How to convert values in certain colum to comma separated list?

[report_generator]

I have taken a  table in which rows are being repeated because of multiple values in a certain column. Is there any way that i can convert the column which is causing repetition to comma separated list so that my other column values donot repeat unnecessarily?

[DerekGannaway]

In your query you can use the GROUP_CONCAT function and GROUP BY the field you don't want duplicated to achieve that result. Here's an example table with duplicated data:

 

State	City
New York	New York City
New York	Syracuse
California	Los Angeles
California	San Francisco
Texas	Austin

 

With the below query

SELECT state, GROUP_CONCAT(city SEPARATOR ", ") AS cities FROM table GROUP BY state[/code]

The data will now be displayed as

state	cities
New York	New York City, Syracuse
California	Los Angeles, San Francisco
Texas	Austin

 

You can also sort the cities or remove duplicates from that field as well with additional functions inside the GROUP_CONCAT. More information about GROUP_CONCAT can be found at https://dev.mysql.com/doc/refman/8.0/en/group-by-functions.html#function_group-concat