docs: sync SQL diagrams from cockroach#23#20

ebembi-crdb wants to merge 1 commit intomastercockroachdb/generated-diagrams:masterfrom

diagram-sync/15e10e1a52756f6d8a44d4fe3e902a351c5a9479cockroachdb/generated-diagrams:diagram-sync/15e10e1a52756f6d8a44d4fe3e902a351c5a9479Copy head branch name to clipboard