Hi @jatin_rajpura ,
Welcome to the Google Cloud Community!
You can check more about pricing:
In Cloud SQL, pricing is composed of:
- CPU and memory pricing
- storage and network pricing
- instance pricing
In Cloud Spanner, pricing is composed of:
- The amount of compute capacity in your instance
- The amount of storage that your databases use
- The amount of storage that your backups use
- The amount of network bandwidth used
Also, you can also check in with Cloud Billing Support to assist with your billing needs.
let me know if it helped, thanks!