In this post, we are going to see how to select distinct values from SQL queries/statements. One of the easiest ways to select distinct values is using the DISTINCT keyword. Let's explore this keyword first. DISTINCT DISTINCT is used to remove duplicate rows from the SELECT query and only ...
SQL query: ExecuteSELECT datname FROM pg_database;. GUI tools: Use database clients like DbVisualizer or pgAdmin to view databases visually. psql command: Runpsql -lin a terminal. How to deal with “The term 'psql' is not recognized” error on Windows?
A helpful application of the COALESCE function is to prevent NULL values from appearing in query results. Example 1. Create a table “sales” using the CREATE TABLE command: postgres=#CREATETABLEsales (serial_idintprimarykey, product_namevarchar(50), amountnumeric, discountnumeric);CREATETABLE 2....
How to Rename a Database in PostgreSQL Using pgAdmin If you are a GUI lover and want to rename a database without executing any query, then opt for the pgAdmin(GUI-based development platform for Postgres). Using pgAdmin you can rename a database either by using GUI (manually) or by exec...
In PostgreSQL, the pg_databses catalog holds all the details regarding databases. So, you can run the SELECT query in PostgreSQL to show the list of available databases in pg_databases: SELECT datname FROM pg_database; Note:You can execute this query from pgAdmin's query tool to get the...
Setting up a user in PostgreSQL using pgAdmin Logging queries in PostgreSQL: a comprehensive guide How to list tables in Amazon Redshift Creating a user in PostgreSQL using PSQL Granting MySQL permissions: table and column levels What is SQL? 概要 How to find duplicate values in a SQL...
In this section, we are discussing the plan to create and query the PostgreSQL database in Python before we jump ahead. Please remember we are going to create a PostgreSQL database natively using the PostgreSQL client tool (the tool offered by PostgreSQL that helps to build databases) and the...
Install PgAdmin in Rocky Linux Step 3: Start and Enable Apache Webserver Before setting upPgAdmin4, we need to start theApachewebserver service. This is necessary sincePgAdmin4runs on a webserver. To enable Apache web server, run the command: ...
product storefront search. In the entire post, I’ve described how you can install, configure, and run your first query on Elasticsearch. You can also run a boolean query, have pagination datatable through the Elasticseach, and use UI tools likeKibanato use Elasticsearch with your existing ...
To sum up, what you need to do is:# Access the database server# Access the database (as you can see above)# Select the database (each database has a different way to do this )# Run the query (paste the command we've sent you through the ticket)# Send us the output of the ...