Example: Ordering By a Column Alias Name - Analytics Database - Teradata Vantage

SQL Data Manipulation Language

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2024-04-05
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lifecycle
latest
Product Category
Teradata Vantage™

You cannot explicitly order by a column alias name. You must specify the column position of the column aliased by the name in the select list.

Suppose you have the following base table definition:

   CREATE TABLE t1
    (i INTEGER,
     j INTEGER,
     k INTEGER);

The following query against this table fails because it specifies ordering on the column alias name j, which the system interprets as column j in table t1 rather than as the expression SUM(t1.j):

   SELECT t1.i, SUM(t1.j) AS j, t1.k
   FROM t1
   GROUP BY 1,3
   ORDER BY j;

Result:

   *** Failure 3504 Selected non-aggregate values must be part of the associated group.

The following rewrite of the query successfully performs the desired ordering:

   SELECT t1.i, SUM(t1.j) AS j, t1.k
   FROM t1
   GROUP BY 1,3
   ORDER BY 2;