CREATE TABLE regions (
region_id SERIAL PRIMARY KEY,
region_name CHARACTER VARYING (25)
);
CREATE TABLE countries (
country_id CHARACTER (2) PRIMARY KEY,
country_name CHARACTER VARYING (40),
region_id INTEGER NOT NULL,
FOREIGN KEY (region_id) REFERENCES regions (region_id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE TABLE locations (
location_id SERIAL PRIMARY KEY,
street_address CHARACTER VARYING (40),
postal_code CHARACTER VARYING (12),
city CHARACTER VARYING (30) NOT NULL,
state_province CHARACTER VARYING (25),
country_id CHARACTER (2) NOT NULL,
FOREIGN KEY (country_id) REFERENCES countries (country_id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE TABLE departments (
department_id SERIAL PRIMARY KEY,
department_name CHARACTER VARYING (30) NOT NULL,
location_id INTEGER,
FOREIGN KEY (location_id) REFERENCES locations (location_id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE TABLE jobs (
job_id SERIAL PRIMARY KEY,
job_title CHARACTER VARYING (35) NOT NULL,
min_salary NUMERIC (8, 2),
max_salary NUMERIC (8, 2)
);
CREATE TABLE employees (
employee_id SERIAL PRIMARY KEY,
first_name CHARACTER VARYING (20),
last_name CHARACTER VARYING (25) NOT NULL,
email CHARACTER VARYING (100) NOT NULL,
phone_number CHARACTER VARYING (20),
hire_date DATE NOT NULL,
job_id INTEGER NOT NULL,
salary NUMERIC (8, 2) NOT NULL,
manager_id INTEGER,
department_id INTEGER,
FOREIGN KEY (job_id) REFERENCES jobs (job_id) ON UPDATE CASCADE ON DELETE CASCADE,
FOREIGN KEY (department_id) REFERENCES departments (department_id) ON UPDATE CASCADE ON DELETE CASCADE,
FOREIGN KEY (manager_id) REFERENCES employees (employee_id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE TABLE dependents (
dependent_id SERIAL PRIMARY KEY,
first_name CHARACTER VARYING (50) NOT NULL,
last_name CHARACTER VARYING (50) NOT NULL,
relationship CHARACTER VARYING (25) NOT NULL,
employee_id INTEGER NOT NULL,
FOREIGN KEY (employee_id) REFERENCES employees (employee_id) ON DELETE CASCADE ON UPDATE CASCADE
);
/*Data for the table regions */
INSERT INTO regions(region_id,region_name) VALUES (1,'Europe');
INSERT INTO regions(region_id,region_name) VALUES (2,'Americas');
INSERT INTO regions(region_id,region_name) VALUES (3,'Asia');
INSERT INTO regions(region_id,region_name) VALUES (4,'Middle East and Africa');
/*Data for the table countries */
INSERT INTO countries(country_id,country_name,region_id) VALUES ('AR','Argentina',2);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('AU','Australia',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('BE','Belgium',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('BR','Brazil',2);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('CA','Canada',2);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('CH','Switzerland',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('CN','China',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('DE','Germany',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('DK','Denmark',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('EG','Egypt',4);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('FR','France',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('HK','HongKong',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('IL','Israel',4);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('IN','India',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('IT','Italy',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('JP','Japan',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('KW','Kuwait',4);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('MX','Mexico',2);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('NG','Nigeria',4);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('NL','Netherlands',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('SG','Singapore',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('UK','United Kingdom',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('US','United States of America',2);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('ZM','Zambia',4);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('ZW','Zimbabwe',4);
/*Data for the table locations */
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (1400,'2014 Jabberwocky Rd','26192','Southlake','Texas','US');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (1500,'2011 Interiors Blvd','99236','South San Francisco','California','US');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (1700,'2004 Charade Rd','98199','Seattle','Washington','US');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (1800,'147 Spadina Ave','M5V 2L7','Toronto','Ontario','CA');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (2400,'8204 Arthur St',NULL,'London',NULL,'UK');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (2500,'Magdalen Centre, The Oxford Science Park','OX9 9ZB','Oxford','Oxford','UK');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (2700,'Schwanthalerstr. 7031','80925','Munich','Bavaria','DE');
/*Data for the table jobs */
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (1,'Public Accountant',4200.00,9000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (2,'Accounting Manager',8200.00,16000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (3,'Administration Assistant',3000.00,6000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (4,'President',20000.00,40000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (5,'Administration Vice President',15000.00,30000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (6,'Accountant',4200.00,9000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (7,'Finance Manager',8200.00,16000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (8,'Human Resources Representative',4000.00,9000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (9,'Programmer',4000.00,10000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (10,'Marketing Manager',9000.00,15000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (11,'Marketing Representative',4000.00,9000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (12,'Public Relations Representative',4500.00,10500.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (13,'Purchasing Clerk',2500.00,5500.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (14,'Purchasing Manager',8000.00,15000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (15,'Sales Manager',10000.00,20000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (16,'Sales Representative',6000.00,12000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (17,'Shipping Clerk',2500.00,5500.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (18,'Stock Clerk',2000.00,5000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (19,'Stock Manager',5500.00,8500.00);
/*Data for the table departments */
INSERT INTO departments(department_id,department_name,location_id) VALUES (1,'Administration',1700);
INSERT INTO departments(department_id,department_name,location_id) VALUES (2,'Marketing',1800);
INSERT INTO departments(department_id,department_name,location_id) VALUES (3,'Purchasing',1700);
INSERT INTO departments(department_id,department_name,location_id) VALUES (4,'Human Resources',2400);
INSERT INTO departments(department_id,department_name,location_id) VALUES (5,'Shipping',1500);
INSERT INTO departments(department_id,department_name,location_id) VALUES (6,'IT',1400);
INSERT INTO departments(department_id,department_name,location_id) VALUES (7,'Public Relations',2700);
INSERT INTO departments(department_id,department_name,location_id) VALUES (8,'Sales',2500);
INSERT INTO departments(department_id,department_name,location_id) VALUES (9,'Executive',1700);
INSERT INTO departments(department_id,department_name,location_id) VALUES (10,'Finance',1700);
INSERT INTO departments(department_id,department_name,location_id) VALUES (11,'Accounting',1700);
/*Data for the table employees */
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (100,'Steven','King','[email protected]','515.123.4567','1987-06-17',4,24000.00,NULL,9);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (101,'Neena','Kochhar','[email protected]','515.123.4568','1989-09-21',5,17000.00,100,9);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (102,'Lex','De Haan','lex.de [email protected]','515.123.4569','1993-01-13',5,17000.00,100,9);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (103,'Alexander','Hunold','[email protected]','590.423.4567','1990-01-03',9,9000.00,102,6);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (104,'Bruce','Ernst','[email protected]','590.423.4568','1991-05-21',9,6000.00,103,6);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (105,'David','Austin','[email protected]','590.423.4569','1997-06-25',9,4800.00,103,6);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (106,'Valli','Pataballa','[email protected]','590.423.4560','1998-02-05',9,4800.00,103,6);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (107,'Diana','Lorentz','[email protected]','590.423.5567','1999-02-07',9,4200.00,103,6);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (108,'Nancy','Greenberg','[email protected]','515.124.4569','1994-08-17',7,12000.00,101,10);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (109,'Daniel','Faviet','[email protected]','515.124.4169','1994-08-16',6,9000.00,108,10);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (110,'John','Chen','[email protected]','515.124.4269','1997-09-28',6,8200.00,108,10);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (111,'Ismael','Sciarra','[email protected]','515.124.4369','1997-09-30',6,7700.00,108,10);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (112,'Jose Manuel','Urman','jose [email protected]','515.124.4469','1998-03-07',6,7800.00,108,10);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (113,'Luis','Popp','[email protected]','515.124.4567','1999-12-07',6,6900.00,108,10);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (114,'Den','Raphaely','[email protected]','515.127.4561','1994-12-07',14,11000.00,100,3);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (115,'Alexander','Khoo','[email protected]','515.127.4562','1995-05-18',13,3100.00,114,3);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (116,'Shelli','Baida','[email protected]','515.127.4563','1997-12-24',13,2900.00,114,3);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (117,'Sigal','Tobias','[email protected]','515.127.4564','1997-07-24',13,2800.00,114,3);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (118,'Guy','Himuro','[email protected]','515.127.4565','1998-11-15',13,2600.00,114,3);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (119,'Karen','Colmenares','[email protected]','515.127.4566','1999-08-10',13,2500.00,114,3);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (120,'Matthew','Weiss','[email protected]','650.123.1234','1996-07-18',19,8000.00,100,5);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (121,'Adam','Fripp','[email protected]','650.123.2234','1997-04-10',19,8200.00,100,5);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (122,'Payam','Kaufling','[email protected]','650.123.3234','1995-05-01',19,7900.00,100,5);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (123,'Shanta','Vollman','[email protected]','650.123.4234','1997-10-10',19,6500.00,100,5);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (126,'Irene','Mikkilineni','[email protected]','650.124.1224','1998-09-28',18,2700.00,120,5);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (145,'John','Russell','[email protected]',NULL,'1996-10-01',15,14000.00,100,8);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (146,'Karen','Partners','[email protected]',NULL,'1997-01-05',15,13500.00,100,8);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (176,'Jonathon','Taylor','[email protected]',NULL,'1998-03-24',16,8600.00,100,8);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (177,'Jack','Livingston','[email protected]',NULL,'1998-04-23',16,8400.00,100,8);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (178,'Kimberely','Grant','[email protected]',NULL,'1999-05-24',16,7000.00,100,8);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (179,'Charles','Johnson','[email protected]',NULL,'2000-01-04',16,6200.00,100,8);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (192,'Sarah','Bell','[email protected]','650.501.1876','1996-02-04',17,4000.00,123,5);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (193,'Britney','Everett','[email protected]','650.501.2876','1997-03-03',17,3900.00,123,5);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (200,'Jennifer','Whalen','[email protected]','515.123.4444','1987-09-17',3,4400.00,101,1);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (201,'Michael','Hartstein','[email protected]','515.123.5555','1996-02-17',10,13000.00,100,2);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (202,'Pat','Fay','[email protected]','603.123.6666','1997-08-17',11,6000.00,201,2);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (203,'Susan','Mavris','[email protected]','515.123.7777','1994-06-07',8,6500.00,101,4);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (204,'Hermann','Baer','[email protected]','515.123.8888','1994-06-07',12,10000.00,101,7);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (205,'Shelley','Higgins','[email protected]','515.123.8080','1994-06-07',2,12000.00,101,11);
INSERT INTO employees(employee_id,first_name,last_name,email,phone_number,hire_date,job_id,salary,manager_id,department_id) VALUES (206,'William','Gietz','[email protected]','515.123.8181','1994-06-07',1,8300.00,205,11);
/*Data for the table dependents */
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (1,'Penelope','Gietz','Child',206);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (2,'Nick','Higgins','Child',205);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (3,'Ed','Whalen','Child',200);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (4,'Jennifer','King','Child',100);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (5,'Johnny','Kochhar','Child',101);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (6,'Bette','De Haan','Child',102);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (7,'Grace','Faviet','Child',109);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (8,'Matthew','Chen','Child',110);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (9,'Joe','Sciarra','Child',111);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (10,'Christian','Urman','Child',112);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (11,'Zero','Popp','Child',113);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (12,'Karl','Greenberg','Child',108);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (13,'Uma','Mavris','Child',203);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (14,'Vivien','Hunold','Child',103);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (15,'Cuba','Ernst','Child',104);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (16,'Fred','Austin','Child',105);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (17,'Helen','Pataballa','Child',106);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (18,'Dan','Lorentz','Child',107);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (19,'Bob','Hartstein','Child',201);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (20,'Lucille','Fay','Child',202);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (21,'Kirsten','Baer','Child',204);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (22,'Elvis','Khoo','Child',115);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (23,'Sandra','Baida','Child',116);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (24,'Cameron','Tobias','Child',117);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (25,'Kevin','Himuro','Child',118);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (26,'Rip','Colmenares','Child',119);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (27,'Julia','Raphaely','Child',114);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (28,'Woody','Russell','Child',145);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (29,'Alec','Partners','Child',146);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (30,'Sandra','Taylor','Child',176); Write, Run & Share PostgreSQL queries online using OneCompiler's PostgreSQL online editor and compiler for free. It's one of the robust, feature-rich online editor and compiler for PostgreSQL. Getting started with the OneCompiler's PostgreSQL editor is really simple and pretty fast. The editor shows sample boilerplate code when you choose database as 'PostgreSQL' and start writing queries to learn and test online without worrying about tedious process of installation.
PostgreSQL is a open source relational database system and is also knows as Postgres.
CREATE command is used to create a table, schema or an index.
CREATE TABLE table_name (
column1 datatype,
column2 datatype,
....);
ALTER command is used to add, modify or delete columns or constraints from the database table.
ALTER TABLE Table_name ADD column_name datatype;
TRUNCATE command is used to delete the data present in the table but this will not delete the table.
TRUNCATE table table_name;
DROP command is used to delete the table along with its data.
DROP TABLE table_name;
RENAME command is used to rename the table name.
ALTER TABLE table_name1 RENAME to new_table_name1;
INSERT Statement is used to insert new records into the database table.
INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);
Select statement is used to select data from database tables.
SELECT column1, column2, ...
FROM table_name;
UPDATE statement is used to modify the existing values of records present in the database table.
UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;
DELETE statement is used to delete the existing records present in the database table.
DELETE FROM table_name where condition;