EDUCBA

EDUCBA

MENUMENU
  • Free Tutorials
  • Free Courses
  • Certification Courses
  • 360+ Courses All in One Bundle
  • Login
Home Data Science Data Science Tutorials PostgreSQL Tutorial PostgreSQL OID
Secondary Sidebar
PostgreSQL Tutorial
  • Basic
    • What is PostgreSQL
    • PostgreSQL Features
    • How to Install PostgreSQL
    • PostgreSQL Versions
    • PostgreSQL Architecture
    • PostgreSQL GUI
    • Postgres Command-Line
    • PostgreSQL Variables
    • PostgreSQL Data Types
    • PostgreSQL NOT NULL
    • PostgreSQL Integer
    • PostgreSQL Boolean
    • PostgreSQL BIGINT
    • PostgreSQL NULLIF
    • PostgreSQL Administration
    • PostgreSQL Commands
    • PostgreSQL Operators
    • PostgreSQL IN Operator
    • Postgres like query
    • PostgreSQL encode
    • PostgreSQL Cheat Sheet
    • PostgreSQL List Databases
    • PostgreSQL Rename Database
  • Control Statement
    • PostgreSQL IF Statement
    • PostgreSQL if else
    • PostgreSQL CASE Statement
    • PostgreSQL LOOP
    • PostgreSQL For Loop
    • PostgreSQL While Loop
  • Joins
    • Joins in PostgreSQL
    • PostgreSQL Inner Join
    • PostgreSQL Outer Join
    • LEFT OUTER JOIN in PostgreSQL
    • PostgreSQL FULL OUTER JOIN
    • PostgreSQL LEFT JOIN
    • PostgreSQL Full Join
    • PostgreSQL Cross Join
    • PostgreSQL NATURAL JOIN
    • PostgreSQL UPDATE JOIN
  • Queries
    • PostgreSQL Queries
    • PostgreSQL INSERT INTO
    • PostgreSQL WHERE Clause
    • PostgreSQL WITH Clause
    • PostgreSQL ORDER BY
    • PostgreSQL ORDER BY Random
    • PostgreSQL ORDER BY DESC
    • PostgreSQL GROUP BY
    • PostgreSQL group_concat
    • PostgreSQL HAVING
    • PostgreSQL Recursive Query
  • Advanced
    • PostgreSQL Schema
    • Postgres List Schemas
    • PostgreSQL Drop Schema
    • PostgreSQL VARCHAR
    • Array in PostgreSQL
    • PostgreSQL DDL
    • PostgreSQL List Users
    • Postgres Default User
    • Postgres add user
    • PostgreSQL User Password
    • PostgreSQL log_statement
    • PostgreSQL repository
    • PostgreSQL shared_buffer
    • PostgreSQL String Functions
    • PostgreSQL Compare Strings
    • PostgreSQL Text Search
    • PostgreSQL TEXT
    • PostgreSQL String Array
    • PostgreSQL where in array
    • PostgreSQL Constraints
    • PostgreSQL UNIQUE Constraint
    • PostgreSQL CHECK Constraint
    • PostgreSQL INTERSECT
    • PostgreSQL Like
    • Cursors in PostgreSQL
    • PostgreSQL UNION ALL
    • Indexes in PostgreSQL
    • PostgreSQL Index Types
    • PostgreSQL REINDEX
    • PostgreSQL UNIQUE Index
    • PostgreSQL Clustered Index
    • PostgreSQL DROP INDEX
    • PostgreSQL DISTINCT
    • PostgreSQL FETCH
    • PostgreSQL RAISE EXCEPTION
    • PostgreSQL Auto Increment
    • Sequence in PostgreSQL
    • Wildcards in PostgreSQL
    • PostgreSQL Subquery
    • PostgreSQL Alias
    • PostgreSQL LIMIT
    • PostgreSQL Limit Offset
    • PostgreSQL LAG()
    • PostgreSQL Table
    • Postgres Show Tables
    • PostgreSQL Describe Table
    • PostgreSQL Lock Table
    • PostgreSQL ALTER TABLE
    • Postgres Rename Table
    • PostgreSQL List Tables
    • PostgreSQL TRUNCATE TABLE
    • PostgreSQL Table Partitioning
    • Postgres DROP Table
    • PostgreSQL Functions
    • PostgreSQL Math Functions
    • PostgreSQL Window Functions
    • Aggregate Functions in PostgreSQL
    • PostgreSQL Primary Key
    • Foreign Key in PostgreSQL
    • PostgreSQL Procedures
    • PostgreSQL Stored Procedures
    • PostgreSQL Views
    • PostgreSQL Materialized Views
    • Postgres Create View
    • PostgreSQL Triggers
    • PostgreSQL DROP TRIGGER
    • PostgreSQL Date Functions
    • PostgreSQL TO_DATE()
    • PostgreSQL datediff
    • PostgreSQL Timestamp
    • PostgreSQL CURRENT_TIMESTAMP()
    • PostgreSQL Notify
    • PostgreSQL LENGTH()
    • PostgreSQL blob
    • PostgreSQL Median
    • PostgreSQL kill query
    • PostgreSQL Formatter
    • PostgreSQL RANK()
    • PostgreSQL Select
    • PostgreSQL Average
    • PostgreSQL DATE_PART()
    • PostgreSQL EXECUTE
    • PostgreSQL COALESCE
    • PostgreSQL EXTRACT()
    • PostgreSQL Sort
    • PostgreSQL TO_CHAR
    • PostgreSQL Interval
    • PostgreSQL Number Types
    • PostgreSQL ROW_NUMBER
    • Alter Column in PostgreSQL
    • PostgreSQL Identity Column
    • PostgreSQL SPLIT_PART()
    • PostgreSQL CONCAT()
    • PostgreSQL replace
    • PostgreSQL TRIM()
    • PostgreSQL MAX
    • PostgreSQL DELETE
    • PostgreSQL Float
    • PostgreSQL OID
    • PostgreSQL log
    • PostgreSQL REGEXP_MATCHES()
    • PostgreSQL MD5 
    • PostgreSQL NOW()
    • PostgreSQL RANDOM
    • PostgreSQL round
    • PostgreSQL Trunc()
    • PostgreSQL TIME
    • PostgreSQL IS NULL
    • PostgreSQL CURRENT_TIME
    • PostgreSQL MOD()
    • Postgresql Count
    • PostgreSQL Datetime
    • PostgreSQL MIN()
    • PostgreSQL age()
    • PostgreSQL enum
    • PostgreSQL OR
    • PostgreSQL Wal
    • PostgreSQL NOT IN
    • PostgreSQL SET
    • PostgreSQL Current Date
    • PostgreSQL Compare Date
    • PostgreSQL SERIAL
    • PostgreSQL UUID
    • PostgreSQL Merge
    • PostgreSQL Database
    • PostgreSQL Clone Database
    • PostgreSQL Copy Database
    • PostgreSQL Show Databases
    • PostgreSQL Restore Database
    • PostgreSQL DROP DATABASE
    • PostgreSQL ALTER DATABASE
    • Postgres DROP Database
    • Postgres Dump Database
    • PostgreSQL OFFSET
    • PostgreSQL GRANT
    • PostgreSQL COMMIT
    • PostgreSQL ROLLUP
    • PostgreSQL JSON
    • EXPLAIN ANALYZE in PostgreSQL
    • PostgreSQL Temporary Table
    • PostgreSQL Show Tables
    • PostgreSQL cluster
    • PostgreSQL Replication
    • PostgreSQL Logical Replication
    • PostgreSQL flush privileges
    • PostgreSQL Tablespaces
    • CAST in PostgreSQL
    • PostgreSQL CTE
    • hstore in PostgreSQL
    • PostgreSQL Encryption
    • PostgreSQL DECODE()
    • PostgreSQL Vacuum
    • PostgreSQL EXCLUDE
    • Postgres Change Password
    • Postgres Delete Cascade
    • PostgreSQL EXCEPT
    • PostgreSQL Roles
    • PostgreSQL Link
    • PostgreSQL Partition
    • PostgreSQL column does not exist
    • PostgreSQL Log Queries
    • PostgreSQL escape single quote
    • PostgreSQL Query Optimization
    • PostgreSQL Character Varying
    • PostgreSQL Transaction
    • PostgreSQL Extensions
    • PostgreSQL Import CSV
    • PostgreSQL Client
    • PostgreSQL caching
    • PostgreSQL Incremental Backup
    • PostgreSQL JSON vs JSONNB
    • PostgreSQL JDBC Driver
    • PostgreSQL Interview Questions

PostgreSQL OID

By Priya PedamkarPriya Pedamkar

PostgreSQL OID

Introduction to PostgreSQL OID

PostgreSQL OID is defined as a 32-bit positive number, every row in the PostgreSQL database will contain the object identifier. By default in PostgreSQL, the OID column is hidden, we can see the row OID by specifying column name as OID in the table selection operation. OID is very useful and important in PostgreSQL to define the unique value of a row because every row contains its specific OID. We can neglect the OID from the table by using the clause without OID.

Syntax

Given below is the syntax mentioned:

Start Your Free Data Science Course

Hadoop, Data Science, Statistics & others

All in One Data Science Bundle(360+ Courses, 50+ projects)
Python TutorialMachine LearningAWSArtificial Intelligence
TableauR ProgrammingPowerBIDeep Learning
Price
View Courses
360+ Online Courses | 50+ projects | 1500+ Hours | Verifiable Certificates | Lifetime Access
4.7 (86,112 ratings)

1. Create the Table using OID

Create table name_of_table (name_of_column1 data_type, name_of_column2 data_type, name_of_column3 data_type, …, name_of_columnN data_type) with (OIDS = TRUE);

2. Create the Table without using OID

Create table name_of_table (name_of_column1 data_type, name_of_column2 data_type, name_of_column3 data_type, …, name_of_columnN data_type) with (OIDS = FALSE);

3. Select Table Data using OID

Select OID, name_of_column1, name_of_column2, name_of_column3, …, name_of_columnN from name_of_table where [condition];

4. Delete Table Data using OID

Delete from name_of_table where OID = (OID_number);

5. Update Table Data using OID

Update name_of_table set name_of_column = (value_of_column) where OID = (OID_number);

Below is the parameter description:

  • Select: It is used to select the OID column from the table. We can select an OID column with another table column at one time.
  • Update: Update operation is used to update the table data. We can also update table data by using the OID column.
  • Delete: It is used to delete the table data. We can also delete table data by using the OID column in PostgreSQL.
  • Name of the table: The name of the table is used to display a table name that is uniquely specified.
  • Data type: This is defined as assign the data type of column at the time of table creation. We can define any data type to the column.
  • With OIDS: This is defined as creating the table by using OIDS, if we define OIDs value as true then OID will be generated to every row in PostgreSQL.
  • Without OIDS: This is defined as creating the table without using OIDS, if we define OIDs value as false then OID will not generate to the row in PostgreSQL.
  • OID: This is defined as an object identifier is defined to every row in PostgreSQL. This is a unique identifier of every row.

How OID Works in PostgreSQL?

Below is the working of OID in PostgreSQL:

  • We can define a unique identifier for each row in PostgreSQL. By default OID is disabled from the table, we need to enable at the time of creating the table.
  • The below example shows that by default OID is disabled in PostgreSQL. We need to define the same at the time of table creation.

Code:

select OID, * from stud1;
create table OID_Test (id int, name varchar, address varchar, phone int) with (oids = true);
insert into OID_Test (id, name, address, phone) values (1, 'ABC', 'Mumbai', 1234567890);
insert into OID_Test (id, name, address, phone) values (2, 'ABC', 'Mumbai', 1234567890);
select OID, * from OID_Test;

Output:

postgresql 1

  • In stud1 table, we have not to define OID at the time of table creation so it will issue the error while selecting data from the table.
  • In the second example, we have created table OID_Test, at the time of table creation we have to define with OIDS as true. After defining the value of OID as true it will show the OID values from the table.
  • By default OID column is hidden in PostgreSQL, we can select this by specifying the name of the OID column.

The below example shows that by default OID column is hidden in PostgreSQL.

Code:

select * from OID_Test;
select OID, * from OID_Test;

Output:

postgresql 2

  • In the first example, we have not defined the OID column, so it will not show the data from the OID column.
  • In the second example, we have defined the OID column, after defining the OID column it will show the data from the OID column.

Examples

Given below are the examples mentioned:

Example #1

Create Table by using OID.

The below example shows that create a table by using OID. We have to create a table name as OID_test1.

Code:

create table OID_Test1 (id int, name varchar, address varchar, phone int) with (oids = true);
\d+ OID_Test1;

Output:

example 1

Example #2

Create Table without using OID.

The below example shows that create a table without using OID. We have created a table name as OID_test2.

Code:

create table OID_Test2 (id int, name varchar, address varchar, phone int) with (oids = false);
\d+ OID_Test2;

Output:

postgresql 3

Example #3

Select the Data from Table using OID.

The below example shows that select data from the table by using OID.

Code:

select OID, * from OID_Test1 where OID = 303176;
select OID, * from OID_Test1;

Output:

postgresql 4

Example #4

Delete Data from Table using OID.

The below example shows that delete data from the table by using OID. We have deleted the “303179” OID from table.

Code:

select * from OID_Test1;
delete from OID_Test1 where OID = 303179;
select OID, * from OID_Test1;

Output:

example 4

Example #5

Update Data from Table by using OID.

The below example shows that update data from the table by using OID.

Code:

select OID, * from OID_Test1;
update OID_Test1 set name = 'PQR' where OID = 303178;
select OID, * from OID_Test1;

Output:

Example 5

Recommended Articles

This is a guide to PostgreSQL OID. Here we discuss the introduction, how OID works in PostgreSQL along with examples. You can also go through our suggested articles to learn more –

  1. PostgreSQL Limit Offset
  2. PostgreSQL Float
  3. PostgreSQL Client
  4. PostgreSQL DELETE
Popular Course in this category
PostgreSQL Course (2 Courses, 1 Project)
  2 Online Courses |  1 Hands-on Project |  7+ Hours |  Verifiable Certificate of Completion
4.5
Price

View Course
0 Shares
Share
Tweet
Share
Primary Sidebar
Footer
About Us
  • Blog
  • Who is EDUCBA?
  • Sign Up
  • Live Classes
  • Corporate Training
  • Certificate from Top Institutions
  • Contact Us
  • Verifiable Certificate
  • Reviews
  • Terms and Conditions
  • Privacy Policy
  •  
Apps
  • iPhone & iPad
  • Android
Resources
  • Free Courses
  • Database Management
  • Machine Learning
  • All Tutorials
Certification Courses
  • All Courses
  • Data Science Course - All in One Bundle
  • Machine Learning Course
  • Hadoop Certification Training
  • Cloud Computing Training Course
  • R Programming Course
  • AWS Training Course
  • SAS Training Course

ISO 10004:2018 & ISO 9001:2015 Certified

© 2022 - EDUCBA. ALL RIGHTS RESERVED. THE CERTIFICATION NAMES ARE THE TRADEMARKS OF THEIR RESPECTIVE OWNERS.

EDUCBA
Free Data Science Course

SPSS, Data visualization with Python, Matplotlib Library, Seaborn Package

*Please provide your correct email id. Login details for this Free course will be emailed to you

By signing up, you agree to our Terms of Use and Privacy Policy.

EDUCBA Login

Forgot Password?

By signing up, you agree to our Terms of Use and Privacy Policy.

EDUCBA
Free Data Science Course

Hadoop, Data Science, Statistics & others

*Please provide your correct email id. Login details for this Free course will be emailed to you

By signing up, you agree to our Terms of Use and Privacy Policy.

EDUCBA

*Please provide your correct email id. Login details for this Free course will be emailed to you

By signing up, you agree to our Terms of Use and Privacy Policy.

Let’s Get Started

By signing up, you agree to our Terms of Use and Privacy Policy.

This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy

Loading . . .
Quiz
Question:

Answer:

Quiz Result
Total QuestionsCorrect AnswersWrong AnswersPercentage

Explore 1000+ varieties of Mock tests View more