Hi
We've got some numbers stored as Reals which are returning values in
scientific notation that we need rounded down to 3 digits to the right
of the decimal.
ie 8.7499999E-2 needs to return 8.75.
Round, cast, convert, formatnumber in the dts package all fail.
Help!
Thanks Moe
I've got some values stored in nvachar(255) field stored by mistake as scientific notation (eg 7.5013e+006 instead of 7501301) and I need to convert and update the field with normal entry, not scientific notation. Is there a way to do that?
View 6 Replies View RelatedWe sometimes have small values stored in a column with datatype of float like 0.000644470739403048 which is being converted to -5.8E-05. Perhaps that is OK to be stored in the database however I need the value in decimal format to use. (I'm using longitude values in google maps).
is there anything I can do at the database level. I was looking at the properties which is 53 numeric precision and 8 length.
I'm trying to find a way to format a FLOAT variable into a varchar inSQL Server 2000 but using CAST/CONVERT I can only get scientificnotation i.e. 1e+006 instead of 1000000 which isn't really what Iwanted.Preferably the varchar would display the number to 2 decimal placesbut I'd settle for integers only as this conversion isn't businesscritical and is a nice to have for background information.Casting to MONEY or NUMERIC before converting to a varchar works finefor most cases but of course runs the risk of arithmetic overflow ifthe FLOAT value is too precise for MONEY/NUMERIC to handle. If anyoneknows of an easy way to test whether overflow will occur and thereforeto know not to convert it then that would be an option.I appreciate SQL Server isn't great at formatting and it would be fareasier in the client code but code this is being performed as adescription of a very simple calculation in a trigger, all stored tothe database on the server side so there's no opportunity for clientintervention.Example code:declare @testFloat floatselect @testFloat = 1000000.12select convert(varchar(100),@testFloat) -- gives 1e+006select cast(@testFloat as varchar(100)) -- gives 1e+006select convert(varchar(100),cast(@testFloat as money)) -- gives1000000.12select @testFloat = 12345678905345633453453624453453524.123select convert(varchar(100),cast(@testFloat as money)) -- givesarithmetic overflow errorselect convert(varchar(100),cast(@testFloat as numeric)) -- givesarithmetic overflow errorAny suggestions welcome...CheersDave
View 3 Replies View Related
Hi All,
Am I missing something or is there something odd with float data types. i know that float is not the most precise definition but i came across something really odd today.
first let me define the scenario.
this is sql server 2005, standard edition build 3042.
I have a table defined as
CREATE TABLE [dbo].[ASSET](
[Property_Num] [numeric](10, 0) NOT NULL,
[Accrual_Factor_Val] [float] NULL
)
the accrual_factor_val was updated to a value of 0.00005 then the web service failed because the proc returned 5E-05!
i opened the table, and discovered this is the stored value. is this correct?
thoughts and ideas?
thanks for your input!
SELECT membername, outputval
case when choice = 0 then outputval else null end as outputval
from MyDatabase
group by membername, outputval
how to format outputval:
if outputval < 40000
format outputval as:
5 - 5.78 - 6.9 - 6,778 - 4,567.8 - 12,456.78 - etc.
if outputval >= 40000
format it as a scientific.
Hi ,
I have one problem regarding format of mixed data columns in excel. I am using this query to retieve data from my excel spreadsheet
Select * from OPENROWSET('Microsoft.Jet.OLEDB.4.0',
'Excel 8.0;IMEX=1;IHDR=yes;Database=E: est.xls;HDR=YES',
'SELECT * FROM [original$]')
to retrieve data from excel sheet.
I am able to retreive all data (numaric and text) , but for few cells I am getting wrong values.
like this
15106749310-> 1.51067e+010
70400672657-> 7.04007e+010
48110753143-> 4.81108e+010
registry setting are €œtext and 0€³. I am also using IMEX=1 in connection string.
I have numeric and text data both in same column,
eg:
70400503549
70400672657
KF1080420908
KF1260370908
KF1260880908
KF1260960908
Could you please help me to get the correct value from excel .
thanks in advance ,
I'm not a professional dba or dbd, but I'm proficient in the basics ofdatabase design and sql. I want to create a database of mathdefinitions, and I'm wondering how one would go about creating adatabase that contains mathematical notation (and I'm not just talkingabout basic symbols where I could get away with ascii code). I needto be able to insert a wide variety of mathematical expressions, fromfractions to integrals, into fields (just like you can enter in-linemath symbols in MS Word using equation editor). I have no clue how togo about this. Is it a matter of developing certain programmingskills/languages? Would such a capabliltiy be proprietary (dbms-specific)? Is it possible at all? Any help would be appreciated.Thank you.
View 3 Replies View RelatedHi,
I am new to SQL 2005. I have to design schema for scientific data warehouse. Data is available in 2 or more flat data files recorded at 1 sec interval. At Least 2 of the data files have 100+ columns. I am inclined to create a table per data file type. I want to know If this is correct/optimal for me to do?
I don't think I can create normalize tables based on the headers in these Data files.
Primary Objective of this data warehouse is make it available for reporting services and Analysis Services.
Any suggestions or tutorials for me?
Thanks,
Vinod Kushwaha
In Reporting Services, is it possible to display a field in Engineering Notation or Scientific notation? I guess can do it by adding a format code, can somebody tell me the format for those notations.
Thanks
Hi,
I am new to SQL 2005. I have to design schema for scientific data warehouse. Data is available in 2 or more flat data files recorded at 1 sec interval. At Least 2 of the data files have 100+ columns. I am inclined to create a table per data file type. I want to know If this is correct/optimal for me to do?
I don't think I can create normalize tables based on the headers in these Data files.
Primary Objective of this data warehouse is make it available for reporting services and Analysis Services.
Any suggestions or tutorials for me?
Thanks,
Vinod Kushwaha
I'm in Visual Studios working on a data flow. I want to add some notes. I open a text box (by typing on the screen).
Why can I only get ONE line of text???? The return key doesn't work.
Program Descritpion: Our product allows our customers to enter their product catalogs into our ASP.NET pages and we save the data using SQL Server 2005. Customer use GridViews to edit their data and teh data is broken into manageable groupings (called Field Groups) stored as meta-data in SQL Server Tables. Then when a user wants to edit a set of data they choose the Field Group and we dynamically generate a data source and a gridview, bind them together, and our users update their data. A bit more complicated but that's teh gist.
Another thing they can do, and where our problem occurs, is they can print reports or do exports into excel using this data. Since there are so many fields, they use the Field Groups to select which fields they want included so everything needs to be built dynamcially, at runtime, using the Field Group meta-data. Essentially, I want my grid to have these 10 fields.
Problem:For the export we generate an XML data source using FOR XML in SQL Sprocs. The xml is pulled into a xmldatadocument, trasnformed with an xsl file into an Excel XML Spreadsheet. Our problem is that FOR XML is generating our XML real numbers in scientific format. The xsl "format-number" function does not recognize scientific format and returns NaN (not a number) instead of the value in my spreadsheet. If I leave it blank I get the scientific number but Excel doesn't format it correctly, the cell has an error tag that wants me to choose Number stored as text or convert to a number. I need it to show up on teh Excel form already formatted without that message.
I can't change the DataType of the field in SQL, too many other things depend on it and it needs to be a real. I can't use CONVERT(decimal,fieldName) in SQL because the SQL string is dynmically generated using Dynamic SQL and most of the fields are not real. When we build the Field List we just have field names, we can't check anything to add CONVERT functions to only real fields.
Is there any way to force the XML output to not be scientific for the entire document? Or another function in XSL I'm unaware of (pretty new to xsl)? Or perhaps something I can do in the XML Spreadsheet tags to force the conversion?
I was looking to modify how the INSERT happens with regards to replication only to find my solution in the proc itself. When I edit the proc this is what I am displayed in SQL QA or EM:
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
ALTER procedure "sp_MSins_dboMEETING" @c1 int,@c2 int,@c3 int,@c4 varchar(250),@c5 datetime,@c6 datetime,@c7 bit,@c8 char(1),@c9 datetime,@c10 bit,@c11 bit,@c12 bit,@c13 datetime,@c14 smallint,@c15 datetime,@c16 smallint,@c17 binary(8),@c18 bit,@c19 bit,@c20 bit,@c21 varchar(1000)
AS
BEGIN
insert into "dbo"."MEETING"(
"MEETING_ID", "MEETING_TYPE_ID", "MEETING_STATUS_ID", "TITLE", "START_DATE", "END_DATE", "PUBLISH_IND", "GROUP_IND", "PUBLISH_DATE", "MY_ADVISORS", "SUBMITTED_IND", "ACTIVE_IND", "CREATE_DATE", "CREATED_BY", "LAST_UPDATE_DATE", "LAST_UPDATED_BY", "DATE_INDEXED", "ON_DEMAND_IND", "NOT_REPORTED_IND", "MAJOR_PROJECT_IND", "MAJOR_PROJECT_COMMENT"
)
values (
@c1, @c2, @c3, @c4, @c5, @c6, @c7, @c8, @c9, @c10, @c11, @c12, @c13, @c14, @c15, @c16, @c17, @c18, @c19, @c20, @c21
)
END
GO
create procedure "sp_MSins_dboMEETING";2 @c1 int,@c2 int,@c3 int,@c4 varchar(250),@c5 datetime,@c6 datetime,@c7 bit,@c8 char(1),@c9 datetime,@c10 bit,@c11 bit,@c12 bit,@c13 datetime,@c14 smallint,@c15 datetime,@c16 smallint,@c17 binary(8),@c18 bit,@c19 bit,@c20 bit,@c21 varchar(1000)
as
if exists ( select * from "dbo"."MEETING"
where "MEETING_ID" = @c1
)
begin
update "dbo"."MEETING" set "MEETING_TYPE_ID" = @c2,"MEETING_STATUS_ID" = @c3,"TITLE" = @c4,"START_DATE" = @c5,"END_DATE" = @c6,"PUBLISH_IND" = @c7,"GROUP_IND" = @c8,"PUBLISH_DATE" = @c9,"MY_ADVISORS" = @c10,"SUBMITTED_IND" = @c11,"ACTIVE_IND" = @c12,"CREATE_DATE" = @c13,"CREATED_BY" = @c14,"LAST_UPDATE_DATE" = @c15,"LAST_UPDATED_BY" = @c16,"DATE_INDEXED" = @c17,"ON_DEMAND_IND" = @c18,"NOT_REPORTED_IND" = @c19,"MAJOR_PROJECT_IND" = @c20,"MAJOR_PROJECT_COMMENT" = @c21
where "MEETING_ID" = @c1
end
else
begin
insert into "dbo"."MEETING" ( "MEETING_ID","MEETING_TYPE_ID","MEETING_STATUS_ID","TITLE","START_DATE","END_DATE","PUBLISH_IND","GROUP_IND","PUBLISH_DATE","MY_ADVISORS","SUBMITTED_IND","ACTIVE_IND","CREATE_DATE","CREATED_BY","LAST_UPDATE_DATE","LAST_UPDATED_BY","DATE_INDEXED","ON_DEMAND_IND","NOT_REPORTED_IND","MAJOR_PROJECT_IND","MAJOR_PROJECT_COMMENT" ) values ( @c1,@c2,@c3,@c4,@c5,@c6,@c7,@c8,@c9,@c10,@c11,@c12 ,@c13,@c14,@c15,@c16,@c17,@c18,@c19,@c20,@c21 )
end
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
Is the second version listed at the bottom like a comment or can it actually get called? I am going to script out all of these procs and save them, and then remove the first version (listed at the top) and the use the second version since it does what I need. I just thought it was interesting to see two stored procedures in a single definition, never seen the "PROC_NAME";2 notation, have you? If so please tell me what it does, is it just a way to create a second version of the procedure in a comment type fashion or is it used another way?
Hi
I'm developing a scientific appliation - to forecast the spread of disease. The algorithm has been designed such that different subpopulations reside on separate computers.
The model uses the same set of data repeatedly, and only returns a small signature that reflects the appropriateness of a particular set of parameters.
The model does however change, and I'm looking for a way to roll out this model (which only contains T-SQL, CLR assemblies and service broker code).
I have considered setting up a database on each computer which has the 'data' files which are static, and a separate database which contains the algorithm which can be amended.
Could one then detach the algorithm database making the new version that can then be rolled out (by attaching it to each computer used)?
Is this the best practice? Does anyone have a suggestion as to how to do this?
Go well
Greg
With a database size of almost 2 GB, I run the 'truncate table eventlog command' which completes successfully, but the database size only decreases by about 10 MB so stays too large - indeed the number of rows in the eventlog table is minimal, but the otehr tables in this database don't show such an amount of tables large enough to cause the size issue either. What could be the reason and how can I reduce it (possibly truncating another table but then which one, how could I determine which is too large and needs truncating?).
View 3 Replies View RelatedHi all...
Please forgive the elementary nature of my question, but could someone please explain the differences between these two database backup types:
1. Log backup
2. Log backup no truncate
From what I understand and have read, the "no truncate" backup method keeps the entire transaction log indefinitely. Using the truncation method, the transaction log is either 1) compressed or 2) cleaned up so that any completed transactions are removed from the log. Which one of these is true?
And, for the big question: is it better to run a backup of the transaction log with truncation or not? Our current backup scheme is similar to the following:
Full backup every 24 hours
transaction log backup every hour with no truncation
Should we insert a truncation backup somewhere in here? What is the danger of removing (or compressing) parts of the transaction log? Will this affect the restore process?
Thanks in advance!
Hey guys... i cant figure this out for the life of me. I have a long T-sql query, and when i enter the string "Rental" into the Listingtype, it says invalid column name "Rental" ... im not looking for the value to be a column, im looking for it to match the value in the ListingType column... here's the query:
(
@StudioINT = NULL,
@Br1INT = NULL,
@Br2INT = NULL,
@Br3INT = NULL,
@Br4INT = NULL,
@OverBr4INT = NULL,
@CondoINT = NULL,
@ListingTypevarchar(10) = NULL,
@WindowAirINT = NULL,
@CentralACINT = NULL,
@BalconyDeckPatioINT = NULL,
@UseOfYardINT = NULL,
@DishwasherINT = NULL,
@WasherDryerINT = NULL,
@FireplaceINT = NULL,
@EIKINT = NULL,
@HardwoodFloorsINT = NULL,
@BroadbandNetINT = NULL,
@TVINT = NULL,
@ThermostatINT = NULL,
@LandlordNotPresentINT = NULL,
@SmokingINT = NULL,
@NoPetsAllowedINT = NULL,
@CatINT = NULL,
@MoreCatsINT = NULL,
@SmallDogINT = NULL,
@LargeDogsINT = NULL,
@DoorpersonINT = NULL,
@IngroundPoolINT = NULL,
@AboveGroundPoolINT = NULL,
@ElevatorINT = NULL,
@UseOfGarageINT = NULL,
@LaundryFacilitiesINT = NULL,
@HealthCenterINT = NULL,
@StorageAreasINT = NULL,
@WheelchairAccessINT = NULL,
@BusinessCentersINT = NULL,
@RentChargeMinINT = NULL,
@RentChargeMaxINT = NULL,
@DebugBIT = 1
)
AS
SET NOCOUNT ON
DECLARE @SQL VARCHAR(8000)
SET @SQL = '
SELECT
r.REListingID,
r.REListingDate,
r.Username,
r.ZipCode,
r.ListingType,
r.StudioFlag,
r.BRFlag1,
r.BRFlag2,
r.BRFlag3,
r.BRFlag4,
r.OverBRFlag4,
r.CondoFlag,
a.WindowAir,
a.CentralAir,
a.BalconyDeckPatio,
a.UseOfYard,
a.Dishwasher,
a.WasherDryer,
a.Fireplace,
a.EIK,
a.HardwoodFloors,
a.BroadbandNet,
a.TV,
a.Thermostat,
a.LandlordNotPresent,
a.Smoking,
a.NoPetsAllowed,
a.Cat,
a.MoreCats,
a.SmallDog,
a.LargeDogs,
a.Doorperson,
a.IngroundPool,
a.AboveGroundPool,
a.Elevator,
a.UseOfGarage,
a.LaundryFacilities,
a.HealthCenter,
a.StorageAreas,
a.WheelchairAccess,
a.BusinessCenters,
a.RentCharge,
a.RentFrequency
FROMdb_REListings as r
INNER JOINdb_RentalAmenities AS a ON a.REListingID = r.REListingID
WHERE1 = 1
'
IF @Studio IS NOT NULL
SET @SQL = @SQL + ' AND r.StudioFlag = ' + CONVERT(VARCHAR(20), @Studio)
IF @Br1 IS NOT NULL
SET @SQL = @SQL + ' AND r.BRFlag1 = ' + CONVERT(VARCHAR(20), @Br1)
IF @Br2 IS NOT NULL
SET @SQL = @SQL + ' AND r.BRFlag2 = ' + CONVERT(VARCHAR(20), @Br2)
IF @Br3 IS NOT NULL
SET @SQL = @SQL + ' AND r.BRFlag3 = ' + CONVERT(VARCHAR(20), @Br3)
IF @Br4 IS NOT NULL
SET @SQL = @SQL + ' AND r.BRFlag4 = ' + CONVERT(VARCHAR(20), @Br4)
IF @OverBr4 IS NOT NULL
SET @SQL = @SQL + ' AND r.OverBRFlag4 = ' + CONVERT(VARCHAR(20), @OverBr4)
IF @Condo IS NOT NULL
SET @SQL = @SQL + ' AND r.CondoFlag = ' + CONVERT(VARCHAR(20), @Condo)
IF @ListingType IS NOT NULL
SET @SQL = @SQL + ' AND r.ListingType = ' + CONVERT(char, @ListingType)
IF @WindowAir IS NOT NULL
SET @SQL = @SQL + ' AND a.WindowAir = ' + CONVERT(VARCHAR(20), @WindowAir)
IF @CentralAC IS NOT NULL
SET @SQL = @SQL + ' AND a.CentralAir = ' + CONVERT(VARCHAR(20), @CentralAC)
IF @BalconyDeckPatio IS NOT NULL
SET @SQL = @SQL + ' AND a.BalconyDeckPatio = ' + CONVERT(VARCHAR(20), @BalconyDeckPatio)
IF @UseOfYard IS NOT NULL
SET @SQL = @SQL + ' AND a.UseOfYard = ' + CONVERT(VARCHAR(20), @UseOfYard)
IF @Dishwasher IS NOT NULL
SET @SQL = @SQL + ' AND a.Dishwasher = ' + CONVERT(VARCHAR(20), @Dishwasher)
IF @WasherDryer IS NOT NULL
SET @SQL = @SQL + ' AND a.WasherDryer = ' + CONVERT(VARCHAR(20), @WasherDryer)
IF @Fireplace IS NOT NULL
SET @SQL = @SQL + ' AND a.Fireplace = ' + CONVERT(VARCHAR(20), @Fireplace)
IF @EIK IS NOT NULL
SET @SQL = @SQL + ' AND a.EIK = ' + CONVERT(VARCHAR(20), @EIK)
IF @HardwoodFloors IS NOT NULL
SET @SQL = @SQL + ' AND a.HardwoodFloors = ' + CONVERT(VARCHAR(20), @HardwoodFloors)
IF @BroadBandNet IS NOT NULL
SET @SQL = @SQL + ' AND a.BroadbandNet = ' + CONVERT(VARCHAR(20), @BroadbandNet)
IF @TV IS NOT NULL
SET @SQL = @SQL + ' AND a.TV = ' + CONVERT(VARCHAR(20), @TV)
IF @Thermostat IS NOT NULL
SET @SQL = @SQL + ' AND a.Thermostat = ' + CONVERT(VARCHAR(20), @Thermostat)
IF @LandlordNotPresent IS NOT NULL
SET @SQL = @SQL + ' AND a.LandLordNotPresent = ' + CONVERT(VARCHAR(20), @LandLordNotPresent)
IF @Smoking IS NOT NULL
SET @SQL = @SQL + ' AND a.Smoking = ' + CONVERT(VARCHAR(20), @Smoking)
IF @NoPetsAllowed IS NOT NULL
SET @SQL = @SQL + ' AND a.NoPetsAllowed = ' + CONVERT(VARCHAR(20), @NoPetsAllowed)
IF @Cat IS NOT NULL
SET @SQL = @SQL + ' AND a.Cat = ' + CONVERT(VARCHAR(20), @Cat)
IF @MoreCats IS NOT NULL
SET @SQL = @SQL + ' AND a.MoreCats = ' + CONVERT(VARCHAR(20), @MoreCats)
IF @SmallDog IS NOT NULL
SET @SQL = @SQL + ' AND a.SmallDog = ' + CONVERT(VARCHAR(20), @SmallDog)
IF @LargeDogs IS NOT NULL
SET @SQL = @SQL + ' AND a.LargeDogs = ' + CONVERT(VARCHAR(20), @LargeDogs)
IF @Doorperson IS NOT NULL
SET @SQL = @SQL + ' AND a.Doorperson = ' + CONVERT(VARCHAR(20), @Doorperson)
IF @IngroundPool IS NOT NULL
SET @SQL = @SQL + ' AND a.IngroundPool = ' + CONVERT(VARCHAR(20), @IngroundPool)
IF @AboveGroundPool IS NOT NULL
SET @SQL = @SQL + ' AND a.AboveGroundPool = ' + CONVERT(VARCHAR(20), @AboveGroundPool)
IF @Elevator IS NOT NULL
SET @SQL = @SQL + ' AND a.Elevator = ' + CONVERT(VARCHAR(20), @Elevator)
IF @UseOfGarage IS NOT NULL
SET @SQL = @SQL + ' AND a.UseOfGarage = ' + CONVERT(VARCHAR(20), @UseOfGarage)
IF @LaundryFacilities IS NOT NULL
SET @SQL = @SQL + ' AND a.LaundryFacilities = ' + CONVERT(VARCHAR(20), @LaundryFacilities)
IF @HealthCenter IS NOT NULL
SET @SQL = @SQL + ' AND a.Health Center = ' + CONVERT(VARCHAR(20), @HealthCenter)
IF @StorageAreas IS NOT NULL
SET @SQL = @SQL + ' AND a.StorageAreas = ' + CONVERT(VARCHAR(20), @StorageAreas)
IF @WheelchairAccess IS NOT NULL
SET @SQL = @SQL + ' AND a.WheelchairAccess = ' + CONVERT(VARCHAR(20), @WheelchairAccess)
IF @BusinessCenters IS NOT NULL
SET @SQL = @SQL + ' AND a.BusinessCenters = ' + CONVERT(VARCHAR(20), @BusinessCenters)
IF @RentChargeMin IS NOT NULL AND @RentChargeMAX IS NOT NULL
SET @SQL = @SQL + ' AND a.RentCharge BETWEEN ' + CONVERT(VARCHAR(20), @RentChargeMin) + ' AND ' + CONVERT(VARCHAR(20), @RentChargeMax)
IF @RentChargeMin IS NOT NULL AND @RentChargeMAX IS NULL
SET @SQL = @SQL + ' AND a.RentCharge >= ' + CONVERT(VARCHAR(20), @RentChargeMin)
IF @RentChargeMAX IS NULL AND @RentChargeMAX IS NOT NULL
SET @SQL = @SQL + ' AND a.RentCharge <= ' + CONVERT(VARCHAR(20), @RentChargeMax)
IF @Debug = 1
PRINT @SQL
EXEC (@SQL)
Hi. I am trying to setup php4 to talk to MSSQL 7, but am having no luck. Both are on a Win2k server. I get the error below. Please can someone tell me what to do, or even a step by step guide to setting up php to connect to a MSSQL7 database. I originally created the database in access 2000 and now want to use MSSQL to use it. This is the error i get:
Warning: MS SQL message: Could not locate entry in sysdatabases for database 'customers'. No entry found with that name. Make sure that the name is entered correctly. (severity 16) in C:Websiteewsiteestdb.php on line 13
Warning: MS SQL: Unable to select database: customers in C:Websiteewsiteestdb.php on line 13
Database unavailable
I was running a server with TempDB in RAM (please don't comment on why that's not a good idea). Well, everything was fine until one of our administrator install teh backup exec agent and restarted the server. Since then the server won't start giving an error the Tempdb coulld not be moved into ram. Well, I started the server using the -f parameter and reset the Tempdb in RAM setting to zero. Howeever, it still won't start and gives the same error about not being able to move Tempdb into RAM. Is my only option to rebuild the master database? This is just a backup server but I'd like to avoid the hassle of rebuilding master and reinitializing the databases.
--Buddy
Hi,
I'm trying to work out how to extract the information that I need from a set of database tables and can't think of a way of doing it with SQL.
The database forms the basis for a diary/calendar system for part-time employees and has two tables:
- One is called 'Availability' and holds info on each available hour slot in the calendar. The table just has fields 'time' and 'date', where the time is an integer representing an hour and date is datetime. The calendar runs from 07.00 to 23.00 each day, so there could be 16 rows in 'Availability' for one day. If any part of a day is unavailable (i.e. the employee doesn't work then) there will be no corresponding rows in the table.
- The second table is 'Appointments', which holds details of appointments that the employee is booked for. The main fields are 'date', 'time' and 'duration' (integer for minutes). All appointments will cover a time span that is also covered by an available period, but they are not actually linked in any way.
I need an SQL query that will return all available time slots that start at least 60 minutes after any appointments have FINISHED and at least 120 minutes before any appointment STARTS.
Since there is no link between the 'Appointments' table and the 'Availability' table, I can't think of any way of doing this.
Any ideas?
Hi,I would like to convert real data type to datetime type. Example:I have a real data type which is: 23,613456 (23 hours and 0,613456). Iwould like to have it in hh:mm:ss format. How to do this? Can I useconvert/cas function?Thanks for helpRgdsMario
View 1 Replies View RelatedTimings... sometimes there are almost too many ways to do the same thing.The only significant findings I see from all the below timings is:1) Integer math is generally fastest, naturally. Bigint math isn't muchslower, for integers that all fit within an integer.2) Converting float to varchar is relatively slow, and should be avoided ifpossible. Converting from integer to varchar or varchar to int is severaltimes faster.3) Most significantly, and less obvious, CASE expr WHEN .... recomputes exprfor each WHEN condition, unfortunately, and is the same speed (or perhapsslightly slower) as listing WHEN expr = value for each condition. Perhaps anindexed computed column (somehow materialized) would be advisable whenpossible to avoid repeated computations in CASE..WHEN expressions (if thathelps..).Note that if you divide by COUNT(*), most timings below are below onemicrosecond per row, so this all may not be very significant in mostapplications, unless you do frequent aggregations of some sort.COUNT(*) FROM [my_sf_table] = 477446 rowsThe result from each query = either 47527 or 47527.0Platform: Athlon 2000 XP w/512MB RAM, table seems to be cached in RAM, SQL2000, all queries run at least 3 times and minimum timings shown (msec).SRP is a REAL (4 bytes)Fastest ones are near the end.CPU SQL(ms)-- Convert to varchar (implicitly) and compare right two digits-- (original version -- no I didn't write it)4546 select sum(case right(srp,2)when '99' then 1 when '49' then 1 else 0 end)from sf-- Use LIKE for a single comparison instead of two, much faster-- Note that the big speedup indicates that-- CASE expr WHEN y then a WHEN z then b .-- recalculates expr for each WHEN clause2023 select sum(case when srp like '%[49]9' then 1 else 0 end)from sf-- Floating point method of taking a modulus (lacking fmod/modf)2291 select sum(case round(srp - 100e*floor(srp*.01e),0)when 99 then 1 when 49 then 1 else 0 end)from sf-- Round to nearest 50 and compare with 491322 select sum(case round(srp-50e*floor(srp*.02e),0)when 49 then 1 else 0 end)from sf-- Divide by 49 by multiplying by (slightly larger than) 1e/49e811 select sum(floor((cast(srp as integer)%50)*2.04082E-2))from sf-- Integer approach without using CASE731 select sum(coalesce(nullif(sign(cast(srp asinteger)%50-48),-1),0))from sf-- My original integer approach651 select sum(case cast(srp as integer)%100when 99 then 1 when 49 then 1 else 0 end)from sf-- Modulus 50 integer approach without CASE481 select sum((cast(srp as integer)%50)/49)from sf-- Modulus 50 integer approach460 select sum(case cast(srp as integer)%50when 49 then 1 else 0 end)from sf-- bigint without CASE531 select sum((cast(srp as bigint)%50)/49)from sf-- bigint with CASE521 select sum(case cast(srp as bigint)%50when 49 then 1 else 0 end)from sf-- get SIGN to return -1 or 0, then add 1-- much better than the coalesce+nullif approach500 select sum(sign(cast(srp as integer)%50-49)+1)from sf-- SIGN with BIGINT551 select sum(sign(cast(srp as bigint)%50-49)+1)from sfBTW, I know srp should be int to begin with for this to be faster... Okay,so...select cast(srp as int) srp into sf from [my_real_sf_table]720 select sum(case when srp like '%[49]9' then 1 else 0 end) from sf339 select sum(1+sign(srp%50-49)) from sf310 select sum(srp%50/49) from sf300 select sum(case srp%50 when 49 then 1 else 0 end) from sfWhat if it were a char(7)?select cast(cast(srp as integer) as char(7)) srp into sf2 from[my_sf_table]801 select sum(case right(rtrim(srp),2) when '49' then 1when '99' then 1 else 0 end) from sf2717 select sum(case when srp like '%[49]9' then 1 else 0 end) from sf2405 select sum(srp%50/49) from sf2391 select sum(case srp%50 when 49 then 1 else 0 end) from sf2How about varchar(7)?drop table sf2select cast(cast(srp as integer) as varchar(7)) srp into sf2 from[my_sf_table]581 select sum(case right(srp,2) when '49' then 1when '99' then 1 else 0 end) from sf2569 select sum(case when srp like '%[49]9' then 1 else 0 end) from sf2LIKE is faster on VARCHAR than on CHAR columns...Apparently it has to effectively RTRIM the trailing spaces during the LIKEoperation.Is binary collation any faster?drop table sf2select cast(cast(srp as integer) as varchar(7))COLLATE Latin1_General_BIN srpinto sf2 from tbl_superfile561 select sum(case right(srp,2) when '49' then 1when '99' then 1 else 0 end) from sf2530 select sum(case when srp like '%[49]9' then 1 else 0 end) from sf2Binary collation comparisons are slightly faster, though it's not a bigdifference (with just two characters being compared).662 select sum(case convert(binary(2),right(srp,2))when 0x3439 then 1 when 0x3939 then 1 else 0 end) from sf2-----------5037 select right(srp,2) srp,count(*) from my_sf_tablegroup by right(srp,2)order by right(srp,2)920 select cast(srp as int)%100 srp,count(*) from my_sf_tablegroup by cast(srp as int)%100order by cast(srp as int)%100---On the one hand, premature optimization can be a waste of time and energy.On the other hand, understanding performance implications of variousoperations can help write more efficient systems.In any case, an indexed computed column or one updated on a trigger couldvirtually eliminate the need for any of these calculations to be performed,except upon insertion or update, so maybe my comparisons aren't verymeaningful for most applications, considering we're talking about less than3 microseconds per row here worst-case.But the results remind me, some recommend avoiding Identity when it's notnecessary. I find Identity(int,1,1) to be a nice, compact surrogate key thatis useful for quick comparisons, grouping, etc, and so on. Also, it seemsmost appropriate as the primary key to all lookup tables in a star schema inOLAP data warehousing. (?) Of course, in some situations, it's notappropriate, particularly when having a surrogate key violates dataintegrity by allowing duplicates that would not be allowed with a properprimary key constraint, or when the surrogate key is completely redundantwith (especially a short) single-column unique key value that would be abetter selection as the primary key. With multi-column primary keys, I thinkit's sometimes convenient to have a surrogate Identity if only for INclauses that reference that identity column (though EXISTS can usuallyreplace those, so maybe that's a weak excuse for an extra column.)
View 4 Replies View RelatedHello,
I define the sql-query:
SELECT myColumn FROM myPersonsTable WHERE myColumn=@FirstName
then I declare some SqlParameters like:
SqlParameter par=new SqlParameter();
par.ParameterName="@FirstName";
par.Value="John";
mySqlCommand.Parameters.Add(par);
Showing the mySqlCommand.CommandString it will look like:
(A) SELECT myColumn FROM myPersonsTable WHERE myColumn=@FirstName
Is this the real string that is send to the Database (among with some hidden string "John")?...
...or does the real string which is send to the Database look like:
(B) SELECT myColumn FROM myPersonsTable WHERE myColumn='John'
???
If so, where can I retrieve that last string (B)?
Or is (A) the way 'transact sql' operates?
Henk
Greetings,
I have a SQL Server 2000 database using Integrated Security. Users are added directly to the database from their domain name. In the Login section of the Security node in Enterprise Manager they show up as DomainNameUserName. I have four users that have the System Administrator database role. When I use the user function to get their user name they show up as dbo. Is there a way to get their actual domain user name?
Thanks.
A problem so simple I'm a little embarrassed to post it... I am setting up a trigger in which I want to, among other things, record the network ID of the user who performs the action that triggers the trigger. I know there is a variable or function out there to pull that information, but I can't find it, and have tried every variation of "login logname usr_id network_id....." I can find.
So first.... could somebody please tell me the variable or function that will return that piece of information. And second, if you also could point me to a good place, either in print or on line, to look up that kind of information, I would be most grateful.
Thanks.
I was hoping there would be a newbie section in here... But I'll post anyway (And sorry in advance if its a really dumb question)I am using VWDE and have a SQL DB which has been imported from one of my existing forums, when it shows in the database explorer its show like belowtblArcade (jdName)tblArcadePB (jdName)etc..etc...What I want to know is why this DB has (jdName) after the Table name and my other DB's shown don't?? They are just shown as tblArcade
tblArcadePB etc..etc.. My main questions are "How do I remove the brackets from the forum DB" as when I try to preview data in VWDE I get a message Invalid object name 'tblArcade'.I know its to do with this extra bit as it only happens to the tables that have this on the end... Hope that makes sense and someone can help me, if you could reply as if I'm really dumb it would be appreciated
I currently have an application which retrieves stats from a SQL database that are updated throughout the day. My application updates every 3 seconds to retrieve these stats but I found that it's quite expensive to the server's CPU when there are several clients running my application. Are there any other methods for extracting the data that won't require so much CPU. The fact that the database is being hit so much isn't good either. I have already written a webservice hoping that this would improve things but I'm not sure it has.
View 3 Replies View RelatedHi,I want to access the real execution plan via my webapplication after I have executed an SQL statement. I know how to get the estimated execution plan:1 cmd.CommandText = "SET SHOWPLAN_XML ON";2 cmd.ExecuteNonQuery();3 4 cmd.CommandText = myStatement;5 SqlDataReader dataReader = cmd.ExecuteReader();6 7 String plan = String.Empty;8 9 while (dataReader.Read()) {10 plan += dataReader.GetSqlString(0).ToString();11 }12 13 cmd.CommandText = "SET SHOWPLAN_XML OFF";14 cmd.ExecuteNonQuery();I want do compare the estimated costs with the real costs of the same statement. If I change code line 1 an 13 to "SET STATISTICS XML [ON|OFF]" the string "plan" will contain the result of the submitted SELECT statement, but I just need to get the plan and not the result itself. Thanks in Advance,Dominik
View 6 Replies View RelatedHi All,
What is the difference betwen real and float datatype of SQL server.
Please one exapmle for each.
The real datatype is like a float except that real can only store numbers.What does it mean: float can store even characters.
Thanks
Abdul
I have a datagrid that is used to insert values into a table. Before
the insert occurs I want to be able to check that there are no
identical values already in the table. eg. I am inserting names, so am
looking for last name duplicates only.
If a duplicate is found, it should return an error message to the page.
My question is, can I do this duplicate checking via SQL script ie. IF
EXISTS etc... and have the error message returned from there, or do I
need to grab a dataset of the table and look for duplicates before even
going as far as the database with the new value to be inerted?
If the best approach is to catch the duplicate error after executing
the SQL script, how do I grab the error and return it to the page with
the datagrid? I'm sure this is pretty basic, but I am only just now
getting into it.
SQL Server 2000 is being used here.
Thanks!
We are using SQL 7 at 2 different locations, on 2 different Domains that are connected via a T1 line.
We need to have our 2 SQL servers be identical at all times, meaning when a change is made on one server, it is immediately replicated to the other. The problem is that both servers are always being used, so there is no primary/backup server scenario.
Does anyone know if there is a third party software available, or if this is even possible to do, given the fact that the databases are always open ?
Thanks.
Hello,
Can anyone guide me. which is the best method for real time synchronisation of my production server. Is it Transactional Replication or Stand By Server?
Thanks In Advance
Sejal