOR ', ') AS 'Product List'
FROM products;

Here we have the result of the above code as followed where we have Concatenated two rows.

Product List
Product A, Product B, Product C

In this query, the group concat function is used to concatenate all Product Name values into a single field. The Separator parameter specifies the separator to use between each concatenated value (in this case, a comma and a space).

You can also add a Where clause to filter the rows that you want to add. For example, if you only want to concatenate the names of products with an id  between 1 and 2, you can use the following query:

SELECT GROUP_CONCAT(product_name SEPARATOR ', ') AS 'Product List'
FROM products
WHERE product_id BETWEEN 1 AND 2;

which will result as followed on running the code above where we simply concated two products.

Product List
Product A, Product B

In this query, the Where clause filters the rows that have a Product Id between 1 and 2, and the Group Concate function add the Product name values for those rows.


To learn more about whether Can I concatenate multiple MySQL rows into one field Which we can do in different ways to know them you may visit: Cby stack overflow.

To learn more about MySQL Tutorial, Solutions to the problems we faced during solving the problems, and getting different concepts that could help you in growing your knowledge with some examples visit: MySQL Tutorials And Problems.


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