The cardinality represents the estimated number of rows returned from the access plan operator.
基数(cardinality)表示访问计划操作符所返回的行的估计数目。
Estimated rows: estimated number of rows returned, as estimated by the optimizer for the statement.
Estimated Rows：优化器估计此语句返回的行数。
The optimizer calculates its cardinality estimate — that is, the estimated number of rows returned by the query — based on the statistics available.
优化器根据可用的统计信息计算基数的估计值，即预计查询返回的行数。
应用推荐