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Editorial Team
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Asked: 2026-05-24T03:22:54+00:00

According to microsoft documentation , the behavior of the ‘BETWEEN’ operator should be a

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According to microsoft documentation, the behavior of the ‘BETWEEN’ operator should be a closed interval both on the left and the right side, however, the following code:

SELECT CASE WHEN (1 BETWEEN 1 AND 2) THEN 'YEAH' ELSE 'NO' END AS [closed in the left],
       CASE WHEN (1 BETWEEN 2 AND 1) THEN 'YEAH' ELSE 'NO' END AS [closed in the right]

shows otherwise. Can you reproduce it? What do you think?

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1 Answer

  1. Editorial Team

    The minimum value must always be specified first when using BETWEEN. The documentation you cited indicates that:

    BETWEEN returns TRUE if the value of test_expression is greater than
    or equal to the value of begin_expression and less than or equal to
    the value of end_expression.

    so your second CASE is actually testing:

    1 >= 2 AND 1 <= 1
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