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|Oracle 1z0-051 Questions & Answers|
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Introduction to the exam
TheOracle 1z0-051 exam is one of the two exams that qualify one for the Oracle Database 11g SQL certification.The certification seeks combine training, experience, and testing to endorse candidates with a strong foundation and expertise in the industry’s most advanced database management system. Oracle database certification targets database admins whose aim is designing, developing, and maintaining SQL applications in the Oracle database.Candidates for this particular exam are required to demonstrate proficiency in concepts of relational databases and the powerful SQL programming language.
Why is this exam needed?
A candidate who obtains the Oracle 1z0-051 certification puts him/herself in the short list for winning Oracle SQL-Based projects. This certification is a valuable, industry-recognized credential that signifies a proven level of knowledge and skill.This certification is primarily good for developer, application developers, PL/SQL developer, forms developer, system analysts, and business analysts and data warehouse administrator.
Associated certifications include: Oracle Database 10g Administrator Certified Associate, Oracle Database 11g Administrator Certified Associate, Oracle PL/SQL Developer Certified Associate, OPN Certified Specialist, and Oracle Database 12c Administrator Certified Associate.
Prerequisites for this exam
In addition to the recommended training course(s), a candidate for this exam should at least have hands-on practice or on-the-job experience performing the tasks described on the exam topics
What skills and knowledge are tested
A candidate for this exam is expected to demonstrate sufficient knowledge in carrying out the following:
- Retrieve row and column data from tables with the SELECT statement
- Create reports of sorted and restricted data
- Display data from multiple tables
- Use DML statements to manage data
- Use DDL statements to manage database objects
The Oracle 1z0-051 exam has the following topics/objectives
- Recover data through the SQL select statement
In this section, the candidate is expected tolist the abilities of SQL select statementsand execute a basic SELECT statement
- Limiting and organizing data
The candidate is expected to limit and classify the rows that recovered by query, in addition to using ampersand substitution for restricting and sorting output at runtime.
- Use ofone row tasks to modify output
Candidates are required to describe the different kinds of types describe various kinds of utilities SQL has andto use date, digit, and charactertasks in SELECT statements.
- Use of transformationtasks and conditional/restricted expressions
In this part, the candidate is required to enumerate the different kinds of conversion tasks that are used in SQL. Further, the candidate should demonstrate knowledge of use of TO_CHAIR, TO_DATE, and TO_NUMBERtransformation tasks, as well as using conditional/restricted expressions in a SELECT statement
- Reportaccumulated data by use of group functions
The candidate classifies the group tasks available and describeshow to use group tasks. The candidate further classifies data by use of GROUP BYphrase, lastly the candidate is required to include/exclude rows by use of ‘HAVING’ clause.
- Display data from various tables
This section involves writing SELECT statements for use inretrieving data from multiple tables, self-joining tables by use of a self-join, viewing data that largelydoesn’t meet a join requirement by use of outer joins and creating a Cartesian result for all rows in multiple tables.
- Using Sub-queries to solve questions
A candidate has to be able to define sub-queries, explain the various issues that the sub-queries can resolve, describe the various sub-queries, and write one-row and multiple-row sub-queries to clear this section.
- Use of the set operatives
This part requires the candidate to explain set operatives, and to use a set operative to turnseveral queries into a one query, and regulate the arrangement of rows reverted
- Manipulate Data
This section entails describing each of the data manipulation language (DML) statements, inserting, updating, and deletingrows into a table, as well as controlling transactions.
- Use of DDL statements to generate and control tables
This section requires the candidate to classify the key database articles, evaluate the table formation, enumerate the data kinds for use in the columns, generate a table, describe how limitations are generated in table creation, and explain operations of schema objects.
- Creation of alternative schema objects
This last section tests ability to implement the previous domain. Specifically, candidates are required to generate basic and compound, recover data in views, generate, manage, and make use of sequences. Lastly, the candidate is required to generate and manage indexes and private as well as public synonyms.
The Oracle 1z0-051 certification is an industry recognized credential, as proof of a person's competence across a spectrum of skills, including understanding SQL programming language. It is also recommended to the entry-level and junior programmers wishing to start and/or continue down the path of using SQL technologies and same time software developers and technical leads wishing to solidify their SQL-related skill sets.