Discussion
Which of the following refers to the SQL Server transaction isolation level which places and holds locks on all rows that are read?
Answer: A
Correct answer: REPEATABLE READ
Repeatable read holds shared locks on every row it reads until the transaction ends, so no other transaction can change a row that has been read and a second read gives the same values. It does not lock ranges, so a row inserted into the range can still appear - the phantom that serializable prevents.
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