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MySQL queries

In this project you will create four MySQL queries. The schema is below, I have attached an EER, and a database dump including sample data will be provided on project acceptance.

We have a database that stores records of earnings and expenses for various machines. For earnings, half of the machines show their earnings as a single amount, e.g. $1,250.25. The other half show their earnings as two values, CoinsLeft and CoinsRight. If CoinsLeft is 1205 and CoinsRight is 962 the dollar amounts would be $301.25 and $240.50, (1205 / 4) and (962 / 4) for a total of $541.75.

Half of the time, amounts recorded are the cumulative total amount earned over the lifetime of the machine. The other half of the time, the amount is just the amount shown, and in these cases the BOOL field ResetEarnings is TRUE.

Queries needed for this project:

1) For a specified date range, show the sum of TotalEarnings OR the total of (CoinsLeft and CoinsRight) for each idMachine. Group results by Location.

If a given idMachine's CountsCoins is TRUE, calculate the total of (CoinsLeft + CoinsRight) / 4 ), otherwise calculate TotalEarnings.

In all cases, you must subtract the last entry's amount from the current entry, EXCEPT the first entry which is not counted in the sum.

However, if a given TotalEarnings row has a TRUE ResetEarnings field, do not subtract the prior entry's earnings and instead add the full amount of TotalEarnings or (CoinsLeft + CoinsRight / 4) for that entry.

Example 1:

idMachine, date, TotalEarnings, ResetEarnings

1, 1/1/2018, 100, 0

1, 1/7/2018, 150, 0

1, 1/14/2018, 250, 0

1, 1/21/2018, 20, 1

1, 1/28/2018, 120, 0

For date range 1/1/2018 - 1/7/2018 the total for idMachine 1 would be: (150 - 100) = $50

For date range 1/1/2018 - 1/14/2018 the total for idMachine 1 would be: (150 - 100) + (250 - 150) = $150

For date range 1/1/2018 - 1/21/2018 the total for idMachine 1 would be: (150 - 100) + (250 - 150) + (20 - 0) = $170

For date range 1/1/2018 - 1/28/2018 the total for idMachine 1 would be: (150 - 100) + (250 - 150) + (20 - 0) + (120 - 20) = $270

Example 2:

idMachine, date, ResetEarnings, CountsCoins, CoinsLeft, CoinsRight

2, 1/1/2018, 0, 1, 4, 8

2, 1/7/2018, 0, 1, 16, 21

2, 1/14/2018, 1, 1, 8, 16

2, 1/21/2018, 0, 1, 10, 20

For date range 1/1/2018 - 1/7/2018 the total for idMachine 2 would be: (16 - 4) + (21 - 8) / 4 = $6.25

For date range 1/1/2018 - 1/14/2018 the total for idMachine 2 would be: (6.25) + ((8 + 16) / 4 )) = $12.25

For date range 1/1/2018 - 1/21/2018 the total for idMachine 2 would be: ($12.25) + (10 - 8) + ((20 - 16) / 4 ) = $13.75

2) For a specific date range, show the sum of Expenses per idMachine, grouped by Location.

3) For a specific date range, show the /net/ (e.g. the result of query 1 minus the result of query 2) per idMachine, grouped by location, WITH a net sum of the machines in each location.

4) For a specific date range, show the number of plays per idMachine, grouped by location. Similar to TotalEarnings, you must subtract the number of plays from the previous entry, and total plays can also be reset when the ResetPlays field is TRUE.

Schema:

MACHINE

Machine ID

Machine name, text

Date purchased

Cost of purchase, integer

CountsCoins, bool

Serial number, text

LOCATION

idLocation

Name

EXPENSE

idExpense

Expense, text

Date

TotalExpense, float

[url removed, login to view]

[url removed, login to view]

TOTALPLAYS

idTotalplays

Totalplays, integer

Date

[url removed, login to view]

[url removed, login to view]

TOTALEARNINGS

idTotalearnings

ResetEarnings, bool

Coins left, integer

Coins right, integer

TotalEarnings, float

Date

[url removed, login to view]

[url removed, login to view]

Beceriler: Veri Tabanı Yönetimi, MySQL, SQL

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İşveren Hakkında:
( 12 değerlendirme ) Portland, United States

Proje NO: #16263004

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arslanarshad0702

I am an experience database adminstration developer. I read your situation and I can help you in this. Please message me for further discussion. I will charge the minimum as possible,

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sagarwal3005

Hi , I can start immediately to write mySQL queries as per the requirement. I am a highly motivated professional expert in programming and design. I will go with you until the queries are 100% accurate and also you can Daha fazlası

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Hi there I am MySQL expert.i can help [url removed, login to view] contact me

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prakash2813

Hi there, I have read the details and checked attached screenshot of UML. I have strong expertise in plsql, pivot tables, dynamic queries, normalization, umls, triggers, procedures and more. Have a look at my profile Daha fazlası

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vinaysinghh

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zahidsaeed96

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murtaza1981

Hi, A SQL Server, SQL Server Integration Services (SSIS), SQL Server Reporting Services (SSRS) and SQL Server Analysis Services (SSAS) expert here. Please feel free to discuss the project with me so that I can wrap Daha fazlası

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kazimking

Hello Sir, hope you are fine, I am interested in your work "MySQL queries". I am ready to write quires from given ERD. i need MYSQL recording for testing the queries in live database ?

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Meagan26

I have read through your project and I am incredibly interested in taking on your project. I am an experienced developer with a diploma in the field of web development.. I have been working in the field of web developm Daha fazlası

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fariolet

Hi, I'm a database adminstrator expert , I have read your job description and I'm ready to create those queries Please feel free to contact me Regards

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SimbaMoor

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