When distribution statistics are generated for the column "TYPE," the optimizer knows the real frequency of each model.

而一旦生成了关于“TYPE”列的分布统计信息，优化器即可了解每种型号真正的出现频率。

youdao

When distribution statistics are generated for the column "TYPE," the optimizer knows the real frequency of each model.

而一旦生成了关于“TYPE”列的分布统计信息，优化器即可了解每种型号真正的出现频率。

youdao