Syntax Here table_name: Is the name of the table field_name: Is the name the column data_type: Is the variable type of the column constrain_name: Is optional. It defines constraints on the column. Tables never have the same name as any existing table in the same schema.
PostgreSQL Create Table: SQL Shell
Here is a step by step process to create table in PostgreSQL: Step 1) Connect to the Database Connect to the database where you want to create a table. We will create a table in database guru99
Step 2) Create a Table Enter code to create a table
Step 3) Check the relation of tables Use command \d to check the list of relations (tables)
Step 4) Try creating the same Table Again try to create the same table, you will get an error
Step 5) Use IF NOT EXISTS parameter Use the parameter IF NOT EXISTS and you will get a notice instead of an error
The list of parameters you can use while creating a table is exhaustive. Here are a few important ones Here is a PostgreSQL create table example of a table with constraints
PostgreSQL Create Table: pgAdmin
Below is a step by step process to create table in pgAdmin: Step 1) In the Object Tree,
Select the Database Select the Schema where you want to create a table in our case public. Click Create Table
Step 2) In the popup, Enter the Table Name
Step 3)
Select the Columns Tab Enter Column Details Click Save
Step 4) In the object tree, you will see the table created
PostgreSQL Delete/Drop Table
The PostgreSQL DROP TABLE statement allows you to remove a table definition and all associated data, indexes, constraints, rules, etc. for that table. You should be cautious while using the command DROP TABLE in PostgreSQL because when a table is deleted, then all the information containing in the table would also be lost permanently.
Syntax:
Example:
Step 1) Let’s check the existing tables using command \d
Step 2) Delete table tutorials using the command
Step 3) Again check for the list of relations and we see the table is deleted using Postgres delete command
Summary
field_name data_type constrain_name );