Question

Got a query that when I try and run it it returns Conversion failed when converting the nvarchar value ‘0003/’ to data type int.

Query is

SELECT

name,
date,
CAST(('0' + Location + '/' + ID) AS nvarchar(50)) AS [UniqNumber]

FROM
Table

Upon this it returns Conversion failed when converting the nvarchar value ‘0003/’ to data type int. Location and ID are both ints.

Answer 1

You need to cast the inputs.

'0' + CAST(Location AS VARCHAR(20)) + '/' + CAST(ID AS VARCHAR(20))

int has higher data type precedence than the string datatypes. If you do string + int it will try and cast the string to an integer and add it rather than casting the integer to a string and concatenating it.