I installed Postgres
and followed the instruction. I create a database and logged in by the master password but I don't find the database even the + mark is not shown in the servers. can anyone help, please?
Unlike in pgAdmin3, with pgAdmin4,here you have to manually connect to a running postgres server andyou already have your specific database (DB) created.
So to set the stage, make sure you have the postgres server is running, and that you have created that DB already too.
Notice (in the image) that I CREATE database XYZ and GRANT all privileges to default user postgres. (Note; to work properly with pgAdmin4, you have to create a user called postgres in order to be able to connect with and log in to pgAdmin4.)
Then here are some quick steps to follow:
When within pgAdmin4, right-click the Servers option and select create.
Note:
In the image you'll see (1) next to "Servers" because I have done this process already. Kindly ignore that).
Select "server group" if you have many servers that you want to better manage. For most basic use cases, go ahead and select "server" (like I did).
For either option you select above, you'll get a pop-box to complete the "connection process". I selected "server" which is appropriate for your use case (see image below).
Note:
"name" field is required
As you can see already, enter a name (I went with "postgres" since it's what I was used to by default in pgAdmin3, but you can enter any name).
Notice the "connect now" checkbox is checked by default so as soon as the process is successful, your DB should display in the sidemenu. (This is a key to confirm that you entered the right info). But you can always uncheck this, to connect later.
Now, click connection tab and you see the image below.
The key fields to fill here, to keep it simple, are host name/address and password. Remember to save after entering your info.
Note:
If on connecting to local machine, localhost or http://127.0.0.1 should do. (I did "localhost")
If connecting to a DB instance in the cloud e.g. AWS, enter the endpoint in the host space. Here's more from AWS
A lot of the other fields have the default settings used when installing postgres and pgAdmin.
If you followed the steps above properly, then you should see something like this after you save.
Here's a good guide from the pgAdmin documentation
In case you created your database as template CREATE DATABASE ... IS_TEMPLATE =true, then the database is considered as "system object" and is not shown in the list if PgAdmin4 option "Show system objects?" is set to false.
Try menu File -> Preferences, in the tree find Browser -> Display, and the option is at the bottom.
Another option is to remove the template option:
ALTER DATABASE xxx IS_TEMPLATE = false
and then you will see your database without changing PgAdmin preferences.
I followed the introductory advice from #MwamiTovi but I still did not have an option to create a server as he noted. However, I was able to get my databases to appear by clicking menu option Object -> Register -> Server and type in the information (hostname/address, port) from my associated psql setup.
This was using PG Admin 4.19 on macOS Big Sur.
Related
I have a heroku postgres database. On pgadmin i can see over 1,700 databases since they are all on the same host. I have set the server connection settings as provided by heroku and i can see my database highlighted in yellow and can access it normally.
I tried disconnecting from the server than edit the db restriction property in the advanced tab and put in my database name(same one as the maintenance db, and without ''). I press save, i reconnect to the server but i can still see all the databases of the server and all the live data of the entire server. Am i missing something?
Don´t download the latest version of pgadmin 4(v.6.10), instead download the v.6.9
link:
https://www.postgresql.org/ftp/pgadmin/pgadmin4/v6.9/windows/
I believe that latest version is buged when we try to especify a dbname for restriction
uninstall 4(v.6.10) and replace (v.6.9)
i faced the same problem here, but installed (v.6.9) and worked great, and brings me only my database
for pgadmin4 you dont need single quotes ... just write the dbname and then tab
How to hide databases that I am not allowed to access
result-image
I have a rails app on heroku that is using a Postgre database. My database has > 40 tables and > 10,000 rows. I would like to delete a lot of data, but it would be much easier if I was able to view and interact with it in a GUI table. I can access my data in rails console, but it's taking too long.
pgweb is a great cross-platform GUI, and it's easy to connect to your Heroku Postgres when launching from the command line.
I installed via Homebrew on a Mac (brew install pgweb), but instructions for other platforms are listed on the site. Here's how I launch pgweb connected to a Heroku Postgres DB:
heroku config:get DATABASE_URL | xargs pgweb --url
And if you want to connect to your localhost:
pgweb --host localhost
I'm a little late here, but this may help someone else who stumbles across this thread...
If you go to your Heroku app's dashboard (through the website) > settings > "Reveal Config Vars" > DATABASE_URL, and paste that URL into the browser.
I use TablePlus for database management, when I paste the link into the browser it asks if it can open TablePlus and then I can edit my production database in real time just like I would in development.
I'm not sure what pasting the URL into the browser will do if you don't have TablePlus. I assume it will request to open any other SQL management app you might have.
As slumdog wrote in the comment to your question, you can use pgAdmin, which comes with your local Postgres installation.
This article explains how to connect your remote heroku db with pgAdmin, using heroku credentials: https://medium.com/#vapurrmaid/getting-started-with-heroku-postgres-and-pgadmin-run-on-part-2-90d9499ed8fb
From the article:
"pgAdmin is a GUI for postgresql databases that can be used to access and modify databases that not only exist locally, but also remotely. For a fresh install of pgAdmin, the dashboard likely contains only one server. This is your local server...
We have to configure a new remote server with its credentials.
right click server(s) > create > server …
Fill out the following:
Name: This is solely for you. Name it whatever you want, I chose ‘Heroku-Run — On’
Under the connection tab: hostname/address. If you go back to your datastores ‘reveal credentials’, this is the host credential. It should look like --**...amazonaws.com
Keep the port at 5432, unless your credentials list otherwise
Maintenance database — this is the database field in the credentials
Username — this is the user field in the credentials
Password — the password field in the credentials. I highly advise checking save password so that you don’t have to copypasta this every time you want to connect.
In the SSL tab, mark SSL mode as require
At this point, if we were to hit ‘save’ (please don’t), something very strange would happen. You’d see hundreds if not thousands of databases appear in pgAdmin. This has to do with how Heroku configures their servers. You’ll still only have access to your specific database, not those of others. In order to avoid parsing so many databases, we have to white list only those databases we care about.
go to the Advanced tab and under db restriction copy the database name (it’s the same value as the Maintenance database field filled earlier)."
Article contains other usefull guidelines and screenshots.
Try GUI of DBWeaver.
https://dbeaver.io/
Download it, after that you can connect your heroku postgres using Database Credentials data.
You can use Heroku's hosted DB viewer on the Overview pane of your dashboard:
Create and click the Dataclip:
Dataclip GUI is fairly easy to use, we can type and customize SQL queries at the top etc.
I cannot add a connection in oracle SQL developer installed.
The error I am getting is:
IO Error :The network adapter could not establish connection.
Also can anyone help me as to what user name and password it is asking?
Is there anything else I need to install.
SQL Developer is a tool which enables you to connect to the database - let's presume an Oracle one. Did you install it? If not, is there any available on the network? If not, you'll have to do that first (i.e. install a database - 11g Express Edition might be your choice, download it here), and then let SQL Developer connect to it.
As of username and password you'd use: database owner is SYS, but - you shouldn't use it for coding training - you'd rather create a new user, or unlock one of pre-installed; unless I'm wrong, 11gXE contains the HR schema (Human Resources). In order to unlock it, establish a connection to the previously mentioned SYS user (remember which password you choose for it during the installation process) and choose the SYSDBA role. Then unlock the HR user and modify its password by issuing the following statements:
alter user hr account unlock;
alter user hr identified by hr;
Now create a new connection to HR user (this time choose the "default" role); you should be able to see its tables, run queries, etc.
Make sure your oracle database is up and running.. if you are using docker you need to restart the oracle docker image in this case.
I had similar issue then i tried to restart the oracle using
docker-compose -f docker-image-oracle.yml -d up (in this case you might have a diff name).
or you can start docker image directly from cmd .
Make sure that your hostname, listener port, sid/service name, username/password are correct.
You can use lsnrctl status to get the port number.
There are four things that come to my mind:
Is your Oracle Database installed and running? If not, install it and make sure it works.
Have you entered the correct username and password? Have you entered the correct hostname and/ or port number? If hostname and port number are wrong, check the listener.ora file (if you have the permission). Alternatively, you can look into the tnsnames.ora file.
Maybe your listener is not working after all. With the command "C:> lsnrctl status" (on cmd), you can check, if the listener works. If it doesn't, run the command "C:> lsnrctl start".
Are you using the right URL?
The following link may help you:
https://community.oracle.com/tech/welcome/discussion/2547624/io-error-the-network-adapter-could-not-establish-the-connection
I want to reduce the number of requirements to get started with my webapp. At the moment you need to run a "create database, create user, grant all" script before you can start debugging.
I'd like the code to be checked out and run straight away without requiring developers to have to read through lots of documentation and do lots of manual steps.
h2 allows you to specify a connection string and it will create the db if it doesn't already exist.
Is it possible to do that using PostgreSQL?
Or is my only option (to meet the requirements) to configure h2 for dev work and PostgreSQL for production?
A connection in Postgres is always to a particular database, but by default every install will have a postgres DB intended for running maintenance commands. The user will still need to supply some superuser login credentials, but assuming you have those, you can run your "create database, create user, grant all" script automatically when the webapp is first accessed.
For instance, have a generated config file which is ignored in source control; before loading the file, check if it exists; if it doesn't, run the install routine.
You can even load an HTML form allowing the user to provide the superuser credentials, choose a name for the DB, and any other commonly-changed configuration options. If these are all defaulted, the "manual step" is simply to glance that they are correct, and click "OK".
I am beginner to PostgreSQL.
I want to connect to another database from the query editor of Postgres - like the USE command of MySQL or MS SQL Server.
I found \c databasename by searching the Internet, but its runs only on psql. When I try it from the PostgreSQL query editor I get a syntax error.
I have to change the database by pgscripting. Does anyone know how to do it?
When you get a connection to PostgreSQL it is always to a particular database. To access a different database, you must get a new connection.
Using \c in psql closes the old connection and acquires a new one, using the specified database and/or credentials. You get a whole new back-end process and everything.
You must specify the database to use on connect; if you want to use psql for your script, you can use "\c name_database"
user_name=# CREATE DATABASE testdatabase;
user_name=# \c testdatabase
At this point you might see the following output
You are now connected to database "testdatabase" as user "user_name".
testdatabase=#
Notice how the prompt changes. Cheers, have just been hustling looking for this too, too little information on postgreSQL compared to MySQL and the rest in my view.
In pgAdmin you can also use
SET search_path TO your_db_name;
The basic problem while migrating from MySQL I faced was, I thought of the term database to be same in PostgreSQL also, but it is not. So if we are going to switch the database from our application or pgAdmin, the result would not be as expected.
As in my case, we have separate schemas (Considering PostgreSQL terminology here.) for each customer and separate admin schema. So in application, I have to switch between schemas.
For this, we can use the SET search_path command. This does switch the current schema to the specified schema name for the current session.
example:
SET search_path = different_schema_name;
This changes the current_schema to the specified schema for the session. To change it permanently, we have to make changes in postgresql.conf file.
Use this commad when first connect to psql
=# psql <databaseName> <usernamePostgresql>
set search_path = 'schema name here'
while connecting to the postgres, you have to opt for default database to connect. If you have nothing, you can use 'postgres' as default.
You can use dbeaver to connect to postgres. UI is good
PgAdmin 4, GUI Tool: Switching between databases
In the PgAdmin Browser on the left hand side, right click on the database you are willing to switch to.
Select a QueryTool from the drop down menu (or any other option that you need, I will stick with the QueryTool for now).
You will see the QueryTool in the PgAdmin window, and on top you will see the active database and the role name.
Now you can write queries against the chosen database.
You can open multiple QueryTools for multiple database, and work with them as you do with your graphical text editor.
In order to be sure that you are querying the proper database, issue the following query:
SELECT session_user, current_database();