DB2 SQL Select All With Columns As

问题

I am working with some SQL queries on DB2. Is it possible to select all the columns in a table and also specify certain conditions using the "as" keyword within that select statement? For example, is this query possible:

select
  *,
  col1 + col2 as sum1,
  col3 - col4 as dif1
from 
  table;

Whenever I attempt this, I am getting the SQL0104 error and it is saying "Token , was not valid. Valid tokens: FROM INTO".

Thank you for your help.

EDIT: This query is running inside an SQLRPGLE program on an AS400.

回答1:

Put your table alias in front of the *. So:

select
  t.*,
  col1 + col2 as sum1,
  col3 - col4 as dif1
from 
  table t;

来源：https://stackoverflow.com/questions/50820397/db2-sql-select-all-with-columns-as