oldguo-MySQL 8.0 OCP 原题解析-Q12

Question 12:

Your MySQL server was upgraded from an earlier major version.
The sales database contains three tables, one of which is the transactions table, which has 4 million rows.
You are running low on disk space on the datadir partition and begin to investigate.
Which two statements is true?
Examine these commands and output:

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A) Executing SET GLOBAL innodb_row_format=COMPRESSED and then ALTER TABLE transactions will free up disk space.

B) The transactions table was created with innodb_file_per_table=OFF.

C) Truncating the sales and leads table will free up disk space.

D) Executing ALTER TABLE transactions will enable you to free up disk space.

E) Truncating the transactions table will free up the most disk space.