Clear all user tables in the SQL Server database

Clear all user tables in the database
Declare crsr cursor
For select [name] From DBO. sysobjects
Where objectproperty (ID, n'istable') = 1 and type = 'U' and [name] <> 'dtproperties' -- and crdate... -- You can specify the table creation date for the crdate field.
Open crsr
Declare @ tblname sysname
Fetch crsr into @ tblname
Exec ('truncate table '+ @ tblname )
While @ fetch_status = 0
Fetch next from crsr into @ tblname
Exec ('truncate table '+ @ tblname )
Close crsr
Deallocate crsr -- delete to release the cursor