G-8310: eliminate violations

[PhilippSalvisberg]

There are 75 violations of G-8310 in SonarCloud.

This shows two things:

a) We do not follow our own rules
b) The rule might be too strict.

This ticket deals with a). Basically just the bad example in the rule of G-8310 should violate this rule. All other SQL code blocks should honor this rule and should be changed.