Answers for "add new column in postgresql"

SQL

postgresql add column with constraint

ALTER TABLE customers 
ADD COLUMN contact_name VARCHAR NOT NULL;

Posted by: Guest on February-18-2020

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postgresql insert column

ALTER TABLE table_name
ADD COLUMN new_column_name data_type constraint;

Posted by: Guest on January-26-2021

alter table add column psql

ALTER TABLE table_name
ADD column_name data_type column_constraint;

Posted by: Guest on February-24-2021

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postgres add column from another table

UPDATE student
SET name = institute.inst_name
FROM institute
WHERE student.student_id = institute.inst_id;

Posted by: Guest on August-19-2021

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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 //here
)

Posted by: Guest on August-25-2020

PostgreSQL add column

ALTER TABLE mytable
ADD COLUMN column1 VARCHAR,
ADD COLUMN column2 REAL;

INSERT INTO mytable (column1)
VALUES (v1), (v2), (vn);

Posted by: Guest on September-25-2021

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