Folks, i've got a table with a column; ACCOUNT VARCHAR(30). All the values numeric though. (leave abt the datatype yet).
The column is clustered indexed.
SELECT * FROM MYTABLE WHERE LEFT(ACCOUNT,3)='123'
execution plan shows CLUSTERED INDEX SCAN.
SELECT * FROM MYTABLE WHERE ACCOUNT LIKE '123%'
execution plan shows CLUSTERED INDEX SEEK.
How, why. Why doesn't the optimizer works good for the first query?
Howdy!
Hi AllI know that I should supply the DDL for the tables I'm going to talk about,but I'm not 100% on how to generate them just yet. Hopefully my question ismore a query methodology question than how the tables are constructed.My first attempt at the query is as follows:SELECT st.STOCKID, sd.FULLDESCRIPTION, sc.NAME, Sum(sq.QUANTITYINSTOCK) AS'Qty In Stock Total', Sum(st.QUANTITY) AS 'Qty Sold'FROM STOCK s, STOCKCATEGORIES sc, STOCKDESCRIPTIONS sd, STOCKQUANTITIES sq,STOCKTRANSACTIONS stWHERE sc.STOCKCATEGORYID = s.STOCKCATEGORYID AND st.STOCKID = s.STOCKID ANDsd.STOCKID = s.STOCKIDAND sq.STOCKID = s.STOCKID AND (sd.LANGUAGEID='UK') AND(st.TRANSACTIONTYPE=8) AND(sq.QUANTITYINSTOCK > 0)GROUP BY st.STOCKID, sd.FULLDESCRIPTION, sc.NAMEThis works in a fashion, but I need to sort of query the stocktransactionstable again to get the sum of the st.QUANTITY table for st.TRANSACTIONTYPE=1so that I can have an extra select field of Sum(st.QUANTITY) AS 'QtyOrdered', ie transactions with transactiontype of 1 are sales orders andtype 8 are invoices.I basically need to get a report result of:PRODUCT, DESCRIPTION, CATEGORY, CURRENT_STOCK_QTY, SALES_IN_PERIOD,ORDERS_IN_PERIODIs there any pointers whatsoever you can give me to try and get thisdouble-double query to work?Many thanks.Rgds Laphan
View 3 Replies View RelatedI graduated from college about three years ago and have been working as a programmer using MS SQL 2000 and even though I've learned a TON in these past three years I know there is tons more I can learn.
Because my company uses Microsoft SQL Server 2000 I'd like to focus on that, but anything ANSI-SQL is perfectly fine.
So... what are some good books on SQL query optimization and other advanced SQL topics?
Thanks in advance...
I ran across this technique being used in an application the other day. It seems not a good idea to me. What do you think?
1. The proc builds a basic query, nothing real fancy, into a string variable called @SQL defined as varchar 2000. Depending on the result desired, the group by clause can be one of three different sort orders.
2. The string is executed via EXEC @SQL.
It seems to me that the whole process can eliminate the EXEC and just use some other construct. All the parameters are passed in via the initial call to the stored proc. It also seems that every time this is executed it will result in a new query compile and cache useage, no matter what. Wasteful? Should I take the developers aside and knock heads? I think the app was coded by some folks who were rookies then but may be willing to crack open their code. Or, am I the one that is a rookie?
Thanks for your inputs.
hello
i am just starting to learn sql and know the basics, but now im looking for a good book to learn some more. A book that covers stored procedure would be very useful. If possible a book with q and a would be very good because i feel this tests if u understand what was just explaned. but if there is a good book without this it is ok. All sugestions welcome
NubNub
hii am using vs2005 for development of web application for reporting with sqlexpress05 as back end .later when project is ready for deployment i have to deploy the project on remote hosting server where i have limited access and sqlserver2000 database to use.i want to ask is there are any limitation or problem of sqlexpress while deploying it on remote sqlservre 2000.and should i have to to continue with sqlexpress as back end.is there any problems for using dynamic database connections(by using smart tags) other than programaticaly connecting database to asp.net ie by writing code.i am new in developmentplease guide me, please guide
View 2 Replies View Relatedhello all..i have make a searching, but is not good. my code like that:Public Class getall Public Function getitem(ByVal id As String) As DataSet Dim con As SqlConnection = New SqlConnection("Data Source=BOYsqlexpress;Initial Catalog=GAMES;User ID=ha;Password=a") Dim ds As New DataSet() Dim adapter As New SqlDataAdapter("select * from [item] where name like '%" & id & "%'", con) Try con.Open() adapter.Fill(ds, "user") Return ds Catch ex As Exception Console.Write(ex.Message) Finally con.Close() con = Nothing End Try ' Next Return ds End Functionand class my item in database is containning dragon ball 3, counter strikeif i insert dragon, it can display dragon ball 3.but if i insert dragon 3, it not display dragon ball 3.it should display dragon ball 3 .how should i change my code?thx...
View 1 Replies View RelatedHi, gurus!
Of course, you know that this:
... WHERE (COLUMNNAME = @PARAMETER)
works perfectly, but the opposite - when I need to pass
a column name as a parameter - the SQL Server 2000 cursing me...
I was designing some stored procedures and here is what I need:
... WHERE (@COLUMNNAME = 1)
^^^ I need to use a different column names here, so I decided to use
a parameter, but it does not even budge. Of course, I can use workaround:
IF @COLUMNNAME = 'External' THEN
BEGIN
SELECT ... WHERE (External = 1)
END
But, I SO! do not want to do it 9 times - I have 9 column names
to check...
Maybe, there is another way to do it?..
Thanks,
Cheers!
I'm having some trouble working out how to query some data. Rather than explain up front, here's some examples of what I want to achieve:
*******************************************************
I've got a structure which looks vaguely like this:
[ANCESTORS]
Grandparent
Parent
Child
If limit by grandparents, then I only get the lineage for that particular grandparent. I.e.:
SELECT *
FROM [ANCESTORS]
( some sort of joins here )
Where Grandparent.Name = 'Cybill'
This would return all of the children of 'Cybill' and their children. Now, if I use the following query:
SELECT *
FROM [ANCESTORS]
( some sort of joins here )
Where Child.Name = 'Jean'
This would return Jean's parents + the parents of Jean's parents (Jean's grandparents).
Likewise, if I enter:
SELECT *
FROM [ANCESTORS]
( some sort of joins here )
Where Parent.Name = 'Ron'
Then I would get Ron's parents and also his children.
*******************************************************
So, as you can see, at first it appears that I'm after a LEFT JOIN - meaning that the grandparents don't need to have child records to be returned, but, then it turns out that I need INNER JOINS - to limit grandparents when I choose children.
Can anybody see my dilemma here?
Mark-up ASP.net posts here
MarkItUp.com
Hi All
I am planning to do MCDBA, whether it'd good for DBA's, is't worth of doing or not, Please send me your comments.
Thanks
Regards
Ram
I have been using DTS somewhat, but I would like to read a good discussion (with cpmplex examples) of it.
Anyone found either a book on DTS or a good section in a book?
Thanks,
Judith
Does anyone know of any good books on DTS? I am currently using SQL 7.
Thanks in advance
Hi there,
Any good books to Know the internals of MS-SQL server 6.5
Thanks
Vivek
Hi everyone
I'm wondering if there's a better SQL Editor than MS Query Analyzer on the market? I like a lot of the functionality provided by QA but want extra stuff like you get in VB6: intelli-sense (sytanx prompting), auto-complete (CTRL+Space provides list of sp's and tables, etc.) plus any other time saving features.
I've tried a few products but nothing quite hits the mark. Is there a program you use and recommend I trial?
Cheers - Andy
Hi, ive got some work to do on SQL queries, the scenario is below and at the bottom is my attempt at answering in the questions:
Could somebody simply tell me if the answer at the bottow are correct, if not what I have done wrong.
A local company that produces machine parts has decided to develop an in-house database system. They have identified the following tables: -
tblOrders OrderNo, CustomerNo, Date, OrderTotal
tblCustomers CustomerNo, Name, Street, Town, County, Postcode
tblParts PartNo, Description, UnitCost
tblItems OrderNo, PartNo, Quantity, ItemTotal
Create SQL queries to produce the following: -
a) Details of all orders over £1000 sorted by customer
number.
b) A list of all part descriptions and their quantities appearing on order 39
c) Delete all orders placed by customers in
Wrexham.
d) Archive all orders placed by customer Clarke into a new table called
tblArchive.
e) Increase the price of all parts whose description includes the
word “washer” by 4%.
These are my answer, which im not too sure if they are correct. If any1 could tell me if there correct or not that would be great, thanks.
a)
SELECT *
FROM tblOrders
ORDERBY CustomerNO
WHERE OrderTotal > 1000
b)
SELECT tblParts.PartNo, tblParts.Description, tblItems.Quantity
FROM tblItems INNER JOIN tblParts ON tblItems.PartNo = tblParts.PartNo;
WHERE OrderNo = 39
c)
DELETE tblOrders.*
FROM tblOrders INNER JOIN tblCustomers ON tblOrders.CustomerID = tblCustomers.CustomerID
WHERE Town = “Wrexham”
d)
INSERT INTO tblArchive
SELECT *
FROM tblOrders INNER JOIN tblCustomers ON tblOrders.CustomerID = tblCustomers.CustomerID
WHERE Name = “Clarke”
e)
UPDATE tblParts
SET UnitCost = [UnitCost]*1.04
WHERE Description LIKE “*washer” or Description LIKE “washer*” or
Description LIKE “*washer*”
Please help :)
Hi,
I'm about 6 weeks into SQL and SQL Server (7) - I was wondering whether you could share your opinions about which language to use as a programming tool for developing apps for & with SQL Server. I'm choosing between C++ (Visual) or JAVA.
I already know C and the DB-Libe contains a lot of it but I'm kinda trying to expand some horizons. I'm ok with either C++/VC++ or JAVA but I only have time to learn (or be good at) one.
Any suggestions? (I'd like to hear what you think even if you say neither C++ or JAVA - maybe VB? What's easy and marketable is what matters most.)
Thanks.
I've been a SQL Server dba for 5 or 6 years now. With the upcoming release (eventually, I'm sure) of Yukon/SQL2005, I've read that it's important for DBA's to pick up one of the .NET languages - I've figured, I'll try to learn VB.NET - I've had a little exposure to it, and can usually figure out what's going on in VB code I've read - however, I seriously doubt I could write anything in it from scratch - I want to learn it in a bad way - can you all recommend any self-paced books that will walk me thru it? I've never had any formal training with it, don't know a class from a DLL....Thanks in advance for your help!!
View 3 Replies View RelatedHi guysWe have a following problem. For security reasons in each table in ourDB we have addition field which is calculated as hash value of allcolumns in particular row.Every time when some field in particular row is changed we create andcall select query from our application to obtain all fields for thisrow and then re-calculate and update the hash value again.Obviously such approach is very ineffective, the alternative is tocreate trigger on update event and then execute stored procedure whichwill re-calculate and update the hash value. The problem with thisapproach is that end user could then change the date in the tables andthen run this store procedure to adjust hash value.We are looking for some solution that could speed up the hash valueupdating without allowing authorized user to do itThanks in advance,Leon
View 6 Replies View Relatedhello, for a new job i might have to learn SQL. i've neverworked with databases or SQL, so i'll need to learn. cananybody advice me on what would be a good book to learnfrom? i'm quite an experienced programmer, so it doesn'thave to be a dummies guide, and preferably not a bulky booklike the "SQL bible" or something.oh, one of my 'favourite' computer books of all times is"thinking in Java" by bruce eckel, to give you an idea.mike--not sure if there's a better group to ask these questions
View 4 Replies View RelatedWould all of you give me a suggestion of valuable book in terms of SQL ??
I confused what kind of SQL book is going to be good for me to study since
I begin to jump into MS-SQL...
Furthermore, I'd know that various level of book as begginer, intermediate , advance...
Thanks for your help in advance..
Hi all,
I have couple of databases in access which i want to spilit them in backend and frontend, and then put the backend( just tables) in sql and keep frontend in access.
which version of sql is good for me to do that?
by the way there are more than 10 users want to access the front end for dataentry.
all the databases and the sql server can be in the same server.
thanks in advance,
Azi
I'm looking to buy a book about SQL, T-SQL, stored procedures, etc. I'm a web developer, so I don't need a book for a SQL Server administrator. I need a book that tells me what I as a developer need to know about SQL. I'm currently using Visual Studio, SQL Server 2005, ASP.NET 2.0, and VB.NET (and fairly new to all of those) if that makes any difference. The bulk of my web developing experience has been with PHP and MySQL so this is new territory for me. I hope all that makes sense. I would appreciate any suggestions for such a book.
Thanks!
-Mathminded
p.s. I bought a bunch of Wrox books and haven't had them long enough to decide if I like them: "Professional ASP.NET 2.0", "Professional ASP.NET 2.0 Security, Membership, and Role Management", "ASP.NET 2.0 Website Programming", and "Visual Basic 2005". I thought I'd check with the experts before investing in another book. :-)
I am new to SQL2005 and have been given the task of writing some SSIS packages to import some CSV files.
I need to cleans the data as it is imported from my CSV files before it reaches my SQL DB.
I am currently Googling the internet to discover how to do this.
Can anyone recommend a good SSIS book?
I am a C# developer, so a book that has lots of SSIS C# examples would be good.
Any help appreciated.
Regards,
Paul.
HiI have a field containing numbers. I want to do some simple arithmetics with it, say value=value+1 or value=value-1 or or even value+2. What is to be done, is fixed at design time. I think this could be done by loading the row or record to my program and doing the calculations there. And then storing the record back. But this seems too complicated.Is there a single query doing that in data table.
View 3 Replies View Relatedhello,
i am wondering, for what i use relations between tables? if i make sure that the data inserted into the table matches, for what i need table relationships?
i have a table named Pictures with: PictureID, UserID, UserName, PictureName, Description...
do i have to make relationships between UserID from Pictures and UserId from aspnet_Users?
and the second table PicturesComments witch has: CommentID, PictureID, UserID, UserName...
do i have to makre relationship between PictureID from PictureComments and PictureID from Pictures AND between UserID from Pictures and UserId from aspnet_Users?
sorry for this stupid questions...
thanks
I have a complex select statement that is used in several stored procedures. I decided that instead of having x number of T-SQL scripts with the same exact select statement that I would to put this query into a view and then do a select * from View. Recently an instructor told me that this was a bad idea and that anyone who uses a select * from anything should be fired. When I asked for his reasoning his response was to say the least abnoxious. I can understand why a Select * from Table might be a bad idea as the table definition can change, but the chances of a view changing seems much less likely.
Is a view a good idea in this case? Is the Select * from View really a bad idea?
Thanks
I have a simple table right now that has some rows listed like this:Table Name = TicketStatusTicketNumber TicketType Status Time1 Normal In 09/15/2005 10:50:213 Normal In 09/11/2005 19:25:101 Normal Out 09/15/2005 11:45:103 Normal Out 09/11/2005 20:27:092 Normal In 09/14/2005 17:25:101 Normal Pay 09/15/2005 11:15:152 Normal Out 09/14/2005 21:45:30What I want to do is select only 1 row per ticket number, and this row needs to be the row that has the LATEST time for that particular ticket number. Then I want to sort the results by ticket number decending. So for instance, the select I am looking for would bring me back ONLY the following rows in the following order: TicketNumber TicketType Status Time3 Normal Out 09/11/2005 20:27:092 Normal Out 09/14/2005 21:45:301 Normal Out 09/15/2005 11:45:10My issue is I do not know how to go about selecting ONLY 1 row per ticket number, and the row I select has to be the row with the latest date for that particular ticket number.Can any SQL gurus provide me with some code in order to do this? Thanks so much for the help guys!
View 1 Replies View RelatedAnyone has a suggestion on a good book on Replication. How to set it up.. I am looking for a good detailed book on this subject.
View 2 Replies View RelatedWe have some users who are nervous about our upgrading to SQL Server 7.0 even though we will use 6.5 compatibility mode initially while we work through 7.0 upgrade issues in the applications.
Has anyone had bad experiences with the 6.5 compatibility mode feature? Just how good is it?
Cheers
Matt
Hi!
I'm installing a new SQL Server machine. During NT Server
installation our NT support guy converted the only 2GB FAT
C: partition to NTFS. So as of right now all my 4 8GB drives are
NTFS. I think it would be better to keep this C: partition in FAT
because, as of my knowledge, having FAT boot partition can help
to boot the machine in case of NT crash.
Is there anything that I'm really losing by this conversion to NTFS or I
should not be worried so much about it? Does it put my SQL Server
databases, database .dat files or NT Server in more danger situation
in case of any crash?
Or it's giving me some advantages?
Thanks
Ninel
Can anyone tell me if turning on the AUTO_UPDATE_STATISTICS option will have any adverse effects on performance? I've read that it is possible for it to adversely affect performance, because SQL Server “takes a quick break to update database statistics in the middle of the day”. The book does not explain why and I'm always leery of simply accepting something, simply because I’ve read it from a book. This is the first time that I’ve ever heard this and cannot find anything from SQL BOL or any other source.
View 2 Replies View RelatedSorry if this has been posted before, but I performed a search on the archives and didn't find anything !
I have just been turned over a SQL 6.5 SP3 / NT 4.0 SP3 server that has several SQL errors in the event log. I need to find a good book to read/scan, so I can get up to speed on SQL.
Thanks,
Mike Givens MCSE
mikeg@iowa.com
Hey all,
I`m trying to BCP in some data from a csv file. It has dates formatted like d/mm/yy and when run BCP it errors. Of course...SQL language is set to English(United States) so it wants it in mm/dd/yy. But from what I`ve read in the archive, from Sharon at least, is that only in BCP will it use the NT date setting which for me is English(Australian) or d/mm/yy. So I`m thinking, `that`s ok` my data`s dates like d/mm/yy and nt dates like d/mm/yy it`ll bcp in fine - but no.
What can I do? I cant change my sql setting and I cant change the way I dump my dates to the csv! Suggestions......
TY
Simon