摘要
对UPDATE命令 ,要注意 ,当前table/.DBF中的每个记录 ,可能在更新table/.DBF中有多个匹配记录 .若有多个匹配记录 ,当前table/.DBF的记录则被每一条匹配记录所更新 .若当前table/.DBF中含有同样键值字段的记录 。
The UPDATE command, notes that for each record in the current table/. DBF, can be multiple matching records in the update table/. DBF. If there are multiple matching records, the record in the current table/. DBF is updated by each of the matching records. If the current table/. DBF contains identical key field records, only the first of the matching records is updated.
