Bitanshu Das Bitanshu Das - 4 months ago 27
SQL Question

Concatenate in PostgreSQL

I have a table with width and height (both integers). I want to display it as are.
For eg: width = 300 and height = 160.
Area = 300 x 160.
I am using the following query

select cast(concat(width,'x',height) as varchar(20)) from table;


or

select concat(width,'x',height) from table;


but I am getting the following error.

ERROR: function concat(character varying, "unknown", character varying) does not exist

Hint: No function matches the given name and argument types. You may need to add explicit type casts.


Can anyone tell me how to do this?
Thanks

Answer

Use || as per: https://www.postgresql.org/docs/current/static/functions-string.html

select width || 'x' || height from table;

Sample fiddle: http://sqlfiddle.com/#!15/f10eb/1/0