Since the string literals are treated as bind params, database considers them as different.
eg : PostgreSQL
select count,

to_char(

.requested_delivery_date_time at time zone 'Asia/Kolkata',

'DD'

)

from table_name

group by

to_char(

.requested_delivery_date_time at time zone 'Asia/Kolkata',

'DD'

)

Here I have two literals only, but during execution it will be 4 parameters, which will throw error complaining select and groupBy are different.