Hacker News Reader

IDEA has some pretty slick database features, including some of the things you mentioned: https://www.jetbrains.com/idea/features/database_tools.html

Only in the Ultimate edition though, so quite pricey..

0xDBE is really nice: https://www.jetbrains.com/dbe/ Though it's still in alpha.

I use it a lot, it's great for schema & queries but I don't really like it for data manipulation & export though, a bit cumbersome for my taste.