How to do " SELECT Q1.todays_count AS current_date - 1 " in Teradata?? [Current syntax errors is what I'm getting now]

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How to do " SELECT Q1.todays_count AS current_date - 1 " in Teradata?? [Current syntax errors is what I'm getting now]

Does anyone know how I can make the following work in Teradata?

Select

Q1.todays_count     as current_date

,Q2.todays_count     as current_date - 1

,Q3.todays_count     as current_date - 2

,Q4.todays_count     as current_date - 3