PostgreSQL Create Table: Create the structure of a table dup_countries similar to countries
3. Write a sql statement to create the structure of a table dup_countries similar to countries.
CREATE TABLE dup_countries AS (SELECT * FROM countries) WITH NO DATA;
postgres=# CREATE TABLE dup_countries AS ( postgres(# SELECT * postgres(# FROM countries) postgres-# WITH NO DATA; SELECT 0
Here is the command to see the structure of the created table :
postgres=# \d dup_countries Table "public.dup_countries" Column | Type | Modifiers --------------+-----------------------+----------- country_id | character varying(3) | country_name | character varying(45) | region_id | numeric(10,0) |
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Previous: Write a SQL statement to create a simple table countries, including columns country_id,country_name and region_id which already exist.
Next: Write a SQL statement to create a duplicate copy of countries table, including structure and data by name dup_countries.
What is the difficulty level of this exercise?