如果对目标表定义了冲突，冲突表与诊断表将保留没有满足约束的行。
If the target table has violations defined, the violation table and diagnostic table hold the non-conforming rows that fail to satisfy constraints.
在第35行上的合并成功了，因为该处没有发生任何约束冲突。
The merge becomes successful at line 35, because you don't violate any constraint there.
第22行到28行为每周的每天定义了一个约束。
Lines 22 through 28 define one constraint for each day of the week.
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