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Which global variables can be used to determine if a transaction is still open?

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Which global variables can be used to determine if a transaction is still open?

(a) @@NESTLEVEL

(b) @@FETCH_STATUS

(c) @@TRANCOUNT

(d) @@CONNECTIONS

This question was addressed to me in an online quiz.

The doubt is from Estimating Statistics of Expression Results topic in portion Query Processing Techniques of Database Management

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The correct choice is (c) @@TRANCOUNT

Easy explanation - PRINT @@TRANCOUNT — The BEGIN TRAN statement will increment the — transaction count by 1.

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