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  • Should i really use integer primary IDs [sql]

    - by arthurprs
    For example, i always generate an auto-increment field for the users table, but i also specifies an UNIQUE index on their usernames. There is situations that i first need to get the userId for a given username and then execute the desired query. Or use a JOIN in the desired query. It's 2 trips to the database or a JOIN vs. a varchar index The above is just an example There is a real performance benefit on INT over small VARCHAR indexes? Thanks in advance!

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  • SQL Server Stored Procedure that return processed records number

    - by Ras
    I have a winform application that fires a Stored Procedure which elaborates several records (around 500k). In order to inform the user about how many record have been processed, I would need a SP which returns a value every n records. For example, every 1000 row processed (most are INSERT). Otherwise I would be able only to inform when ALL record are processed. Any hints how to solve this? I thought it could be useful to use a trigger or some scheduled task, but I cannot figure out how to implement it.

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  • SQL Like query last match

    - by teepusink
    Hi, I've a database that has a name field. (i.e Firstname M. Lastname or just Firstname Lastname). Trying to filter by lastname. How can I do a query to find the last space? Something like select * from person where name like "% a%" (but the space is the last space) Thanks, Tee

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  • Figuring out the resource a lock in SQL Server 2000 affects

    - by Michael Lang
    I am adding a simple web-interface to show data from a commercial off the shelf (COTS) application. This COTS issues locks on any record the user is actively looking at (whether they intend to edit and update it or not). I have found sp_lock and the Microsoft sp_lock2 scripts and can see the locks, so that's all well and good. However, I cannot figure out how I can tell if a specific record I am about to update has been affected by one of these locks. If I submit the update request and there is in fact a lock, the web-interface will wait indefinitely until the user closes the window in the COTS. How can I either: a) determine before issuing an update that the record has been locked OR b) issue an update that will immediately return with a LOCKED status rather than indefinitely waiting on the COTS user to close their window on that record?

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  • Help with this JET Sql Query [SOLVED]

    - by yae
    Hi: I need help to do this query select. for example I have these fields: idInvoice date amount Depending of the date I need multiply the field "amount" for x number or other one. For example, if the date is less 01/01/2010 to multiply for 20 . But if it is major or equal to multiply for 35 Select idInvoice, date, amount, amount * varNumber from invoices

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  • ignore some values in insert into select from sql stament

    - by nitroxn
    Suppose that I have a Table Symbols(Symbol, Value) and a Table SymbolValues (Symbol, Value) which contains a list of values for the symbol. How to choose maximum values fromt he SymbolValues table and insert into Symbols table. For Example, The SymbolValues Table has following values A 1 A 2 A 3 B 6 B 7 Then only A 3 and B 7 should be inserted in the Symbols table. Is this possible using insert into select statement. Thanks

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  • T-SQL UPDATE trigger help

    - by Tan
    Hi iam trying to make an update trigger in my database. But i get this error every time the triggers trigs. Error MEssage: The row value(s) updated or deleted either do not make the row unique or they alter multiple rows(3rows) and heres my trigger ALTER TRIGGER [dbo].[x1pk_qp_update] ON [dbo].[x1pk] FOR UPDATE AS BEGIN TRY DECLARE @UserId int , @PackareKod int , @PersSign varchar(10) SELECT @PackareKod = q_packarekod , @PersSign = q_perssign FROM INSERTED IF @PersSign IS NOT NULL BEGIN IF EXISTS (SELECT * FROM [QPMardskog].[dbo].[UserAccount] WHERE [Account] = @PackareKod) BEGIN SET @UserId = (SELECT [UserId] FROM [QPMardskog].[dbo].[UserAccount] WHERE [Account] = @PackareKod) UPDATE [QPMardskog].[dbo].[UserAccount] SET [Active] = 1 WHERE [Account] = @PackareKod UPDATE [QPMardskog].[dbo].[User] SET [Active] = 1 WHERE [Id] = @UserId END END END TRY But i only update one row in the table how can it says 3 rows. Please advise.

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  • Multiple column sorting (SQL SERVER 2005)

    - by Newbie
    I have a table which looks like Col1 col2 col3 col4 col5 1 5 1 4 6 1 4 0 3 7 0 1 5 6 3 1 8 2 1 5 4 3 2 1 4 The script is declare @t table(col1 int, col2 int, col3 int,col4 int,col5 int) insert into @t select 1,5,1,4,6 union all select 1,4,0,3,7 union all select 0,1,5,6,3 union all select 1,8,2,1,5 union all select 4,3,2,1,4 I want the output to be every column being sorted in ascending order i.e. Col1 col2 col3 col4 col5 0 1 0 1 3 1 3 1 1 4 1 4 2 3 5 1 5 2 4 6 4 8 5 6 7 I already solved tye problem by the folowing program Select x1.col1 ,x2.col2 ,x3.col3 ,x4.col4 ,x5.col5 From (Select Row_Number() Over(Order By col1) rn1, col1 From @t)x1 Join(Select Row_Number() Over(Order By col2) rn2, col2 From @t)x2 On x1.rn1=x2.rn2 Join(Select Row_Number() Over(Order By col3) rn3, col3 From @t)x3 On x1.rn1=x3.rn3 Join(Select Row_Number() Over(Order By col4) rn4, col4 From @t)x4 On x1.rn1=x4.rn4 Join(Select Row_Number() Over(Order By col5) rn5, col5 From @t)x5 On x1.rn1=x5.rn5 But I am not happy with this solution. Is there any better way to achieve the same? (Using set based approach) If so, could any one please show an example. Thanks

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  • Help with Parameterizing SQL Query for C# with possible null values

    - by Jhonny D. Cano -Leftware-
    Hello, people. I need help with parameterizing this query. SELECT * FROM greatTable WHERE field1 = @field1 AND field2 = @field2 The user should be able to search for any of the 2 fields, and the user also should be able to search if the field2 has null values. var query = "theQuery"; var cm = new SqlCommand(cn, query); cm.AddParameter("@field1", "352515"); cm.AddParameter("@field2", DBNull.Value); // my DataTable here is having 0 records var dt = GetTable(cm);

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  • SQL query showing missing expression

    - by Ashok Dasari
    Query to pull the data between Yseterday 6AM to today 6AM ... SELECT lot_id, log_time, batch_no, eqp_id, STATION_ID, EXTRACTVALUE (META_DATA, '/lot_info/A3') AS A3, EXTRACTVALUE (META_DATA, '/lot_info/A3Info') AS A3Info, EXTRACTVALUE ( META_DATA, '/lot_info/apc_status_info' ) AS apc_status_info FROM t_dlis_log_history WHERE ( (EQP_ID = 'ALC4360') OR (EQP_ID = 'ALC4361') OR (EQP_ID = 'ALC1360') OR (EQP_ID = 'ALC1361') OR (EQP_ID = 'ALC1362') OR (EQP_ID = 'ALC1363') OR (EQP_ID = 'ALC1364') OR (EQP_ID = 'ALC1365') OR (EQP_ID = 'ALC355') OR (EQP_ID = 'ALC353') OR (EQP_ID = 'ALC4350') OR (EQP_ID = 'ALC354') ) AND (( log_time >= DATEADD ( HOUR, 6, CONVERT(VARCHAR (10), GETDATE (), 110) ) AND ( log_time <= DATEADD ( HOUR, 6, CONVERT(VARCHAR (10), GETDATE () + 1, 110) ) ) ) It is showing error missing expression ...

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  • Relating categories with tags using SQL

    - by Pablo
    I want be able to find tags of items under the a certain category. Following is example of my database design: images +----------+-----+-------------+-----+ | image_id | ... | category_id | ... | +----------+-----+-------------+-----+ | 1 | ... | 11 | ... | +----------+-----+-------------+-----+ | 2 | ... | 12 | ... | +----------+-----+-------------+-----+ | 3 | ... | 11 | ... | +----------+-----+-------------+-----+ | 4 | ... | 11 | ... | +----------+-----+-------------+-----+ images_tags +----------+--------+ | image_id | tag_id | +----------+--------+ | 1 | 53 | +----------+--------+ | 3 | 54 | +----------+--------+ | 2 | 55 | +----------+--------+ | 1 | 56 | +----------+--------+ | 4 | 57 | +----------+--------+ tags and categories each have their own table relating the id to an actual name(text). So my question is how will i find out that images with category_id=11 have have the tag_id 53 54 55 56 57. In other words how to find the tags that images in certain category have?

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  • SQL Design Question regarding schema and if Name value pair is the best solution

    - by Aur
    I am having a small problem trying to decide on database schema for a current project. I am by no means a DBA. The application parses through a file based on user input and enters that data in the database. The number of fields that can be parsed is between 1 and 42 at the current moment. The current design of the database is entirely flat with there being 42 columns; some have repeated columns such as address1, address2, address3, etc... This says that I should normalize the data. However, data integrity is not needed at this moment and the way the data is shaped I'm looking at several joins. Not a bad thing but the data is still in a 1 to 1 relationship and I still see a lot of empty fields per row. So my concerns are that this does not allow the database or the application to be very extendable. If they want to add more fields to be parsed (which they do) than I'd need to create another table and add another foreign key to the linking table. The third option is I have a table where the fields are defined and a table for each record. So what I was thinking is to make a table that stores the value and then links to those two tables. The problem is I can picture the size of that table growing large depending on the input size. If someone gives me a file with 300,000 records than 300,000 x 40 = 12 million so I have some reservations. However I think if I get to that point than I should be happy it is being used. This option also allows for more custom displaying of information albeit a bit more work but little rework even if you add more fields. So the problem boils down to: 1. Current design is a flat file which makes extending it hard and it is not normalized. 2. Normalize the tables although no real benefits for the moment but requirements change. 3. Normalize it down into the name value pair and hope size doesn't hurt. There are a large number of inserts, updates, and selects against that table. So performance is a worry but I believe the saying is design now, performance testing later? I'm probably just missing something practical so any comments would be appreciated even if it’s a quick sanity check. Thank you for your time.

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  • SQL Profiles showing high activity

    - by Wong Chi
    I am running my application locally -- ie. No external traffic and very low number of queries, fully under my control. I see tons of 'Audit Login' and 'Audit Logout' events. What are these and where are they actually stored (ie. Where is this audit log)? Are these a hint of a problem with connections, because I have only a simple connection string within my app and thought that connections would remain active throughout the operation of my app (ie. a single login at launch, and then a single logout when terminating).

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  • Snapshot on, still deadlocks, ROWLOCK

    - by Patto
    I turned snapshot isolation on in my database using the following code ALTER DATABASE MyDatabase SET ALLOW_SNAPSHOT_ISOLATION ON ALTER DATABASE MyDatabase SET READ_COMMITTED_SNAPSHOT ON and got rid off lots of deadlocks. But my database still produces deadlocks, when I need to run a script every hour to clean up 100,000+ rows. Is there a way I can avoid deadlocks in my cleanup script, do I need to set ROWLOCK specifically in that query? Is there a way to increase the number of row level locks that a database uses? How are locks promoted? From row level to page level to table level? My delete script is rather simple: delete statvalue from statValue, (select dateadd(minute,-60, getdate()) as cutoff_date) cd where temporaryStat = 1 and entrydate < cutoff_date Right now I am looking for quick solution, but a long term solution would be even nicer. Thanks a lot, Patrikc

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  • Reset SQL variable inside SELECT statement

    - by Jason McCreary
    I am trying to number some rows on a bridge table with a single UPDATE/SELECT statement using a counter variable @row. For example: UPDATE teamrank JOIN (SELECT @row := @row + 1 AS position, name FROM members) USING(teamID, memberID) SET rank = position Is something like this possible or do I need to create a cursor? If it helps, I am using MySQL 5.

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  • How to get only the date from the sql server

    - by Pradeep
    this is what i want. but i have put only a specified date. SELECT BookName, Author, BookPrice FROM Book WHERE Book.Book_ID = ( SELECT Book_ID FROM Temp_Order WHERE Temp_Order.User_ID = 25 AND Temp_Order.OrderDate='3/24/2010' ) this is the date function i used. but it takes the time also. how to stop it. please help me SELECT Book_ID, BookName,Author,BookPrice FROM Book INNER JOIN FavCategory ON Book.Category_ID = FavCategory.Category_ID WHERE FavCategory.User_ID = " + useridlabel.Text + " AND OrderDate = **GETDATE()**

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