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    Boolean

    Function NameDescription
    IS [NOT] DISTINCT FROMCompares two expressions to determine whether they have the same or different values. NULLs are considered as comparable values.
    ISFALSETests whether the input expression is false. If it is, returns a value of true.
    IS [NOT] NULLDetermines if an expression is NULL or not NULL. Alias for the function ISNULL/ISNOTNULL.
    ISNUMERICDetermines whether an expression is a valid numeric type (DECIMAL, DOUBLE, INT, BIGINT, VARBINARY).
    ISTRUEReturns TRUE if the input expression evaluates to TRUE.
    IS_MEMBERReturns whether the current user is a member of the specified role.