...重复读(Reapeatable Read,RR) 读稳定性(Read Stability,RS) 游标稳定性(Cursor Stability,CS) 未提交的读(Uncommitted Read,UR) 隔离级别是根据称为现象(Phenomena)的三个禁止操作序列来声明的: 脏读(Dirty Read):在事务A提交修改结果之前,其他事务即可...
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... No Yes Yes Yes 未提交的读 oh yes yes yes 哦!是的 yes yes yes no 退休金现金流计算 ...
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... 可重复读(REPEATABLE READ) 提交的读(READ COMMITTED) 未提交的读(READ UNCOMMITTED) ...
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将分割镜像初始化为快照时,将执行崩溃恢复,回滚所有未提交的事务,并使数据库可以被所有读或写操作访问。
The initialization of the split mirror as snapshot performs a crash recovery, rolls back all uncommitted transactions, and makes the database available for any read or write operation.
例如,如果一个成员正在更新一行数据,那么另一个成员就不能以未提交读(uncommitted read)以外的任何隔离级别读取这一行。
For example, if one member is updating a row, it would not be proper for another member to read the row with any other isolation level than uncommitted read.
脏读:A 1检索a 2未提交的数据。
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