ALTER column postgresql code example

Example 1: postgresql change column type

ALTER TABLE assets ALTER COLUMN name TYPE VARCHAR;

Example 2: alter column in table postgres

ALTER TABLE table_name
  ALTER COLUMN column_name TYPE column_definition;

Example 3: postgres alter table add primary key

-- To set a column as primary key:
ALTER TABLE distributors ADD PRIMARY KEY (tablename);

Example 4: alter table add column postgres

Alter Postgres Table

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