More than 2 columns in a CONCAT function

问题

In SQL Server 2012 I want to concat 5 columns into 1 but in the query it works but when I put in in a view it gives me an error like

Msg 174, Level 15, State 1, Line 3
The CONCAT function requires 2 argument(s).

What's the problem so I can fix it because concat is a good function for concatenate more than 1 column because if its null they make it empty..

CODE:

SELECT        
   'Aan ' + A.Name AS 'Naam', 
   { fn CONCAT('T.a.v. ', C.Salutation + ' ', C.FirstName + ' ', C.MiddleName + ' ', C.LastName) } AS 'T.a.v.',   
   ISNULL(ISNULL(A.Address1_Line2, A.Address1_Line1), 
   C.Address1_Line2) AS 'Adres', 
   ISNULL(A.Address1_PostalCode + ' ' + A.Address1_City, A.Address2_PostalCode + ' ' + A.Address2_City) AS 'Woonplaats',
   'heer' + ' ' + ISNULL(C.MiddleName + ' ', N'') + ISNULL(C.LastName, N'') AS 'Aanhef'  
FROM            
    dbo.Account AS A 
FULL OUTER JOIN  
    dbo.Contact AS C ON A.Name = C.AccountIdName  
WHERE 
    (C.Salutation = 'Dhr.') AND (A.Name IS NOT NULL) AND (A.StatusCode = 1) 
    AND (ISNULL(C.StatusCode, 1) = 1) OR (C.Salutation = 'dhr.') AND (A.Name IS NOT NULL) AND (A.StatusCode = 1) AND (ISNULL(C.StatusCode, 1) = 1)

回答1:

There must be an error somewhere else in your view!!

Ok, then what I did with your code was to change this line

{ fn CONCAT('T.a.v. ', C.Salutation + ' ', C.FirstName + ' ', C.MiddleName + ' ', C.LastName) } AS 'T.a.v.'

to this

CONCAT('T.a.v. ', C.Salutation + ' ', C.FirstName + ' ', C.MiddleName + ' ', C.LastName) AS 'T.a.v.'

Edit:

Just to explain the difference in code, is that the one with { fn ....} is a Canonical function and microsoft promise that it will work on all ODBC connections.

From MSDN:

Canonical functions are functions that are supported by all data providers, and can be used by all querying technologies. Canonical functions cannot be extended by a provider.

回答2:

I had the same problem and all the other answers did not work for me and i did not want to use the one from Andrei.

I managed to create the view using a create view statement.

CREATE VIEW ViewName AS
SELECT        
   'Aan ' + A.Name AS 'Naam', 
   { fn CONCAT('T.a.v. ', C.Salutation + ' ', C.FirstName + ' ', C.MiddleName + ' ', C.LastName) } AS 'T.a.v.',   
   ISNULL(ISNULL(A.Address1_Line2, A.Address1_Line1), 
   C.Address1_Line2) AS 'Adres', 
   ISNULL(A.Address1_PostalCode + ' ' + A.Address1_City,     A.Address2_PostalCode + ' ' + A.Address2_City) AS 'Woonplaats',
   'heer' + ' ' + ISNULL(C.MiddleName + ' ', N'') + ISNULL(C.LastName, N'') AS 'Aanhef'  
FROM dbo.Account AS A 
FULL OUTER JOIN  
    dbo.Contact AS C ON A.Name = C.AccountIdName  
WHERE 
    (C.Salutation = 'Dhr.') AND (A.Name IS NOT NULL) AND (A.StatusCode = 1) 
    AND (ISNULL(C.StatusCode, 1) = 1) OR (C.Salutation = 'dhr.') AND (A.Name IS NOT NULL) AND (A.StatusCode = 1) AND (ISNULL(C.StatusCode, 1) = 1)

回答3:

I got the same error. Here is how it happened. I used the query/view builder in SQL Server (2014) Management Studio. I typed the function "CONCAT (...", yet it transformed it to "{fn CONCAT(...)}". Then I got the error despite having more than one item.

I got rid of the "{fn ... }" and it worked fine.

回答4:

create CONCAT FUNCTION in view SQL Server must requires 2 arguments. So you can try this :

SELECT
concat(
    concat('T.a.v. ', C.Salutation + ' '), 
    concat(C.FirstName + ' ', concat(C.MiddleName + ' ', C.LastName)) 
)  AS 'T.a.v.'

回答5:

I had this issue when I wanted to create view using designer and the ssms designer automatically added fn{ exp ….} but I instead used script, Cerate View ViewName my concat script

this worked with no issue

来源：https://stackoverflow.com/questions/16567121/more-than-2-columns-in-a-concat-function

标签

sql-server

sql-server-2012

concat