3/20/2024 0 Comments Dbeaver creating tablesRental_duration | smallint | | not null | 3 Title | character varying( 255) | | not null | +-+-+-+-įilm_id | integer | | not null | nextval( 'film_film_id_seq'::regclass) For example, the following shows the structure of the film table in the sample database: \d filmĬolumn | Type | Collation | Nullable | Default Third, execute the \d table_name to or \d+ table_name to show the structure of a table. Second, change the current database to dvdrental sample database: \c dvdrental Code language: Shell Session ( shell ) It’ll prompt you to enter a password for the postgres user. 1) PostgreSQL DESCRIBE TABLE using psqlįirst, connect to the PostgreSQL server using the psql tool: psql -U postgres Code language: Shell Session ( shell ) However, you can query the information in columns of a table in a couple of ways. PostgreSQL does not support the DESCRIBE statement. If you have been using MySQL, you typically use the DESCRIBE statement to find the information about a table. These can fail if there was unvalidated data during the SHOW CREATE ALL TABLESĪLTER TABLE public.vehicles VALIDATE CONSTRAINT fk_city_ref_users ĪLTER TABLE public.rides VALIDATE CONSTRAINT fk_city_ref_users ĪLTER TABLE public.rides VALIDATE CONSTRAINT fk_vehicle_city_ref_vehicles ĪLTER TABLE public.vehicle_location_histories VALIDATE CONSTRAINT fk_city_ref_rides ĪLTER TABLE public.Summary: in this tutorial, you will learn how to use the psql tool and information_schema to describe tables in PostgreSQL. INDEX rides_auto_index_fk_vehicle_city_ref_vehicles (vehicle_city ASC, vehicle_id ASC),ĬONSTRAINT check_vehicle_city_city CHECK (vehicle_city = city)ĬREATE TABLE public.vehicle_location_histories (ĬONSTRAINT vehicle_location_histories_pkey PRIMARY KEY (city ASC, ride_id ASC, "timestamp" ASC)ĬONSTRAINT promo_codes_pkey PRIMARY KEY (code ASC)ĬONSTRAINT user_promo_codes_pkey PRIMARY KEY (city ASC, user_id ASC, code ASC)ĬONSTRAINT "primary" PRIMARY KEY (city ASC, id ASC),ĬREATE VIEW er_view (city, name) AS SELECT city, name FROM ĬREATE SEQUENCE sc_customer_list MINVALUE -9223372036854775808 MAXVALUE -1 INCREMENT -2 START -1 ĪLTER TABLE public.vehicles ADD CONSTRAINT fk_city_ref_users FOREIGN KEY (city, owner_id) REFERENCES ers(city, id) ĪLTER TABLE public.rides ADD CONSTRAINT fk_city_ref_users FOREIGN KEY (city, rider_id) REFERENCES ers(city, id) ĪLTER TABLE public.rides ADD CONSTRAINT fk_vehicle_city_ref_vehicles FOREIGN KEY (vehicle_city, vehicle_id) REFERENCES public.vehicles(city, id) ĪLTER TABLE public.vehicle_location_histories ADD CONSTRAINT fk_city_ref_rides FOREIGN KEY (city, ride_id) REFERENCES public.rides(city, id) ĪLTER TABLE er_promo_codes ADD CONSTRAINT fk_city_ref_users FOREIGN KEY (city, user_id) REFERENCES ers(city, id) INDEX rides_auto_index_fk_city_ref_users (city ASC, rider_id ASC), ) LOCALITY REGIONAL BY TABLE IN PRIMARY REGION ĬONSTRAINT rides_pkey PRIMARY KEY (city ASC, id ASC), INDEX vehicles_auto_index_fk_city_ref_users (city ASC, owner_id ASC) This command opens an interactive SQL shell to a temporary, multi-node in-memory cluster with the movr database preloaded and set as the current database.Ĭrdb_region public.crdb_internal_region NOT VISIBLE NOT NULL DEFAULT default_to_database_primary_region(gateway_region())::public.crdb_internal_region,ĬONSTRAINT users_pkey PRIMARY KEY (city ASC, id ASC)ĬOMMENT ON TABLE ers IS 'This table contains information about users.' ĬONSTRAINT vehicles_pkey PRIMARY KEY (city ASC, id ASC), To follow along, run cockroach demo with the -nodes and -demo-locality flags. For more information about the MovR example application and dataset, see MovR: A Global Vehicle-sharing App. The following examples use MovR, a fictional vehicle-sharing application, to demonstrate CockroachDB SQL statements. The CREATE statement for the database, function, table, view, or sequence. The name of the table, view, or sequence. Show the CREATE statements for all types in the current database. Show the CREATE statements for all schemas in the current database. The ALTER statements follow the CREATE statements to guarantee that all objects are added before their references. As a result, SHOW CREATE ALL TABLES also returns the ALTER statements that add, modify, and validate an object's constraints. This option is intended to provide the statements required to recreate the objects in the current database. Show the CREATE statements for all tables, views, and sequences in the current database. The name of the database, function, table, view, or sequence for which to show the CREATE statement. SHOW CREATE object_name opt_show_create_format_options ALL SCHEMAS TABLES TYPES Parameters Parameter
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