How to Create Users and Databases with Granular Access Permissions in PostgreSQL

'postgres create user and database'

PostgreSQL is a powerful relational database management system that allows you to create users and roles with granular access permissions. This feature provides an additional layer of security by allowing you to control what each user or role can do within the database.

To create a new user or role, you need to use the `CREATE ROLE` command followed by the name of the role and the password. For example:

```sql

CREATE ROLE chartio_schema_user LOGIN PASSWORD 'secure_password';

```

Once you have created a new user or role, you can grant them permissions to access specific tables or databases using the `GRANT` command. For example, to grant the `chartio_schema_user` permission to select data from the `Visitors` table:

```sql

GRANT SELECT ON chartio_read_only.'Visitors' TO chartio_schema_user;

```

You can also create views that limit access to specific columns or tables. For instance, if you want Chartio to only have access to the `Account_ID` and `Date_Created` columns of the `Accounts` table:

```sql

CREATE VIEW chartio_read_only.'Accounts' AS SELECT Account_ID, Date_Created FROM Accounts;

```

Then, grant the `chartio_schema_user` permission to select data from this view:

```sql

GRANT SELECT ON chartio_read_only.'Accounts' TO chartio_schema_user;

```

Additionally, you can create a schema specific to Chartio's read-only user and grant them permissions to access that schema. For example:

```sql

CREATE ROLE chartio_schema_user LOGIN PASSWORD 'secure_password';

GRANT USAGE ON SCHEMA chartio_read_only TO chartio_schema_user;

```

By using schemas and views in combination with granular `GRANT` statements, you can effectively limit access to specific tables and columns within your PostgreSQL database.

For more information on how to use PostgreSQL's advanced security features, refer to the official PostgreSQL documentation.

Postgres create user and database