Windows batch scripting: Showing date, time and all output in logs - windows

Question

I have made a script that I am going to call using windows scheduler to back up a Ruby on Rails app I have made.
When I call the command normally in a command window, the output looks like this
C:\Users\admin\Desktop\app>heroku db:pull --confirm app
Loaded Taps v0.3.23
Auto-detected local database: postgres://db:pass#127.0.0.1/app?encoding=utf8
Warning: Data in the database 'postgres://db:pass#127.0.0.1/app?encoding=utf8' will be overwritten and
will not be recoverable.
Receiving schema
Schema: 0% | | ETA: --:--:--
Schema: 20% |======== | ETA: 00:00:21
Schema: 40% |================ | ETA: 00:00:18
Schema: 60% |========================= | ETA: 00:00:12
Schema: 80% |================================= | ETA: 00:00:05
Schema: 100% |==========================================| Time: 00:00:29
Receiving indexes
schema_migrat: 0% | | ETA: --:--:--
schema_migrat: 100% |==========================================| Time: 00:00:05
users: 0% | | ETA: --:--:--
users: 50% |===================== | ETA: 00:00:05
users: 100% |==========================================| Time: 00:00:10
Receiving data
5 tables, 1,000 records
table1: 100% |==========================================| Time: 00:00:00
table2: 100% |==========================================| Time: 00:00:00
table3: 100% |==========================================| Time: 00:00:00
table4: 100% |==========================================| Time: 00:00:00
table5: 100% |==========================================| Time: 00:00:01
Resetting sequences
Here is my .bat:
heroku db:pull --confirm app >> log.txt
If I run this twice, this is the output that goes into a file, log.txt
Loaded Taps v0.3.23
Auto-detected local database: postgres://db:pass#127.0.0.1/webapp_development?encoding=utf8
Warning: Data in the database 'postgres://db:pass#127.0.0.1/webapp_development?encoding=utf8' will be overwritten and will not be recoverable.
Receiving schema
Receiving indexes
Receiving data
5 tables, 1,000 records
Resetting sequences
Loaded Taps v0.3.23
Auto-detected local database: postgres://db:pass#127.0.0.1/webapp_development?encoding=utf8
Warning: Data in the database 'postgres://db:pass#127.0.0.1/webapp_development?encoding=utf8' will be overwritten and will not be recoverable.
Receiving schema
Receiving indexes
Receiving data
5 tables, 1,000 records
Resetting sequences
Is there any way to include the exact console output, and also include dates and times of when the script was run? Thanks in advance.
UPDATE:
Start: 19/10/2012 12:08:04.90
Schema: 0% | | ETA: --:--:--Schema: 20% |======== | ETA: 00:00:24Schema: 40% |================ | ETA: 00:00:18Schema: 60% |========================= | ETA: 00:00:13Schema: 80% |================================= | ETA: 00:00:06Schema: 100% |==========================================| ETA: 00:00:00Schema: 100% |==========================================| Time: 00:00:32
schema_migrat: 0% | | ETA: --:--:--schema_migrat: 100% |==========================================| ETA: 00:00:00schema_migrat: 100% |==========================================| Time: 00:00:05
users: 0% | | ETA: --:--:--users: 50% |===================== | ETA: 00:00:05users: 100% |==========================================| ETA: 00:00:00users: 100% |==========================================| Time: 00:00:08
schema_migrat: 0% | | ETA: --:--:--schema_migrat: 7% |== | ETA: 00:00:06schema_migrat: 100% |==========================================| Time: 00:00:00
users: 0% | | ETA: --:--:--users: 3% |= | ETA: 00:00:11users: 100% |==========================================| Time: 00:00:00
projecttechno: 0% | | ETA: --:--:--projecttechno: 6% |== | ETA: 00:00:05projecttechno: 100% |==========================================| Time: 00:00:00
technols: 0% | | ETA: --:--:--technols: 7% |== | ETA: 00:00:05technols: 100% |==========================================| Time: 00:00:00
projects: 0% | | ETA: --:--:--projects: 1% | | ETA: 00:00:54projects: 100% |==========================================| Time: 00:00:00
Loaded Taps v0.3.23
Auto-detected local database: postgres://postgres:a#127.0.0.1/webapp_development?encoding=utf8
Warning: Data in the database 'postgres://postgres:a#127.0.0.1/webapp_development?encoding=utf8' will be overwritten and will not be recoverable.
Receiving schema
Receiving indexes
Receiving data
5 tables, 1,000 records
Resetting sequences

Answer 1

Adding the date and time is easy using %date% and %time%.
You could try to redirect stderr (2) to stdout (&1), perhaps that will capture the missing output.
echo Start: %date% %time% >>log.txt
heroku db:pull --confirm app >>log.txt 2>&1
echo Stop: %date% %time% >>log.txt