Concurrency control is described as two transactions running at the same time that can enter the same database rows at different times. These simultaneous accesses are known as collisions, and if they are not treated properly, they may result in errors or inconsistency. "Overlapping is possible with higher concurrency".

• Interpret the TWO (2) most main concerns with concurrent transaction execution.

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The two most main concerns with concurrent transaction execution are Lost updates This occurs when two transactions simultaneously modify the same dat... View the full answer