Is there anyone here who is good with SQL/databases?

[ItsACrazyWorld]

I've currently got this database filled with dummy data, yet the performance for certain queries is terrible (like 20-30s). I know there's a fair few guys in IT here, so if anyone would be happy to help out, then I'd really appreciate it

 

[Mountainbikecel]

maybe i can help you

 

[mNFwTJ3wz9]

specifics?