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CertificationsOracle1Z0-071
Oracle助理级数据库

Oracle Database SQL (1Z0-071)

Oracle Database SQL exam prep covering SELECT queries, joins, subqueries, DML, DDL, views, and data dictionary basics. Includes 159 practice questions, seven structured chapters, and a 120-minute exam format with a 63% passing score.

Try the first chapter freePractice questions
73
Official exam questions
120 min
Exam duration
63/100
Passing score
JR ACADEMY / CERTIFICATION PREP

JR Academy practice bank

159practice questions
Build your foundation7 learning chapters
Practice with purposeFocused practice · answer explanations
Test your readinessMock exams · review

159 practice questions available

OverviewLearning pathFAQReviews
01

Understand the certification

Oracle SQL 岗位的硬性门槛 — 银行、电信、政府系统的 Oracle DBA/开发 JD 里,1Z0-071 是出现频率最高的认证要求。

Oracle Database SQL (1Z0-071) 是 Oracle 数据库认证路径的第一站,也是获取 Oracle Certified Associate (OCA) 和后续 OCP 的必经之路。考试 73 题 / 120 分钟,及格线 63%(约 46 题),费用 $245 USD。覆盖 SELECT 查询、JOIN(Inner/Outer/Cross/Self)、子查询(标量/内联视图/关联子查询)、DML 操作、DDL 操作、约束管理六大核心领域。

Oracle SQL 和 MySQL/PostgreSQL 的关键差异在考试中高频出现:Oracle 没有 LIMIT 关键字,用 FETCH FIRST N ROWS ONLY(12c+)或 ROWNUM 伪列;NVL/NVL2/DECODE 是 Oracle 特有函数,不是标准 SQL 的 COALESCE/CASE;Oracle 的 VARCHAR2 和标准 VARCHAR 行为不同(空字符串 = NULL)。

截至 2025 年,Oracle 数据库在全球 RDBMS 市场份额约 30%(DB-Engines 排名持续第一)。Gartner 2024 年云数据库报告中 Oracle 仍是唯一在 on-prem 和 cloud(OCI Autonomous Database)都排前三的厂商。金融、政府、电信这三个行业的核心系统大量依赖 Oracle,短期内不会迁移。

Exam at a glance

Exam code
1Z0-071
Provider
Oracle
Format
Single choice / Multiple select
Language
English / 日本語
Validity
No expiry
Exam fee
$245
Official certification page

Skills in focus

Oracle 技术数据库管理系统架构性能优化故障排除

Learning outcomes

  • Earn the Oracle Database SQL certification
  • Write and read Oracle SQL with more confidence
  • Handle joins, subqueries, and data manipulation tasks in real work
  • Build a foundation for Oracle administration or developer tracks

Who this is for

  • Database administrators who want stronger Oracle SQL skills
  • Oracle developers working with queries and schema objects
  • IT professionals preparing for an Oracle SQL certification
  • Cloud and operations engineers who need to read and write SQL confidently

Before you start

  • Basic knowledge of databases is helpful
  • You should be comfortable reading simple SQL statements
  • No advanced Oracle background is required to start
02

Your learning path

7 chapters

011Z0-071 Exam Overview and Study PlanFree02Relational Database and SQL BasicsFree03Single-Row Functions and Data Conversion70 min04Table Joins and Subqueries80 min05DML Data Manipulation and DDL Object Management90 min06Set Operators, Views, and the Data Dictionary100 min
View the full learning path

Plan your preparation

Learning hours
60h
With relevant experience
4-6 weeks
Starting from scratch
8-12 weeks
Daily study
1-2h

Included in your preparation

  • 7 structured chapters that follow the exam areas
  • 159 practice questions with explanations
  • Mock exam practice built around the 73-question, 120-minute format
  • Coverage of joins, subqueries, functions, DML, DDL, views, and dictionary queries
  • Practical SQL examples rather than memorisation-only drills

1. 第一阶段:Oracle SQL 语法速查(1-2 周)

装好 Oracle XE(免费版)或用 Oracle Live SQL(在线环境),从 HR schema 的示例数据开始练。重点掌握 SELECT + WHERE + ORDER BY、GROUP BY + HAVING、各种 JOIN 语法。每天写 10-15 条查询,确保能不查文档写出多表 JOIN。

2. 第二阶段:子查询和集合操作(2-3 周)

关联子查询(Correlated Subquery)是最大难点 — 理解内层查询引用外层表的执行逻辑。练习 IN/EXISTS/NOT EXISTS 的等价转换。集合操作 UNION/UNION ALL/INTERSECT/MINUS 的排序规则和数据类型匹配要求是高频考点。

3. 第三阶段:DDL + 约束 + 数据类型(1-2 周)

CREATE TABLE 的约束语法(PRIMARY KEY/FOREIGN KEY/CHECK/UNIQUE/NOT NULL)、ALTER TABLE 操作限制、Oracle 特有数据类型(VARCHAR2/NUMBER/DATE/TIMESTAMP/INTERVAL)的隐式转换规则。DATE 和 TIMESTAMP 的区别、TO_DATE/TO_CHAR 格式掩码是必考点。

4. 第四阶段:模考冲刺(1-2 周)

用 Oracle 官方 Practice Exam + Enthuware 1Z0-071 题库做模考。目标稳定在 75% 以上再约考。重点复习 NVL/NVL2/DECODE/CASE 的区别、ROWNUM 陷阱(WHERE ROWNUM > 5 永远返回空)、GROUP BY 扩展(ROLLUP/CUBE/GROUPING SETS)。

03

Career value

Oracle DBA/Developer 在澳洲的需求集中在金融(CBA、ANZ、Westpac 的核心银行系统)和政府部门(Service NSW、ATO)。Seek 上搜 "Oracle DBA" 澳洲市场年薪中位数约 $110K AUD(2025 数据),有 OCP 认证的高级 DBA 可到 $150K+。

1Z0-071 本身是 Associate 级别,含金量在于它是 OCP 的前置条件。单独持有 1Z0-071 在简历上的效果是"证明你会写 Oracle SQL",不足以独立支撑求职。建议拿到 1Z0-071 后立即准备 1Z0-082(Database Administration)或 1Z0-149(PL/SQL)走完 OCP 路径。

不适合的人群:目标是做 PostgreSQL/MySQL 方向的开发者 — Oracle SQL 语法差异大,考这张证投入产出比低。纯做数据分析(Python + SQL)的人也不需要 Oracle 认证,用标准 SQL 足够。

Oracle DBADatabase DeveloperPL/SQL Developer数据库管理员Oracle ERP 技术顾问Data Engineer
澳洲
AUD 85,000 – 130,000
美国
USD 80,000 – 125,000
中国
CNY 180,000 – 350,000

Preparation tips

  • 73 题 120 分钟,平均 1.6 分钟/题,时间充裕但子查询题可能需要 3-4 分钟手工推演。
  • 不确定的题用排除法 — Oracle SQL 题经常有语法错误的选项,先排掉。
  • DATE 算术题记住:DATE + NUMBER = DATE(天数加减),DATE - DATE = NUMBER(天数差),MONTHS_BETWEEN 返回精确月数。

Common mistakes

  • **ROWNUM 陷阱** — `WHERE ROWNUM > 5` 永远返回零行,因为第一行 ROWNUM=1 就不满足条件,后续行永远拿不到 ROWNUM。正确写法用子查询包一层再过滤。
  • **空字符串等于 NULL** — Oracle 里 `''` 就是 NULL,`LENGTH('')` 返回 NULL 不是 0。这和 PostgreSQL/MySQL 完全不同,至少考 2-3 题。
  • **GROUP BY 位置引用** — Oracle 的 GROUP BY 不支持列别名引用(SELECT name AS n ... GROUP BY n 会报错),必须写原始列名或表达式。
04

Before you register

How difficult is the 1Z0-071 exam?

The 1Z0-071 exam contains approximately 73 questions with a 120-minute time limit, requiring a passing score of 63%. We recommend systematic study combined with extensive practice questions to prepare.

What is the exam fee and validity period?

The 1Z0-071 exam fee is $245 USD. Oracle certifications typically do not have a fixed expiration date, but it is recommended to stay current with the latest technologies.

How do I register for the exam?

You can register through the Oracle University website or a Pearson VUE testing center. Both online proctored and in-person testing center options are available.

05

Learner experiences

Loading reviews…

工作中天天写 Oracle SQL 但还是花了 5 周准备。最坑的是 DECODE 函数的 NULL 处理逻辑 — DECODE(NULL, NULL, 1, 0) 返回 1,因为 DECODE 把 NULL = NULL 视为 TRUE,这和标准 SQL 完全相反。考了 3 道类似的题。

L. Zhang

Oracle DBA 2 年 · 78% · 5 weeks

险过。子查询和 JOIN 的组合题最难,一道题套三层嵌套。建议零基础先在 Oracle Live SQL 上跑完官方 tutorial 再碰题库,不然题目都看不懂。

转行者,前会计

零基础转数据方向 · 65% · 11 weeks

06

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Start with the first chapter.

2 free chapters · Full preparation from $29

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