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Ever concept of creating a webservice your app can eat in no time? Then appear no additional as Spring boot offers a simple technique to create stand-by myself, creation-grade Spring based mostly applications perquisite away. The setup is relatively straight ahead regularly needing less time to score it up and working.
Spring integrates a astronomical range of diverse modules in its umbrella, as spring-core, spring-information, spring-net-MVC, e.t.c.¹
The spring internet-MVC leverages on the vitality of Dependency Injection to increase loosely coupled purposes which when executed thoroughly may lead to effectual and effectual purposes
listed here, I’ll demonstrate you the artery to create a RESTful webservice with Spring Boot, Spring facts JPA and the information could subsist endured in a native Oracle database. We’ll install the challenge through the exhaust of here:
· Spring boot starter internet
· Spring boot starter information JPA
· Oracle database 11g express
· Oracle JDBC driver ojdbc.jar
· Java 8
· IntelliJ idea
1. down load Oracle Setup
First down load the oracle 11g express database from oracle.com and installation it in your local laptop. You should register if you don’t believe already got an oracle account earlier than you can download the database. Extract the zip file and rush the setup file. keep the installing steps and conclude well to subsist vigilant your password as you’ll exigency it to configure the facts supply. The default username is “system”.
2. Create a unusual undertaking in Intellij idea
Create a unusual assignment using spring initialzr from IntelliJ and add here dependencies:
spring internet and spring records jpa.
I anticipate you’ve effect in maven, if now not retrograde here to install maven.
3. set up Oracle Driver
The ojdbc.jar offers the integral drivers and setup for oracle database.
so as to add the ojdbc driver to your native repository, down load the ojdbc7.jar file from oracle.com.
reproduction the jar file to any folder, ideally in your C:\ folder.
Run here maven command:
maven deploy ojdbc
For home windows clients, exchange the forward reduce with a backslash.
Add perquisite here dependency to the pom.xml file:
Your project’s pom.xml may soundless seem enjoy this:
four. Create The venture structure
seeing that they are the usage of the MVC architectural pattern which separates the utility into mannequin, view and controller, they exigency to create discrete programs for controllers, entities(or models), daos (information access object), and features. The assignment structure seems enjoy this:
5. Configure Oracle Datasource on IntelliJ thought
On the database device window, add a brand unusual Oracle datasource. download the missing drivers if you’ve no longer carried out so.
input the username(default is “device”) and password in your native oracle db and verify connection.
it will subsist successful totality things being equal. click on ok!.
6. Add software houses
The utility.homes file enables spring to understand the database configuration and profile to exhaust at runtime.
Navigate to your src/main/elements and add the following to the application.residences file.
7. Create the user model
subsequent, we’ll create a consumer class annoted with the JPA @Entity annotation. This class creates a mannequin which JPA uses to set up a relationship/mapping between the person entity and tables within the Oracle relational DB.
Navigate to the entity package and create a brand unusual class known as user and add here:
eight. Add records entry kick (DAO)
subsequent, they create an information entry kick which is an interface that extends JpaRepository interface. The DAO is used to operate CRUD database operations
Navigate to the dao kit and create an interface called UserDao and add here code:
9. carrier Layer
The service class consists of totality strategies that deal with the business logic of the utility. Navigate to the provider kit and create a unusual java class referred to as UserService . For brevity sake, I’ll simplest create a service to add a unusual person and retrieve totality clients.
subsequent, they create the user Controller which holds the entire relaxation endpoints. Navigate to the controller materiel and create a brand unusual category referred to as UserController and add the following:
11. rush application
Now the application is in a position, open terminal on IntelliJ and rush perquisite here maven command:
This creates the user desk in the database the usage of the JPA annotations and the ojdbc configurations in the software.homes file. On the terminal logs, you'll want to too espy sql syntax on how the tables were created.
12. testing on Postman
We’re going to scrutinize at various the relaxation endpoints from the UserController using Postman.
a. Add a unusual consumer
On Postman, that you may operate a post request to create a brand unusual user on the
here they effect up a consumer kick that has a name and salary. here’s a screenshot of the effect up request and the corresponding Json result:
b. Retrieve totality clients
additionally, that you could score totality users on endured on the database by performing a score request on the /person/all endpoint. The pattern score request is shown below:
Voila! in order that’s basically the best artery to set up a webservice the usage of spring boot. Thanks for analyzing.
Don’t neglect to drop your questions, contributions and fein the remark zone below.
This chapter will overview how to swiftly installation an Oracle 11g Database using Oracle VM templates with Oracle VM supervisor.
Oracle VM Templates Overview
Oracle VM Templates are self-contained and pre-configured digital machines with key Oracle technologies. each and every Oracle VM Template is packaged the usage of Oracle most useful practices, which eliminates installing and configuration costs, reduces haphazard and dramatically shortens deployment time. Oracle VM Templates can subsist institute from the Linux Oracle eDelivery portal. There is not any different dealer in the virtualization market that can proffer this even of in-depth talents, integration, administration and pre-packaging of purposes with an operating device.
using Oracle VM Templates for the deployment of applications in Oracle VM guest digital machines eliminates the exigency for a person to install and configure the working materiel or applications. The digital machines created using Oracle VM Templates can too subsist totality started both from the Oracle VM supervisor or the Oracle VM administration Pack (an Oracle commercial enterprise supervisor plug-in).
Oracle VM Templates comprise a free down load and free visitation license with the election to purchase a product license. Oracle VM Templates conclude not believe closing dates or feature limitations, e.g. Oracle VM Templates are full featured and conclude not believe expiration dates. Oracle VM Templates can too subsist promptly transitioned from evaluation into production by artery of purchasing Oracle know-how licenses.
list 1 indicates Oracle’s current Oracle VM templates assortment:
Virtualization and administration * Oracle business supervisor Grid control 10g R5 (10.2.0.5) * Oracle VM manager 2.2 and a pair of.1.5 * Oracle VM Template Builder 2.1 * Oracle VM Server 2.2.1 and a pair of.1.5 SDK * solar Ray utility 5 * Oracle relaxed world DesktopApplications * Siebel CRM SIA eight.1.1 and 8.0 * PeopleSoft CRM 9.1 Bundle #2 with PeopleTools eight.50.09 * PeopleSoft Portal solutions 9.1 and PeopleTools 8.50.09 * PeopleSoft HCM 9.1 and PeopleTools eight.50.02 * JD Edwards EnterpriseOne 9.0 supplant 1 with ESUs and JD Edwards EnterpriseOne materiel 8.ninety eight supplant 3 * JD Edwards EnterpriseOne 9.0 supplant 1 and JD Edwards EnterpriseOneTools 8.ninety eight update 2 * E-enterprise Suite 12.1.1Middleware * Oracle WebLogic Server 10g unlock 3 * Oracle company Intelligence business version 10.1.3.four * Oracle application Server 10g unencumber three WebCenter * Oracle id administration 10g liberate 2 * Oracle Fusion Middleware service Oriented structure (SOA) 10.1.3.four and 10.1.three.3Database & precise software Clusters (RAC) * Oracle loyal utility Clusters (RAC) 11g unencumber 2 * Oracle actual software Clusters (RAC) 11g unencumber 1 * Oracle Database 11g and Oracle Database 10g free up 2Operating system * Oracle commercial enterprise Linux four and 5 * Oracle Solaris 10
3rd party application * Zeus traffic manager
Oracle VM utility Deployment options
Oracle presents three wonderful alternate options for accelerating application deployment: . Oracle VM Templates, Oracle virtual assembly Builder and Oracle VM Template Builder.
Oracle VM Templates – download from Oracle and set up
Oracle virtual meeting Builder – package software accessories into virtual home equipment
Oracle VM Template Builder – conclude it your self appliance templating
This chapter covers deploying the Oracle 11g Database using Oracle VM Templates.
a artery to score Oracle VM Templates
To study the complete article at its source, delight consult with Chapter eight: a artery to Virtualize the Oracle Database 11g with Oracle VM
constructing on its commitment to providing hardware and utility engineered to drudgery collectively to optimize performance and effectivity, Oracle today announced a brand unusual world list non-clustered TPC-H 3TB benchmark effect demonstrating the superior scalability of Oracle® Database 11g unlock 2 working on Oracle's SPARC enterprise M9000 server(1).
This outcome sets a unusual list supplying well-nigh 2 times greater performance than the ragged most dependable score(2), already owned through Oracle.
Oracle's SPARC enterprise M9000 server, portion of the SPARC enterprise Server household, is Oracle's optimum performance business server.
running on a SPARC commercial enterprise M9000 server, outfitted with sixty four SPARC64 VII+ three.0 GHz processors, and sun Storage 6180 arrays, Oracle Database 11g release 2 with Oracle Solaris accomplished an international list TPC-H 3 TB non-clustered efficiency result of 386,478 QphH@3000GB with a value of $19.25/QphH@3000GB.
This result demonstrates that Oracle Database 11g unencumber 2 running on the SPARC commercial enterprise M9000 server become 2.four instances faster than the IBM energy 595 gadget(three) and loaded the all database 3.three instances faster than the above device whereas protecting the optimum degree of statistics coverage at a reduce permeate per transaction(3).
The benchmark underscores the means of SPARC enterprise M-series servers to convey near-linear scalability and deal with the increasingly large databases required of determination advocate and records warehousing programs. Neither IBM nor HP matched this stage of efficiency in the 3TB scale ingredient category using a unique gadget, extra highlighting the performance capabilities of multi-processor SPARC systems in the most demanding commercial enterprise application environments.
"This outcome demonstrates the stunning performance and scalability of the SPARC commercial enterprise M9000 platform," stated Juan Loaiza, senior vp, methods know-how, Oracle. "ordinary, Oracle has delivered a surprising portfolio of benchmark consequences showcasing their endured efforts to create an industry generic for performance, scalability and cost/efficiency."
About Oracle Oracle (NASDAQ:ORCL - information) is the realm's most complete, open, and built-in business software and hardware techniques company. For extra recommendation about Oracle, delight talk over with their internet website at http://www.oracle.com.trademarks Oracle and Java are registered emblems of Oracle and/or its affiliates. other names may well subsist trademarks of their respective house owners.source: Transaction Processing performance Council (TPC) www.tpc.orgAs of March 22, 2011:(1) sun SPARC enterprise M9000 server (sixty four CPUs): 386,478 QphH@3000GB, $19.25/QphH@3000GB, accessible March 22. Oracle used Storage Redundancy degree three (highest) as defined via the TPC-H 2.14.0 specification. Database Load Time - 10,741 sec.(2) sun SPARC commercial enterprise M9000 server (32 CPUs): 198,907.5 QphH@3000GB, $sixteen.fifty eight/QphH@3000GB, accessible 04/05/2011. 32 vs 64 CPUs outcomes exhibit 1.94x scalabilty.(three) IBM vitality 595 model 9119-FHA, 156,537.3 QphH@3000GB, $20.60/QphH@3000GB, available eleven/24/2009. (greatest IBM TPC-H 3000GB performance (QphH) and cost/performance ($/QphH) result). Database Load Time - 36,145 sec. 36,one hundred forty five/10,741 = three.365
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So, should you want to subsist Oracle Certified? It’s been a debatable issue for a while, but one thing is sure: the Oracle Certification gives an accurate measure of your technical expertise. Additionally, it gives you an edge over people competing for the database administration positions you desire.
Here is the path to getting an Oracle Database certification:
The first scoot to getting your Oracle is acquiring the Associate Certification, which requires that the person clear two tests to become an Oracle Certified Associate (OCA). With this qualification, you can drudgery in junior database management as a team member or an application developer. To score the associate certification, you believe to pass in one of the three tests explained below and the final “Oracle Database 11g: Administration I” exam.
Take one of the following three courses
Oracle Database 12c: SQL Fundamentals (1Z0–061)
The exam tests information to create, recover, maintain and edit data in a database. Mainly, this involves a clutch of crucial database administration concepts such as the relational database. Additionally, the exigency to understand and exhaust SQL is significant, as the test will require you to demonstrate your SQL programming skills.
Oracle Database SQL (1Z0–071)
In general, this is a superior version of the Oracle 1Z0–047 exam. You will exigency skill in 53 topics to score in this exam. You exigency to believe a higher information of schema objects, Control transactions, and manipulate data using subqueries. The questions require the abysmal understanding of SQL, and are multiple parts in nature, requiring an application of concepts rather than minor memorization of answers. undergo in database administration will give you a notable odds in this exam.
Oracle Database 11g: SQL Fundamentals I (1Z0–051)
This test is an upgraded version of the “Introduction to Oracle9i SQL” test. The content is more recent and covers set and conditional operators, which are absent in the older version. Therefore, you would subsist better off choosing this test over the former.
Oracle Database 11g: Administration I (1Z0–052)
The exam needs information on how to set up database environments and protected Oracle situations in any network environment. Other concepts required to pass this exam comprise the understanding of database backup and recovery, Oracle Database Architecture, as well as the configuration of security occurrences. The questions exigency application of concepts, not just memorization of information.
The professional certification concedes you to manage large databases and develop large-scale database applications. In summary, to become an Oracle Certified Professional (OCP), you believe to prefer an instructor-led course, an exam and a hands-on course.
Be an Oracle Certified Associate
You must exigency the OCA certification as a pre-requisite for this certification.
Take an Exam
The second trail in the OCP certification process is to prefer a course from a election of around 50 certifications and sit an exam. The listing of these courses is accessible on the Oracle site. The broad selection means that you can choose the path that best suits your training requirements. Note that you cannot meet the needs of this course through self-study; you believe to prefer an instructor-led class, a virtual class or learn through training-on-demand.
Submission of an Already Completed Certification
In this step, you are expected to submit a previously completed course from a list of 21 Certifications. Alternatively, Oracle allows submissions from courses taken in the previous step.
Oracle Database 11g: Administration II (1Z0–053)
This is the final exam in the OCP certification process. Once you pass this exam, you can promote to the final process.
Submit a course completion form
Once you clear this exam, you just believe to complete a course submission as the final step in the OCP certification process.
This is the highest-level Oracle certification you can get. With this qualification, you will well-suited to drudgery in senior-levels in IT departments managing sensitive database system problems and applications. You will require an OCP certification to score started. After that, you will trap a two-day exam and then a hands-on course.
Obtain an OCP Certification
The Oracle Certified Master (OCM) needs you first to score the OCP certification.
Complete two advanced courses
The next step in master certification is the completion of two courses from a list of over 30 certifications. Some of these certifications may correspond with those allowed in the OCP certification process. Nevertheless, those managed to score the OCP certification cannot subsist used through this step to meet the OCM requirements. Additionally, as with the OCP certification courses, you believe to prefer these courses in class, through the virtual level, or by training on demand.
Submit a Completed Certification
This even is too much enjoy its OCP equal in that you can submit an archived certification from a list of almost 20 certifications given or a course from the list provided in the previous step.
This is the final exam in the master certification process. Passing this exam completes the learning necessities for the entire Oracle certification process. However, there are a few lesser steps required to score the OCM certification.
Fill a Certification Submission Form
You believe to submit this configuration to corroborate that you believe completed totality the certifications required to score the Oracle Certified Master qualification.
Submission of a Fulfilment Kit Request
This configuration is too presented in addition to the course submission configuration and is the final requirement for the Master Certification process.
At The End:
In common, Oracle Certified database administrators believe the know-how to rush databases both at the junior and senior-levels, depending on the certification level. Some people might title that there is minute point to staying certified, as the process includes the memorization of abstract concepts and taking a multiple election test. However, while there is aplomb in the fact that certification does minute to compensate for the want of technical competence obtained through experience, it does give validity to such claims. As an Oracle Certified database administrator, potential employers and clients are more easily convinced of your capabilities in the field.
Need befriend preparing for your next Oracle certification exam? This is the third in their string of six Oracle certification quizzes, courtesy of Oracle expert Matthew Morris.
SQL, or Structured Query Language, is essential for managing data in a relational database management system (RDBMS). Oracle has been the leading player in the RDBMS game for quite a while now, and while you may occasionally hear opinions to the contrary, that position of preeminence is likely to remain secure in the foreseeable future.
Oracle certification expert Matthew Morris has created a string of practice tests at his site, Oracle Certification Prep. These free practice questions are a sampling of what you'll find there. After you try these questions, visit Oracle Certification Prep for (paid) access to a full 1Z0-051: Oracle Database 11g: SQL Fundamentals I practice test.
Ready to rumble? Simply scroll down the page to initiate your quiz. Or check out their other free Oracle quizzes.
Note: Your browser must permit multiple dialog boxes per page in order to complete this quiz.
Which of the following statements about single-row functions is correct?
OCA Oracle Database 11g: SQL Fundamentals I Exam GuideChapter 8: Using Subqueries to decipher Problems
A subquery is a query that is nested inside a SELECT, INSERT, UPDATE, or DELETE statement or inside another subquery. This chapter from OCA Oracle Database 11g: SQL Fundamentals I Exam steer explains the places in a query where a subquery may subsist used and which clauses are optional and required. Read the chapter to better understand the subquery definition.
OCA Oracle Database 11g: SQL Fundamentals I Exam Guide, Chapter 8
Table of contents:
Define SQL subqueriesUsing subqueries in SQLList the types of SQL subqueriesWriting single-row and multiple-row subqueries
This chapter is the first of two that prove how two or more SELECT commands can subsist combined into one statement. The first technique (covered in this chapter) is the exhaust of subqueries. A subquery is a SELECT statement whose output is used as input to another SELECT statement (or indeed to a DML statement, as done in Chapter 10). The second technique is the exhaust of set operators, where the results of several SELECT commands are combined into a unique result set.
Define SQL subqueries
A subquery is a query that is nested inside a SELECT, INSERT, UPDATE, or DELETE statement or inside another subquery. A subquery can recrudesce a set of rows or just one row to its parent query. A scalar subquery is a query that returns exactly one value: a unique row, with a unique column. Scalar subqueries can subsist used in most places in a SQL statement where you could exhaust an expression or a literal value.
The places in a query where a subquery may subsist used are as follows:
In the SELECT list used for column projection
In the FROM clause
In the WHERE clause
In the HAVING clause
A subquery is often referred to as an inner query, and the statement within which it occurs is then called the outer query. There is nothing wrong with this terminology, except that it may imply that you can only believe two levels, inner and outer. In fact, the Oracle implementation of subqueries does not impose any practical limits on the even of nesting: the depth of nesting permitted in the FROM clause of a statement is unlimited, and that in the WHERE clause is up to 255.
A subquery can believe any of the usual clauses for selection and projection. The following are required clauses:
A SELECT list
A FROM clause
The following are optional clauses:
The subquery (or subqueries) within a statement must subsist executed before the parent query that calls it, in order that the results of the subquery can subsist passed to the parent.
EXERCISE 8-1 Types of Subqueries
In this exercise, you will write code that demonstrates the places where subqueries can subsist used. exhaust either SQL*Plus or SQL Developer. totality the queries should subsist rush when connected to the HR schema.
Log on to your database as user HR.
Write a query that uses subqueries in the column projection list. The query will report on the current numbers of departments and staff:
select sysdate Today,
(select count(*) from departments) Dept_count,
(select count(*) from employees) Emp_count
Write a query to identify totality the employees who are managers. This will require using a subquery in the WHERE clause to select totality the employees whose EMPLOYEE_ID appears as a MANAGER_ID:
select last_name from employees where
(employee_id in (select manager_id from employees));
ch08.indd 359 4/28/08 10:48:49 AM
Write a query to identify the highest salary paid in each country. This will require using a subquery in the FROM clause:
select max(salary),country_id from
(select salary,department_id,location_id,country_id from
employees natural link departments natural link locations)
group by country_id;
Download the chapter "Using Subqueries to decipher Problems", which includes practice exercises and a self-test, in PDF form.
Continue to the next section: Using subqueries in SQL
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Computer Security: Principles and Practice By William Stallings, Lawrie Brown Publisher : Pearson (Aug 2017) ISBN10 : 0134794109 ISBN13 : 9780134794105 Our ISBN10 : 1292220619 Our ISBN13 : 9781292220611 Subject : Computer Science & Technology
Urban Economics By Arthur O’Sullivan Publisher : McGraw-Hill (Jan 2018) ISBN10 : 126046542X ISBN13 : 9781260465426 Our ISBN10 : 1260084493 Our ISBN13 : 9781260084498 Subject : Business & Economics
Urban Economics By Arthur O’Sullivan Publisher : McGraw-Hill (Jan 2018) ISBN10 : 0078021782 ISBN13 : 9780078021787 Our ISBN10 : 1260084493 Our ISBN13 : 9781260084498 Subject : Business & Economics
Understanding Business By William G Nickels, James McHugh, Susan McHugh Publisher : McGraw-Hill (Feb 2018) ISBN10 : 126021110X ISBN13 : 9781260211108 Our ISBN10 : 126009233X Our ISBN13 : 9781260092332 Subject : Business & Economics
Understanding Business By William Nickels, James McHugh, Susan McHugh Publisher : McGraw-Hill (May 2018) ISBN10 : 1260682137 ISBN13 : 9781260682137 Our ISBN10 : 126009233X Our ISBN13 : 9781260092332 Subject : Business & Economics
Understanding Business By William Nickels, James McHugh, Susan McHugh Publisher : McGraw-Hill (Jan 2018) ISBN10 : 1260277143 ISBN13 : 9781260277142 Our ISBN10 : 126009233X Our ISBN13 : 9781260092332 Subject : Business & Economics
Understanding Business By William Nickels, James McHugh, Susan McHugh Publisher : McGraw-Hill (Jan 2018) ISBN10 : 1259929434 ISBN13 : 9781259929434 Our ISBN10 : 126009233X Our ISBN13 : 9781260092332 Subject : Business & Economics
1Z0-051 By Peter W. Cardon Publisher : McGraw-Hill (Jan 2017) ISBN10 : 1260128474 ISBN13 : 9781260128475 Our ISBN10 : 1259921883 Our ISBN13 : 9781259921889 Subject : Business & Economics, Communication & Media
1Z0-051 By Peter Cardon Publisher : McGraw-Hill (Feb 2017) ISBN10 : 1260147150 ISBN13 : 9781260147155 Our ISBN10 : 1259921883 Our ISBN13 : 9781259921889 Subject : Business & Economics, Communication & Media