例文
- In contrast, snapshot isolation permits write skew anomalies.
- Also, write skew is possible when one transaction updates column to some color whereas competing transactions updates the same column to some other color ( s ).
- In a " write skew " anomaly, two transactions ( T1 and T2 ) concurrently read an overlapping data set ( e . g . values V1 and V2 ), concurrently make disjoint updates ( e . g.