Find the rent based on date selected via filter

[Anonymous]

Hello everyone,

I have two tables namely,

Rent_Entity and Rent_Modification.

Rent Entity has all the information about the tenant/contract. Rent Modification is for any rent increase/decrease happened on the contract level.

Now let's say, if I have to select the rent roll for today, I will get all the latest data for the specific contract. But If someone asks me to provide the rent roll on a specific date in past, I need to have the rent for specific contract at that point of time.

For eg.

rent_entity
id	Contract_Name	total_rent	einzug	auszug
10	70_M_05.01	568.9	01-11-1980

rent_modification
contract_id	old_value	new_value	difference	state	start_date	end_date	Kind
10	518.9	568.9	50	approved	1-Feb-19		RENT
10	468.9	518.9	50	approved	1-Feb-19		RENT
10	105	125	20	draft	4-Feb-19		BK

If I take the rent roll for this contract 70_M_05.01, it will give me the rent 568.9 but If I need the rent roll in jan 2019 or in any past date then the rent should show 468.9 as you can see in the old_value of rent_modification table. I also have to have include certain criteria like state = "approved" and Kind = "RENT".

@Ashish_Mathur @Greg_Deckler  @Zubair_Muhammad 

Please Help!!!!!

[Ashish_Mathur]

Hi,

Why should the rent for Jan 2019 be 468.9?  In that row, i do not see the date of Jan 2019 at all.

[Anonymous]

Hi @Ashish_Mathur . Since the rent increment was happened on 1st Feb 2019 as you see in the rent_modification table. So if I need the rent roll for Jan it should be the previous rent before the increment which is 468.9 in the old_value column. 

[LivioLanzo]

Hi @Anonymous 

I see something strange in your second table, should not the second row have an end date? Should not the 'start_date' be different between the first row and the second row? 

[Anonymous]

Hi @LivioLanzo ,  It's correct. Somtimes because of some faulty entries we have this kind of data in the db. We don't have end_date for RENT increase because it's a one time increment. End_Date is for other kind of Rent Increase/Decrease where we do certain amount increment/decrement each month for a period of time. For eg. Rent reduction because of something broke in the apartment then we give tenants a discount on rent for few months.