I was asked to design In-memory SQL-like Database in one of the interviews(can't reveal company name), that supports following operation.

1. It should be possible to create or delete tables in a database.
2. The supported column types are string and int.
3. It should be possible to insert records in a table.
4. It should be possible to print all records in a table.
5. It should be possible to filter and display records whose column values match a given value.

Any help would be appreciated :)
Also it would be great if people can suggest some good resources(practice problems) for Machine Coding Rounds.

YOE - 1.5, Location - India