Invalid column name in DB2 - db2

Question

I'm having trouble with the column name of one of my tables.
My version of DB2 is DB2/LINUXX8664 11.1.0. I'm running it on a CentOS Linux Release 7.2.1511. My version of IBM Data Studio is 4.1.2.
The column is named "NRO_AÑO" in the table "PERIODO" in the schema "COMPRAS".
When I execute the simple query
SELECT NRO_AÑO
FROM COMPRAS.PERIODO
it yields the following error:
"NRO_AÑO" is not valid in the context where it is used.. SQLCODE=-206, SQLSTATE=42703, DRIVER=3.68.61
If I execute the query
SELECT *
FROM COMPRAS.PERIODO
it yields data with the following columns
I'm guessing it has something to do with the charsets involved, but I'm not sure where to look at.
Thanks in advance.

Answer 1

It worked for me:
[db2inst1#server ~]$ db2 "create table compras.periodo (nro_año int)"
DB20000I The SQL command completed successfully.
[db2inst1#server ~]$ db2 "insert into compras.periodo values (1)"
DB20000I The SQL command completed successfully.
[db2inst1#server ~]$ db2 "insert into compras.periodo (nro_año) values (2)"
DB20000I The SQL command completed successfully.
[db2inst1#server ~]$ db2 "select nro_año from compras.periodo"
NRO_AÑO
-----------
1
2
2 record(s) selected.
Probably, you are having a console encoding problem (putty), and you should review how the name of the column in the database is stored:
db2 "select colname from syscat.columns where tabname = 'PERIODO'"
COLNAME
--------------------------------------------------------------------------------------------------------------------------------
NRO_AÑO
1 record(s) selected.
Creating the table from Putty (SSH client) and then selecting from Data Studio, then the characters higher that 128 will have different representations. Java (DataStudio) uses UTF-8, but probably the script used to create the table used another encoding and this is having problems in the database (Putty, Windows, Notepad, etc).

Answer 2

It worked for me when I run the script from DB2 command line processor on DB2 9.7.
db2 => CREATE TABLE TEMP_TABLE(NRO_AÑO INTEGER)
DB20000I The SQL command completed successfully.
db2 => INSERT INTO TEMP_TABLE(NRO_AÑO) VALUES(1)
DB20000I The SQL command completed successfully.
db2 => SELECT * FROM TEMP_TABLE
NRO_AÑO
-----------
1
1 record(s) selected.
db2 => select colname from syscat.columns where tabname = 'TEMP_TABLE'
COLNAME
------------
NRO_AÑO
1 record(s) selected.

Answer 3

Your issue may also be that columns need to be enclosed in quotes, as found in IBM Data Studio Ver 4, example:
INSERT INTO DB2ADMIN.FB_WEB_POSTS ("UserName","FaceID", "FaceURL","FaceStory","FaceMessage","FaceDate","FaceStamp")
VALUES ('SocialMate','233555900032117_912837012103999', 'http://localhost/doculogs.nsf/index.html', 'Some Message or Story','Random Files Project for Lotus Notes, Google, Oracle App samples', '2017-09-09', '2017-09.23');