satyambhatt5/sql-and-no-sql

this is sql code will help to understand basic knowledge of the sql query

#SQL

This is sql code will help to understand basic knowledge of the sql query

#There is some of basic query use for the to do the code

https://github.com/thecraigd/Python_SQL/blob/master/mysql.ipynb

##Basic SQL learn

https://www.w3schools.com/sql/default.asp

https://learnsql.com/blog/lead-and-lag-functions-in-sql/

https://www.tutorialspoint.com/sql/sql-create-database.html

###Master in database

https://github.com/at235am/cecs-323-practice-sql/blob/master/sql-practice-classics-model.sql

####Most interview question for the different interview

https://github.com/learning-zone

#Types of Window functions

Aggregate Window Functions

SUM(), MAX(), MIN(), AVG(). COUNT()

#Ranking Window Functions

RANK(), DENSE_RANK(), ROW_NUMBER(), NTILE()

mysql> select customerid,PaymentMethod,totalcharges,

-> RANK() OVER(PARTITION BY PAYMENTMETHOD ORDER BY TOTALCHARGES DESC) AS RANK_VALUE,

-> DENSE_RANK() OVER(PARTITION BY PAYMENTMETHOD ORDER BY TOTALCHARGES DESC) AS DENSEVALUE,

-> ROW_NUMBER() OVER(PARTITION BY PAYMENTMETHOD ORDER BY TOTALCHARGES DESC) AS ROWVALUE

-> FROM MYTABLE;

#Value Window Functions

LAG(), LEAD(), FIRST_VALUE(), LAST_VALUE()

#Syntax

window_function ( [ ALL ] expression ) OVER ( [ PARTITION BY partition_list ] [ ORDER BY order_list] )

window function link ---https://www.sqltutorial.org/sql-window-functions/