What is the negative number means for account and asset ID?
Is possible to use PHP to interactive with DB?
Thanks
What is the negative number means for account and asset ID?
Accounts and asset ID's are unsigned 64 bit integers. As Java doesn't have explicit support for unsigned integers sometimes you get the signed representation and hence a negative number. You can convert between those using the API: Utils API
The database is internal, you cannot interact with it externally.