Number Of Calculations

May 17, 2006

Users,

My question is about the number of calculation made with my database and my query.

The situation:

Table1: Contains 900 projects
Table2: Contains 13500 timesheets
Table3: Contains 516 Periods

Then there are 3 queries:

Query 1: Calculating the total for the periods
Query 2: Calculating working hours + working hours * total of a period
Query 3: Calculating loancosts of a project.

Query 3 is using 2 and 2 is using 1.

How many calculations are made in total????

Thanks!

Willio

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May 18, 2007

Hello all. I am trying to do a calculation within an SQL script, however it doesnt seem to be working and i'm a little bit lost. If anyone could shed some light on where i'm going wring it would be much appreciated. The code I have is:




select
EMPLOYEE.EMPLOY_REF AS EDIT_REF,
SV_EMPLOYEE_CURRENT_HOLIDAY.ENTITLEMENT,
SV_EMPLOYEE_CURRENT_HOLIDAY.CARRIED_FWD,
SV_EMPLOYEE_CURRENT_HOLIDAY.TAKEN,
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from
EMPLOYEE
left outer join
SV_EMPLOYEE_CURRENT_HOLIDAY
on
EMPLOYEE.EMPLOY_REF = SV_EMPLOYEE_CURRENT_HOLIDAY.EMPLOY_REF
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Hi All,

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=========

create table dbo.t1 (

[PK] varchar (20),

[date] datetime,

[Location] varchar(20),

[Weigth] float,

[Readings] float,

[Days_inc] float

)

go

set nocount on

insert into dbo.t1 values( ' DAFN25S ' , ' 1/1/2004 12:00:00 AM ' , ' A-23 ' , ' 22.6 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' DANS37J ' , ' 1/2/2004 12:00:00 AM ' , ' A-23 ' , ' 27.3 ' , ' 0 ' , '0' )

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insert into dbo.t1 values( ' DRKR13T ' , ' 1/17/2004 12:00:00 AM ' , ' A-23 ' , ' 31.9 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' TRKR54Y ' , ' 1/18/2004 12:00:00 AM ' , ' A-23 ' , ' 29.6 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' RTYT24T ' , ' 1/19/2004 12:00:00 AM ' , ' A-23 ' , ' 23.8 ' , ' 0.0244 ' , '4' )

insert into dbo.t1 values( ' RKCB26T ' , ' 1/24/2004 12:00:00 AM ' , ' A-23 ' , ' 18.3 ' , ' -0.0061 ' , '1' )

insert into dbo.t1 values( ' DKRH51R ' , ' 1/28/2004 12:00:00 AM ' , ' A-23 ' , ' 10.8 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' DRGT77U ' , ' 1/29/2004 12:00:00 AM ' , ' A-23 ' , ' 25.3 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' USNT80T ' , ' 1/30/2004 12:00:00 AM ' , ' A-23 ' , ' 27.3 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' TDNF71Q ' , ' 1/31/2004 12:00:00 AM ' , ' A-23 ' , ' 26.9 ' , ' 0.0014 ' , '4' )

insert into dbo.t1 values( ' DKAH23Y ' , ' 1/2/2004 12:00:00 AM ' , ' B-60 ' , ' 15.4 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' DAKD44T ' , ' 1/3/2004 12:00:00 AM ' , ' B-60 ' , ' 21.7 ' , ' 0.0229 ' , '2' )

insert into dbo.t1 values( ' PDNR56Y ' , ' 1/4/2004 12:00:00 AM ' , ' B-60 ' , ' 19.2 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' DBTG87K ' , ' 1/5/2004 12:00:00 AM ' , ' B-60 ' , ' 17.6 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' KDHR43I ' , ' 1/6/2004 12:00:00 AM ' , ' B-60 ' , ' 19.3 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' QJKD00F ' , ' 1/7/2004 12:00:00 AM ' , ' B-60 ' , ' 20.5 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' KKKR83I ' , ' 1/8/2004 12:00:00 AM ' , ' B-60 ' , ' 18.3 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' KDDR90R ' , ' 1/9/2004 12:00:00 AM ' , ' B-60 ' , ' 20.5 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' TTRC87R ' , ' 1/10/2004 12:00:00 AM ' , ' B-60 ' , ' 19.3 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' RDTD67E ' , ' 1/11/2004 12:00:00 AM ' , ' B-60 ' , ' 19.3 ' , ' 0 ' , '0' )

insert into dbo.t1 values( ' ZDHR44I ' , ' 1/31/2004 12:00:00 AM ' , ' B-60 ' , ' 24.6 ' , ' 0.0428 ' , '9' )

insert into dbo.t1 values( ' SRHT23T ' , ' 2/1/2004 12:00:00 AM ' , ' B-60 ' , ' 29 ' , ' 0.0413 ' , '1' )





set nocount off

go
=============
Summary table:










PK
Location
Sum Weight
reading var.

FKFH34U
A-23
78.9
0.0083

RTYT24T
A-23
108.5
0.0161

RKCB26T
A-23
18.3
-0.0305

TDNF71Q
A-23
90.3
0.0075

DAKD44T
B-60
37.1
0.0229

ZDHR44I
B-60
178.6
0.0199

SRHT23T
B-60
29
-0.0015
Note:
1.'Sum weight' is the accumulation of weight between two readings. The weight of the previous reading is not included in the calculation. Example: the 'sum weight' of location A-23 between the reading on 1/24/2004 to 1/31/2004 is (10.8+25.3+27.3+26.9)= 90.3
2.'Reading var.' is the substraction value of the most recent reading value to the previous date reading values. Example: the 'reading var' for location A-23, between the latest reading on 01/31/2004 and previous reading on 01/24/2004 is 0.0075. If there is no value on previous reading, then the latest date reading is substracted by zero (0). The substraction can only be done on the records of similar reading location (A-23 or B-60, etc).
3. 'Location' is obtained from the most recent date of reading, which is used for the calculation.
4. 'PK' is obtained similarly than procedure at point 3.

Thank you in advance.

WP

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--------------------------------------------------------
float and real (T-SQL)
Approximate number data types for use with floating point numeric data. Floating point data is approximate; not all values in the data type range can be precisely represented.

Syntax
float[(n)]
Is a floating point number data from - 1.79E + 308 through 1.79E + 308. n is the number of bits used to store the mantissa of the float number in scientific notation and thus dictates the precision and storage size. n must be a value from 1 through 53.


n is Precision Storage size
1-24 7 digits 4 bytes
25-53 15 digits 8 bytes


The Microsoft® SQL Server™ float[(n)] data type conforms to the SQL-92 standard for all values of n from 1 to 53. The synonym for double precision is float(53).

real
Floating point number data from –3.40E + 38 through 3.40E + 38. Storage size is 4 bytes. In SQL Server, the synonym for real is float(24).


--------------------------------------------------------

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1 001 2008-01-01 09:00 2008-01-01 11:00
1 002 2008-01-01 09:00 2008-01-01 10:00
1 003 2008-01-01 08:00 2008-01-01 11:00
1 001 2008-01-01 13:00 2008-01-01 14:00
1 002 2008-01-02 13:00 2008-01-02 14:00

The net usage time of room 1 is 5 hours.
The gross total is 8 hours.

Is there a way to calculate this NET total in MSSQL T-SQL or maybe by using a SPROC?

I need this to to bind as a datasource to a Crystal Report document to calculate room availability statistics.

Thanks
Rombolt

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1 | 1 | 1 | 2
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3 | 1 | 1 | 7
4 | 2 | 1 | 10
5 | 10 | 5 | 25

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(
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@ToTime DATETIME,
@Login DATETIME,
@Logout DATETIME
)
RETURNS INT
AS

BEGIN
DECLARE@Temp DATETIME,
@Seconds INT

IF @FromTime > @ToTime
SELECT@Temp = @FromTime,
@FromTime = @ToTime,
@ToTime = @Temp

IF @Login > @Logout
SELECT@Temp = @Login,
@Login = @Logout,
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SELECT@Seconds = CASE
WHEN @FromTime <= @Login AND @Login <= @ToTime AND @ToTime <= @Logout THEN DATEDIFF(second, @Login, @ToTime)
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END

Peter Larsson
Helsingborg, Sweden

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