考试
2021-02-25 12:23:31

(多选题)Which two&#

题目描述

AThe leaf blocks in the index are doubly linked.

BThe leaf node stores a bitmap for each key value.

CThe rows with NULL value in key columns also have entries in the index.

DThe deletion of a row from the table causes a logical deletion in index leaf block and the space becomesavailable for the new leaf entry

答案解析

[db:答案解析]

A,D

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