企图使用禁止的 SQL 语句(PROHIBITED SQL STATEMENT ATTEMPTED) 不允许读取 SQL 数据(READING SQL DATA NOT PERMITTED) 外部过程调用例外(EXTERNAL ROUTINE INVOCATION EXCEPTION) ..
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RR 不允许幻象读取,它会在选择行时创建一个 S(share)表锁定。
RR does not allow phantom reads by creating an S (share) table lock when selecting rows.
SQL 2005有一个 基于快照的隔离级别 ,它能在不允许“脏读”的情况下避免数据读取阻塞数据写入,或者数据写入阻塞数据读取。
SQL 2005 has snapshot-based isolation levels that prevent readers from blocking writers or writers from blocking readers without allowing dirty reads.
这是不允许的,因为代码不能从只写标识符中读取值。
This is not allowed because code cannot read values from write-only identifiers.
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