在SQL标准所定义的4种隔离级别，(
)是系统默认的。
A: READ
UNCOMMITTED
B: READ
COMMITTED
C: REPEATABLE
READ
D: SERIALIZABLE
)是系统默认的。
A: READ
UNCOMMITTED
B: READ
COMMITTED
C: REPEATABLE
READ
D: SERIALIZABLE
举一反三
- 以下哪种隔离级别属于“读未提交”？ A: READ UNCOMMITTED B: READ COMMITTED C: REPEATABLE READ D: SERIALIZABLE
- 当事务的隔离级别为以下级别时，可能出现脏读问题的是（ ）。 A: Read Uncommitted B: Read Committed C: Repeatable Read D: Serializable
- SQL-99标准规定的事务的4个隔离级别中，能解决读脏数据现象的级别是______。 A: READ UNCOMMITTED B: READ COMMITTED C: REPENTABLE READ D: SERIALIZABLE
- Mr.<br/>Wang asked<br/>us______Lesson<br/>one in our English<br/>book. A: to read B: read C: reads D: reading
- -- What do you think of the book?<br/>--<br/>Oh, excellent. It’s worth _______ a second time. () A: to read B: to be read C: being read D: reading