Transaction Isolation Levels

Transaction isolation levels define how independently transactions in a database can operate without affecting each other. They determine the visibility of changes made by one transaction to others, balancing data accuracy and system performance. Higher levels, like serializable, prevent conflicts but may slow things down, ensuring complete accuracy. Lower levels, like read uncommitted, allow faster access but risk seeing unconfirmed or inconsistent data. The choice depends on the need for precision versus performance in different applications, ensuring data remains reliable while optimizing system efficiency.