Scoring
Create Score (id scoreId, sourceId competition1, targetId ben)
Create score by targetId alice, sourceId competition1
Create score by targetId alice, sourceId competition2
Create score by targetId cat, sourceId competition1
Show Target (id ben)
Show Target of id alice, sourceId competition2
Show Targets By Score
Show Targets By Score (but only targets alice and cat)
Update Score with id scoreId
Delete Scores for target alice
Delete Score with id scoreId
Show Target and Show Targets by Score in a tx
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