OSS-DB Silver

OSS-DB Silver Certified Engineers

Engineers capable of designing, developing, implementing and operating a database system 

About OSS-DB Silver

 Certification name OSS-DB Silver 
 Exam name  OSS-DB Exam Silver
Exam version name Version 2.0 ( PostgreSQL 10 and PostgreSQL 11 )
Version 3.0 ( PostgreSQL 12 to PostgreSQL 14)
 *) Until January 31, 2024, you can choose to take the exam of either version. 
Advantage of being certified as OSS-DB Silver

This proves that a certified engineer has the following skills and knowledge.

  • Knowledge of RDBMS and SQL
  • Basic knowledge of open source database
  • Can operate and maintain a small-scale database system using OSS-DB, such as PostgreSQL

  • Can develop a small-scale system using OSS-DB, such as PostgreSQL 

 Prerequisites  Work experience and qualifications are not required to take the exam.


Overview and Information for Taking the Exam

 Duration of learning From two weeks to one month as a general guide
 Exam cost 16,500 yen per exam (in Japan)
150 USD (w/o tax) per exam (outside Japan)
 Number of questions

 50 per exam

 Testing style

Computer based testing (CBT). 

An examinee answers approximately 50 questions

online using a computer.

Most questions are multiple-choice answered by using a mouse; however, some questions require keyboard entry.

There is no hands-on certification test or interview.


 Exam date/place

Select a desired date and location freely

from various parts of the country when you apply for the exam.

The duration of the exam is 90 minutes including a simple questionnaire after the exam.

Contact the following test center for details of exam date and place.




 Taking an exam

Step 1: Register

You must register online to receive an EDUCO identification

number (EDUCO-ID) first.Failure to complete this step

may effect your eligibility for your desired time slot.

Also you must provide your EDUCO-ID to the test centers

when registering for an exam. 

Registration is free of charge and is completed here at the LPI-Japan web site.


> Register for EDUCO-ID 


Step 2: Schedule to Take an Exam

OSS-DB exams are delivered through a number of

different methods; choose one that's most convenient:

You must provide your EDUCO-ID to the test centers when

registering for an exam. If you do not provide your EDUCO-ID, your exam may not get loaded. 

You can register for OSS-DB exams through one of the thousands of Pearson VUE testing centers worldwide.

Once you have located a convenient Pearson VUE center,

you may schedule to take an OSS-DB exam either online or by phone.


> Schedule exam through Pearson VUE


> Locate a Pearson VUE Test Center 


> Schedule exam at a Pearson VUE Center (Online or by Telephone)



 Step 3: Take the Exam

After Passing the Exam

When you pass "OSS-DB Exam Silver", it means you are certified as "OSS-DB Silver".
Certification card
These will be sent to you three weeks after taking the exam.
Certification logo

This logo can only be used on a name card, etc. by the engineers certified as "OSS-DB Silver".
The logo can be downloaded from the following:

Use the following phrase when you indicate the certification with words.

OSS-DB Silver Certified Engineer
Open Source Software Database Professional Certification Silver Certified Engineer


 Active certification status
(Recertification policy)

There is no validity period, but there is an "*) active 

certification status (recertification policy)".

To RETAIN an ACTIVE certification status,

a certification holder is REQUIRED to recertify

within 5 years from the certified date.

Or you need to acquire the OSS-DB Gold certification within five years.


*) About "Recertification Policy"


Once a person is certified by LPI-Japan and receives a

certification designation (OSS-DB Silver, OSS-DB Gold), 

recertification is recommended after two years

from the date of the certification designation to retain a

current certification status. However, to RETAIN an ACTIVE certification status, a certification holder is

REQUIRED to recertify within 5 years of the certification designation.

Recertification requires that the individual candidate

passes all up-to-date exams that are only required for

the highest earned certification designation. 

After successful recertification, the designation status will be updated to ACTIVE for a period of FIVE years.