题目内容

下列为防止幻读而设置的隔离级别，语句正确的是

A. SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
B. SET ISOLATION LEVEL READ UNCOMMITTED;
C. SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
D. SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;

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A. SELECT @tx_isolation;
B. SELECT TRANSACTION LEVEL
C. SELECT @@tx_isolation;
D. SELECT @@transaction;

A. 脏读
B. 幻读
C. 重复读
D. 以上都不对

A. READ UNCOMMITTED
B. READ COMMITTED
C. REPEATABLE READ
D. SERIALIZABLE