psql alter table code example
Example 1: alter column in table postgres
ALTER TABLE table_name
ALTER COLUMN column_name TYPE column_definition;
Example 2: postgres alter table add primary key
-- To set a column as primary key:
ALTER TABLE distributors ADD PRIMARY KEY (tablename);
Example 3: postgres alter table owner
ALTER TABLE <tablename> OWNER TO <username>
Example 4: postgres how to add field created at
CREATE TABLE my_table
(
id serial NOT NULL,
user_name text,
created_at timestamp with time zone DEFAULT CURRENT_TIMESTAMP
)
Example 5: alter table add column postgres
Alter Postgres Table