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NS_DAY1_Notes.sql
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NS_DAY1_Notes.sql
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--DDL - > data definition language
create table amazon_orders
(
order_id integer,
order_date date,
product_name varchar(100),
total_price decimal(6,2),
payment_method varchar(20)
);
--delete a table
--drop table amazon_orders;
--DML -> data Manipulation language
insert into amazon_orders values(1,'2022-10-01','Baby Milk',30.5,'UPI');
insert into amazon_orders values(2,'2022-10-02','Baby Powder',130,'Credit Card');
insert into amazon_orders values(3,'2022-10-01','Baby cream',30.5,'UPI');
insert into amazon_orders values(4,'2022-10-02','Baby soap',130,'Credit Card');
--to delete data
delete from amazon_orders;
--SQL--> structured query language
-- DQL -> data querying language
select * from amazon_orders;
--limiting columns or selecting specific columns
select product_name,order_date,total_price from amazon_orders;
--limiting rows
select top 1 * from amazon_orders;
--data sorting
select * from amazon_orders
order by order_date desc,product_name desc,payment_method;
create table .rock
(
id integer,
name varchar(10)
)
/*
data types--
integer -> 1,2,3,-1,-2
date - > '2020-11-01'
varchar(100) - > 'baby milk'
decimal(5,2) -> 1234.45
drive--folder1
drive --folder2
*/