Postgres and Open Source Experts

In PostgreSQL, the DROP COLUMN command is used with the collaboration of the ALTER TABLE command to drop single or multiple columns.

In PostgreSQL, the ADD COLUMN command/statement along with the ALTER TABLE clause is used to add single or multiple columns to a table.

In PostgreSQL, the ALTER TABLE command serves multiple functionalities on a table like adding a column, dropping a column, renaming a table/columns, etc.

To drop/delete a table from the PostgreSQL database, open the SQL SHELL and type the DROP TABLE command followed by the table name.

Execute the DROP DATABASE command from psql while dropdb command from the command prompt to remove/drop any specific PostgreSQL database.

There are multiple ways to select or access a PostgreSQL database, such as Command Prompt (cmd), SQL SHELL (psql), and pgAdmin 4.

Download PostgreSQL “exe” file > open downloaded file > specify installation directory > select components > select directory > set password > and install.

Tables in PostgreSQL can be created following the syntax discussed in the article. You can insert, update, read, and delete data from the table with the help of queries.