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PostgreSQL - insert data from one table to another
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In this article, we would like to show how to insert data from one table to another in PostgreSQL.
Quick solution:
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INSERT INTO "dst_table" (SELECT * FROM "src_table")Where:
src_tablemeans source table name,dst_tablemeans destination table name.
In this section, we want to show how to copy data with INSERT ... SELECT query.
Note: at the end of this article you can find database preparation SQL queries.
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INSERT INTO "users" ("name", "email", "country")2
SELECT "name", "email", ''3
FROM "members";
create_tables.sql file:
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CREATE TABLE "users" (2
"id" SERIAL,3
"name" VARCHAR(100),4
"email" VARCHAR(100),5
"country" VARCHAR(15),6
PRIMARY KEY ("id")7
);8
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CREATE TABLE "members" (10
"id" SERIAL,11
"name" VARCHAR(50) NOT NULL,12
"surname" VARCHAR(50) NOT NULL,13
"email" VARCHAR(50),14
PRIMARY KEY ("id")15
);insert_data.sql file:
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INSERT INTO "users"2
("name", "email", "country")3
VALUES4
('Tom', 'tom@email.com', 'Poland'),5
('Chris', 'chris@email.com', 'Spain'),6
('Jack', 'jack@email.com', 'Spain'),7
('Kim', 'kim@email.com', 'Vietnam'),8
('Marco', 'marco@email.com', 'Italy'),9
('Kate', 'kate@email.com', 'Spain'),10
('Nam', 'nam@email.com', 'Vietnam');11
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INSERT INTO "members"13
( "name", "surname", "email")14
VALUES15
('John', 'Stewart', 'john@email.com'),16
('Chris', 'Brown', NULL),17
('Kate', 'Lewis', NULL),18
('Ailisa', 'Gomez', 'ailisa@email.com'),19
('Gwendolyn', 'James', NULL),20
('Simon', 'Collins', NULL),21
('Taylor', 'Martin', NULL),22
('Andrew', 'Thompson', 'andrew@email.com');