right now i am using microsoft sql server for my database in my dev app. in future if i want to migrate my database in google spanner what guidelines should i follow from right now so then migration should be easy in feature. also does google provide any migration tools like Microsoft® Data Migration Assistant.
SYNOPSIS
gcloud spanner instances create INSTANCE --config=CONFIG
--description=DESCRIPTION --nodes=NODES [--async] [GLOBAL-FLAG ...]
does spanner has any local emulator so i can install it in my local machine and test it before
gcloud spanner instances create --help