在这个例子中，如果目标和源数据表有匹配的行，就实行更新操作。
In this example, and update occurs if the target and source have matching row.
您将以PERSONAL数据表开始，并且使用一个JOIN操作从PROFESSION数据表中获得职业信息。
You will start with the PERSONAL table and use a JOIN operation to get the professional information from the profession table.
您将以PERSONAL数据表开始，并且使用一个JOIN操作从PROFESSION数据表中获得职业信息。
You will start with the PERSONAL table and use a JOIN operation to get the professional information from the profession table.
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