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Exam 1z0-053 topic 20 question 13 discussion

Actual exam question from Oracle's 1z0-053
Question #: 13
Topic #: 20
[All 1z0-053 Questions]

Which NLS parameter can be used to change the default Oracle sort method from binary to linguistic for the SQL SELECT statement?

  • A. NLS_LANG
  • B. NLS_COMP
  • C. NLS_SORT
  • D. None of the above
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Suggested Answer: D 🗳️
Neither NLS_SORT nor NLS_COMP cannot change sorting from BINARY to LINGUISTIC. Because the NLS_SORT depends on NLS_COMP, if they are different, the sorting method will always be BINARY.
(Refer to NLS_SORT) The exact operators and query clauses that obey the NLS_SORT parameter depend on the value of the NLS_COMP parameter. If an operator or clause does not obey the NLS_SORT value, as determined by NLS_COMP, the collation used is BINARY.
The BINARY comparison is faster and uses less resources than any linguistic comparison but for text in a natural language, it does not provide ordering expected by users.
The value of NLS_SORT affects execution plans of queries. Because a standard index cannot be used as a source of values sorted in a linguistic order, an explicit sort operation must usually be performed instead of an index range scan. A functional index on the NLSSORT function may be defined to provide values sorted in a linguistic order and reintroduce the index range scan to the execution plan.
NLS_COMP specifies the collation behavior of the database session.
by [deleted] at April 4, 2025, 8:32 a.m.

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