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摘要: COUNT COUNT(*) 和 COUNT(1) 根据 MySQL 官方文档的描述: InnoDB handles SELECT COUNT(*) and SELECT COUNT(1) operations in the same way. There is no performance dif 阅读全文
posted @ 2021-09-23 18:19 kingron 阅读(83) 评论(0) 推荐(0) 编辑