Object Query Language (OQL) is most similar to which query style and clause structure? Choose the most accurate characterization.

Difficulty: Easy

Correct Answer: Similar to SQL and uses a select-from-where structure

Explanation:


Introduction / Context:
OQL was designed to be familiar to practitioners of SQL while supporting object features such as path expressions and navigations through relationships. Its overall clause ordering and semantics strongly resemble SQL.



Given Data / Assumptions:

  • The query language is intended to be SQL-like.
  • Standard clause ordering is SELECT … FROM … WHERE …
  • Object navigation augments, not replaces, SQL-style structure.


Concept / Approach:

OQL adopts the well-known select–from–where structure. The FROM clause introduces extents or collections; WHERE filters; SELECT projects results. Additional constructs (e.g., GROUP BY) may also appear, but the basic skeleton mirrors SQL.



Step-by-Step Solution:

Identify the canonical ordering used by SQL.Map OQL clauses to the same pattern.Confirm similarity rather than difference.


Verification / Alternative check:

Textbook OQL examples consistently show SELECT–FROM–WHERE, often with path expressions in the select list or predicates.



Why Other Options Are Wrong:

Select-where (without FROM) and from-where omit essential structure.

“Not similar to SQL” contradicts the design goal of OQL.



Common Pitfalls:

Assuming OQL abandons relational thinking entirely; in practice it blends SQL familiarity with object navigation.



Final Answer:

Similar to SQL and uses a select-from-where structure

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