Create a view with calculation.DATEDIFF? How?

Hi, i have tables Receipt and Rent. the database is for rent a car company. in the Receipt table i have Total Cost and in the Receipt table Rental Date and Return Date. I want to create a view from those 2 tables and within this view a funktion
which would calculate and subtract the 2 dates (return-rental) in hours, multiply it by a number and put it in the Total Cost column. Like this: if the hours>24 then Total Cost = 24*8 else 24*10 - for an example. And the result should go in the Total cost
column. Im sql beginner so i really dont know how to do that or if it can be done. This is the code for a view (there are more columns and it´s in german) the important ones are Rechnungsbetrag=Total Cost, Ausleihdatum=Rental Date, Ruckgabedatum=Return Date.
I appreciate your help.
CREATE VIEW vRechnung
AS
SELECT tbl_Rechnung.RechnungsNr,tbl_Rechnung.Kunden_ID,tbl_mieten.Ausleihdatum,tbl_mieten.Rückgabedatum,tbl_Rechnung.Rechnungsbetrag ,tbl._mieten.Rückgabedatum,tbl_Sachbearbeiter.Nachname AS Sachbearbeiter
FROM tbl_Rechnung
join
tbl_mieten ON tbl_Rechnung.Kunden_ID=tbl_mieten.Kunden_ID
join
tbl_Sachbearbeiter ON tbl_Rechnung.SVNr=tbl_Sachbearbeiter.SVNr
GO

You can use CASE conditional expression:
-- CASE Conditional Expression
SELECT CASE WHEN DATEDIFF(HH, RentalDate,ReturnDate) > 24 THEN 24*8
ELSE 24*10 END FROM YourTable;
You can use CASE anywhere to replace a scalar value in a SELECT statement.
CASE expression examples:
http://www.sqlusa.com/bestpractices/training/scripts/casefunction/
Kalman Toth Database & OLAP Architect
SQL Server 2014 Design & Programming
New Book / Kindle: Exam 70-461 Bootcamp: Querying Microsoft SQL Server 2012

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Sorry, my mistake. I was thinking about counting distinct events.
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7rouz - you've certainly violated the 10 commandments for posting here...
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Hello!
I'm new to the Oracle world but together with my coworkers we need to very quickly study Oracle to figure out whether we'll add Oracle to our list of supported databases or not.
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loop
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begin
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begin
p_set_context('my_ctx','start_range','3');
end;
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Message was edited by:
ian512

How to create table view with reference table

Hi experts,
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http://learnsqlserver.in/4/Create-View-With-Encryption.aspx. if not, you can descript more detail about requriements, so that more forum members can involve into the thread and help you
out.
Regards,
Sofiya Li
Sofiya Li
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===== ================ ==============
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user9175541 wrote:
I have posted this in SQL/PSL forum, but I hope database experts in this group can give me ideas too, also the need is from BI reports.
I have a table, say, project_milestones, which has these columns in concern:
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proj_id, milestone_name, actual_end_date
===== ================ ==============
1001, Key Element Approve, 2009-10-02
1001, Final Synopsis, 2009-10-07
1001, Final Protocol Approved, 2009-10-15
1001, FPFV, 2010-01-10
1001, LPFV, 2010-03-12
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1002, Final Synopsis, 2009-01-07
1002, Final Protocol Approved, 2009-01-12
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1002, LPFV, 2009-10-04
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Please help me...!!
Please find below my query...!!
WITH RANGE
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                  8 shift_hrs,
                  (LEAST ( SHIFT_END_DT, TODATE) - GREATEST ( FROMDATE, SHIFT_ST_DT)) * 24
                    SHUT_DWN_TIME,
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                  round(((SHIFT_END_DT - SHIFT_ST_DT) * 24 - (LEAST (SHIFT_END_DT, TODATE) - GREATEST (FROMDATE, SHIFT_ST_DT)) * 24) * QuantiTY / (AVAIL - TOTAL_HRS),2)
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KPR
Edited by: BluShadow on 17-Mar-2011 09:48
added {noformat}{noformat} tags for readability

Try creating view on following query, if it can help you:
SELECT shift_date,
    shift_num,
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    total_qty
FROM
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             ROUND(((shift_end_dt -shift_st_dt) *24 -(least(shift_end_dt,      todate) -greatest(fromdate,      shift_st_dt)) *24) *quantity /(avail -total_hrs),      2) total_qty
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                (enddate -startdate) *24 avail,
                 todate,
                 fromdate
             FROM omp a,
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                 FROM
                    (SELECT MAX(enddate -startdate) AS
                    diff
                     FROM ompworkorder)
                CONNECT BY LEVEL <=(diff) *3),
                 master b
             WHERE a.mastermachineid = b.mastermachineid
             AND lvl / 3 <=(enddate -startdate) + 1
             ORDER BY shift_st_dt
         ) a
;Regards,
Dipali.l

How To Create Table View With Same Column name But Different Table?

Hi All,
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The Table that i have:-
Table - PAC051MPROFORMA
Column - mrn,visitid
Table - PAC051TPROFORMA
Column - mrn,visitid
Table - PAC052MTRANSBILL
Column - mrn,visitid
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and
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where
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and
*(a.PAC051TPROFORMA.mrn=PAC052TRANSBILL.mrn)*
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Thanks...

Hi,
SQL> CREATE VIEW pacviewproforma (mrn,visitid,mrn,visitid,mrn,visitid)
2 As Select
3 PAC051MPROFORMA.mrn,
4 PAC051MPROFORMA.visitid,
5 PAC051TPROFORMA.mrn,
6 PAC051TPROFORMA.visitid,
7 PAC052MTRANSBILL.mrn,
8 PAC052MTRANSBILL.visitid
9 from PAC051MPROFORMA,PAC051TPROFORMA,PAC052MTRANSBILL
10 where
11 (PAC051MPROFORMA.mrn=PAC051TPROFORMA.mrn)
12 and
13 (PAC051TPROFORMA.mrn=PAC052MTRANSBILL.mrn);
CREATE VIEW pacviewproforma (mrn,visitid,mrn,visitid,mrn,visitid)
ERROR at line 1:
ORA-00957: duplicate column namePlease give different names to each column.
Something like this..
SQL> CREATE OR REPLACE VIEW pacviewproforma (MPROFORMA_mrn,MPROFORMA_visitid,TPROFORMA_mrn,TPROFORMA
_visitid,MTRANSBILL_mrn,MTRANSBILL_visitid)
2 As Select
3 PAC051MPROFORMA.mrn,
4 PAC051MPROFORMA.visitid,
5 PAC051TPROFORMA.mrn,
6 PAC051TPROFORMA.visitid,
7 PAC052MTRANSBILL.mrn,
8 PAC052MTRANSBILL.visitid
9 from PAC051MPROFORMA,PAC051TPROFORMA,PAC052MTRANSBILL
10 where
11 (PAC051MPROFORMA.mrn=PAC051TPROFORMA.mrn)
12 and
13 (PAC051TPROFORMA.mrn=PAC052MTRANSBILL.mrn);
View created.
SQL> DESC pacviewproforma;
Name                                      Null?    Type
MPROFORMA_MRN                                      NUMBER
MPROFORMA_VISITID                                  NUMBER
TPROFORMA_MRN                                      NUMBER
TPROFORMA_VISITID                                  NUMBER
MTRANSBILL_MRN                                     NUMBER
MTRANSBILL_VISITID                                 NUMBER
ORA-01730: invalid number of column names specifiedThe list of column nmae you specified during the CREATE VIEW should match with the SELECT list of the view.
Twinkle

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