"alter table add column postgres" Code Answer's
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postgresql add column with constraint
ALTER TABLE customers
ADD COLUMN contact_name VARCHAR NOT NULL;
Source: www.postgresqltutorial.com
alter table add column psql
ALTER TABLE table_name
ADD column_name data_type column_constraint;
Source: www.sqlservertutorial.net
alter table add multiple columns postgresql
ALTER TABLE customer
ADD COLUMN fax VARCHAR,
ADD COLUMN email VARCHAR;
Source: www.postgresqltutorial.com
Postgres: Create Column add constraint to the column with Query Output
ALTER TABLE customers
ADD COLUMN contact_name VARCHAR NOT NULL;
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