database performance improvement : use foreach() when possible

[samsonasik]

Previously, there are count() and then loop with for(), the foreach actually should already can handle it.

Checklist:

• Securely signed commits

[lonnieezell]

Honestly, the performance difference you're going to see here is likely so close as to be non-existent. But this is cleaner, easier to read, and doesn't look like it will break anything so I'm down.