Does your tsau_pre_msges table have a field called ‘Cnt1′ ? (you are using Cnt1 as an alias for your count in the first query, but you are also using it as a field in your second query).

Also, your first query returns just 1 row, but the second one returns many rows. How exactly do you want to combine them ?

Additionally, the database version is more important than the Toad version used to connect to the database.