Note also that specifying a tablespace on specific tables is not supported. You must have created your tablespace prior to this via the CREATE TABLESPACE command - the Npgsql EF Core provider does not do this for you. => modelBuilder.UseTablespace("my_tablespace") When creating a new database, PostgreSQL allows specifying another template database. The Npgsql EF Core provider allows you to specify your database's namespace: protected override void OnModelCreating(ModelBuilder modelBuilder) When the Npgsql EF Core provider creates or deletes a database. PostgreSQL allows you to locate your database in different parts of your filesystem, via tablespaces. => modelBuilder.UseDatabaseTemplate("my_template_db") You can trigger this by using HasDatabaseTemplate in your context's OnModelCreating: protected override void OnModelCreating(ModelBuilder modelBuilder) This can be useful for including database entities which are not managed by Entity Framework Core. CREATE USER Adds a new user to a PostgreSQL database cluster. psql It is a terminal-based front-end to PostgreSQL. ROLES: PostgreSQL manages database access permissions using the concept of roles. Which will be copied as the basis for the new one. You need to use the following commands to add or create a user account and grant permission for database: adduser Linux adduser command to add a user to /etc/passwd file. Super user account in postgres is : postgres which is the database user and also OS user having all the access like :Superuser, Create role, Create DB, Replication, Bypass RLS etc. PostgreSQL allows specifying another "template database" Options => options.UseAdminDatabase("my_admin_db")) ![]() For these cases you can specify the administrative database as follows: protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) However, there are some PostgreSQL-like databases where the postgres database is not available. Second, optionally use IF NOT EXISTS to conditionally. Once you’ve backed up your data, removing your PostgreSQL database is a cinch The process to delete your Postgres database is similar to creating it, only we will be using the drop command. The schema name must be unique within the current database. The following illustrates the syntax of the CREATE SCHEMA statement: First, specify the name of the schema after the CREATE SCHEMA keywords. The execute() method of this class accepts a PostgreSQL query as a parameter and executes it. You can create a cursor object using the cursor() method of the Connection class. Up to now the postgres database was used, which is supposed to always be present. The CREATE SCHEMA statement allows you to create a new schema in the current database. The cursor class of psycopg2 provides various methods execute various PostgreSQL commands, fetch records and copy data. When the Npgsql EF Core provider creates or deletes a database ( EnsureCreated(), EnsureDeleted()), it must connect to an administrative database which already exists (with PostgreSQL you always have to be connected to some database, even when creating/deleting another database). ![]() Database Creation Specifying the administrative db
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