Prepared for Prof. JAI NAVLAKHA By Hsin-Yu Ha COP4710 Information storage & retrieval Connect to PostgreSQL server via pgAdmin Prepared for Prof. JAI NAVLAKHA By Hsin-Yu Ha

Procedure outline Download pgAdmin from http://www.pgadmin.org/ Install pgAdmin Connect to PostgreSQL through pgAdmin Start creating your own database. May 2016: Download v1.22.1 (not v1.12.3 as stated in Slide 4)

Download pgAdmin (1) Go to PgAdmin Website Click download

Download pgAdmin (2) Select the latest reliable version v1.12.3

Download pgAdmin (3)

Download pgAdmin (4) Download pgadmin3-1.12.3.zip and extracted.

Install pgAdmin (1) After extracting the zip file “pgadmin3-1.12.3.zip” , execute the file pgadmin3.msi and start the installation process.

Install pgAdmin (2)

Install pgAdmin (3)

Install pgAdmin (4) The installation is successfully finished

Connect to PostgreSQL (1) Open pgAdmin and add a connection to a server

Connect to PostgreSQL (2) Name for server connection: cop4710 Host server: cop4710-postgresql.cs.fiu.edu Database Name: fall17_FIUusername Username: fall17_FIUusername Password: Panther ID

Create a database (1) Create table Primary key and Foreign key Constraints: NOT NULL UNIQUE CHECK Boolean expression For instance CHECK (price>0) (4) PRIMARY KEY (5) FOREIGN KEY CREATE TABLE products ( product_no integer PRIMARY KEY, name text NOT NULL, price numeric ); Primary key and Foreign key CREATE TABLE order_items ( product_no integer REFERENCES products, order_id integer REFERENCES orders, quantity integer, PRIMARY KEY (product_no, order_id), CONSTRAINT cq CHECK (quantity > 5) );

Create a database (2) Foreign Key CREATE TABLE other_table ( c1 integer PRIMARY KEY, c2 integer ); CREATE TABLE t1 ( a integer PRIMARY KEY, b integer, c integer, FOREIGN KEY (b, c) REFERENCES other_table (c1, c2) );

Create a database (3) CREATE TABLE products ( product_no integer PRIMARY KEY, name text, price numeric ); CREATE TABLE orders( order_id integer PRIMARY KEY, shipping_address text, … CREATE TABLE order_items ( product_no integer REFERENCES products ON DELETE RESTRICT, order_id integer REFERENCES orders ON DELETE CASCADE, quantity integer, PRIMARY KEY (product_no, order_id)

Create a database (4) Insert Data INSERT INTO products (product_no , name ,price) VALUES (1,'cheese',5); INSERT INTO products VALUES (1,'cheese',5), (2,’cake’,10) ;

Create a database (5) Import Data Export Data COPY country FROM '/usr1/proj/bray/sql/country_data.csv' WITH DELIMITER ',' ; COPY country TO '/sql/country_data.csv' WITH DELIMITER '|';

Create a database (6) ALTER Table Add columns Remove columns Add constraints ALTER TABLE products ADD COLUMN description text; ALTER TABLE products DROP COLUMN description; ALTER TABLE products ADD CONSTRAINT namecheck CHECK (name <> ''); ALTER TABLE products ADD CONSTRAINT some_name UNIQUE (product_no); ALTER TABLE products ADD FOREIGN KEY (product_group_id) REFERENCES product_groups; ALTER TABLE products ALTER COLUMN product_no SET NOT NULL;

Create a database (7) ALTER Table Remove constraints Change column data types Rename columns Rename tables ALTER TABLE products DROP CONSTRAINT some_name; ALTER TABLE products ALTER COLUMN product_no DROP NOT NULL; ALTER TABLE products ALTER COLUMN price TYPE numeric(10,2); ALTER TABLE products RENAME COLUMN product_no TO product_number; ALTER TABLE products RENAME TO items;

Create a database (8) Delete Data DELETE FROM products WHERE price = 10; DELETE FROM products