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ABN 26621887572

Certifications/Oracle/Oracle 1Z0-071
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 233 practice questions, seven structured chapters, and a 120-minute exam format with a 63% passing score.

Start PracticeBrowse Learning Path
73
Questions per exam
233
Question bank total
120m
Exam Duration
63/100
Passing Score
$245
Exam Fee

At a glance

233 questions
Best forDatabase administrators who want stronger Oracle SQL skills, Oracle developers working with queries and schema objects
Prep pace4-6 weeks with experience
Course pack7 chapters · 60 hours
Learner signal0 enrolled · 0/5
Exam Guide
✓
Bottom line · Worth it

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。

What this certification covers

This page is structured for quick scanning first: exam format, fit, prep time, and the actual study scope.

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。

You will work with

Oracle 技术数据库管理系统架构性能优化故障排除

After preparation

  • 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

Exam details

Exam Code
1Z0-071
Provider
Oracle
Duration
120 minutes
Question Count
73 questions
Passing Score
63/100
Validity
0 years
Exam Fee
$245 USD
Question Types
Single choice, Multiple select
Languages
English, 日本語
Official Page
Open AWS page

Who should take it

Good fit

  • 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

Is it worth it? Career value

Salary ranges, target job titles, and the real career impact of holding Oracle 1Z0-071.

澳洲
$85K-130KAUD
美国
$80K-125KUSD
中国
¥180K-350KCNY
Oracle DBADatabase DeveloperPL/SQL Developer数据库管理员Oracle ERP 技术顾问Data Engineer

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。

Study preparation

With hands-on AWS

4-6 weeks

From scratch

8-12 weeks

Daily pace

1-2 hours/day

Learning path preview

7 chapters
1
1Z0-071 Exam Overview and Study Plan
30 min
2
Relational Database and SQL Basics
60 min
3
Single-Row Functions and Data Conversion
70 min
4
Table Joins and Subqueries
80 min
5
DML Data Manipulation and DDL Object Management
90 min
6
Set Operators, Views, and the Data Dictionary
100 min
+ 1 more chapters inside the full path

Step-by-step preparation

A concrete week-by-week plan from past test-takers — not generic advice.

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）。

Real test-taker experiences

What it actually took for real candidates to pass — prep time, scores, and lessons learned.

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. Zhang78%
Oracle DBA 2 年 · 5 weeks prep

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65%
零基础转数据方向 · 11 weeks prep

Certification comparison

Oracle 1Z0-071Oracle 1Z0-082Oracle 1Z0-809
ProviderOracleOracleOracle
Level助理级助理级专业级
Fee$245$245$245
Duration120 min120 min150 min
Questions per exam736885
Validity0 yrs0 yrs0 yrs

Study tips and common mistakes

💡

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。

⚠️

**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。

Frequently Asked Questions

If you plan to take Oracle 1Z0-071, start with real practice.

233 questions, chapter-by-chapter learning, mock exams, wrong-question review, and AI tutor support live in the exam page.

Go to exam prep

From $29 · 2 free chapters

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EXAM PREP

Oracle 1Z0-071 Question Bank

Chapter-by-chapter learning + mock exams + AI tutor

233
Questions
7
Chapters
60h
Study
AI
Tutor
  • First 2 chapters free
  • Real exam format mock tests
  • AI-powered wrong answer review
  • Chapter progress tracking
From $29
Start Practice Now

Prep snapshot

Study chapters7
Practice questions233
Estimated hours60h

What is inside

  • 7 structured chapters that follow the exam areas
  • 233 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