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  • LINQ2SQL: orderby note.hasChildren(), name ascending

    - by Peter Bridger
    I have a hierarchical data structure which I'm displaying in a webpage as a treeview. I want to data to be ordered to first show nodes ordered alphabetically which have no children, then under these nodes ordered alphabetically which have children. Currently I'm ordering all nodes in one group, which means nodes with children appear next to nodes with no children. I'm using a recursive method to build up the treeview, which has this LINQ code at it's heart: var filteredCategory = from c in category orderby c.Name ascending where c.ParentCategoryId == parentCategoryId && c.Active == true select c; So this is the orderby statement I want to enhance. Shown below is the database table structure: [dbo].[Category]( [CategoryId] [int] IDENTITY(1,1) NOT NULL, [Name] [varchar](100) NOT NULL, [Level] [tinyint] NOT NULL, [ParentCategoryId] [int] NOT NULL, [Selectable] [bit] NOT NULL CONSTRAINT [DF_Category_Selectable] DEFAULT ((1)), [Active] [bit] NOT NULL CONSTRAINT [DF_Category_Active] DEFAULT ((1))

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  • Custom Grid LINQ to SQL help

    - by user488361
    Following is my custome cotrol grid... public partial class LinqGrid : UserControl { object tmpDataTable = new object(); public LinqGrid() { InitializeComponent(); } public void Bind(System.Data.Linq.Table listSource) where T : class { Project.dbClassesDataContext dbc = new Project.dbClassesDataContext(); tmpDataTable = listSource; var query = (from c in listSource select c); dgvRecords.DataSource = query.Take(10).ToList(); } private void btnNext_Click(object sender, EventArgs e) { // now what i have to do here if i want next 10 records.....means how to retrive tmpDataTable object here... ??? i can't find Type of variable....?? plz help me.... } }

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  • Nesting queries in SQL

    - by ZAX
    The goal of my query is to return the country name and its head of state if it's headofstate has a name starting with A, and the capital of the country has greater than 100,000 people utilizing a nested query. Here is my query: SELECT country.name as country, (SELECT country.headofstate from country where country.headofstate like 'A%') from country, city where city.population > 100000; I've tried reversing it, placing it in the where clause etc. I don't get nested queries. I'm just getting errors back, like subquery returns more than one row and such. If someone could help me out with how to order it, and explain why it needs to be a certain way, that'd be great.

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  • Oracle SQL Update query takes days to update

    - by B Senthil Kumar
    I am trying to update a record in the target table based on the record coming in from source. For instance, if the incoming record is present in the target table I would update them in the target else I would simply insert. I have over one million records in my source while my target has 46 million records. The target table is partitioned based on calendar key. I implement this whole logic using Informatica. I find that the Informatica code is perfectly fine looking at the Informatica session log but its in the update it takes long time (more than 5 days to update one million records). Any suggestions as to what can be done on the scenario to improve the performance?

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  • SQL Structure of DB table with different types of columns

    - by Dmitry Dvornikov
    I have a problem with the optimization of the structure of the database. I'll try to explain it exactly. I create a project, where we can add different values??, but this values must have different types of the columns in the database (eg, int, double , varchar). What is the best way to store the different types of values ??in the database. In the project I'm using Propel 1.6. The point is availability to add value with 'int', 'varchar' and other columns types, to search the table was efficient. In total, I have two ideas. The first is to create a table of "value", which will have columns: "id ", "value_int", "value_double", "value_varchar", etc - with the corresponding column types. Depending on the type of values??, records will be saved with the value in the appropriate column (the rest will be NULL). The second solution is to create separate tables such as "value_int", "value_varchar" etc. There would be columns: "id", "value", which correspond to the relevant types of "value" (ie, such as int, varchar, etc). I must admit that I do not believe any of the above solutions, originally I was thinking about one table "value", where the column would be a "text" type - but this solution would probably be even worse. I would like to know your opinion on this topic, maybe something else would be better. Thanks in advance. EDIT: For example : We have three tables: USER: [table of users] * id * name FIELD: [table of profile fields - where the column 'type' is the type of field, eg int or varchar) * id * type * name VALUE : * id * User_id - ( FK user.id ) * Field_id - ( FK field.id ) * value So we have in each row an user in USER table, and the profile is stored in the VALUE table. Bit each profile field may have a different type (column 'type' in the FIELD table), and based on that I would want this value to add to the appropriate column of the appropriate type.

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  • Update table without using cursor and on date

    - by Muhammad Kashif Nadeem
    Please copy and run following script DECLARE @Customers TABLE (CustomerId INT) DECLARE @Orders TABLE ( OrderId INT, CustomerId INT, OrderDate DATETIME ) DECLARE @Calls TABLE (CallId INT, CallTime DATETIME, CallToId INT, OrderId INT) ----------------------------------------------------------------- INSERT INTO @Customers SELECT 1 INSERT INTO @Customers SELECT 2 ----------------------------------------------------------------- INSERT INTO @Orders SELECT 10, 1, DATEADD(d, -20, GETDATE()) INSERT INTO @Orders SELECT 11, 1, DATEADD(d, -10, GETDATE()) ----------------------------------------------------------------- INSERT INTO @Calls SELECT 101, DATEADD(d, -19, GETDATE()), 1, NULL INSERT INTO @Calls SELECT 102, DATEADD(d, -17, GETDATE()), 1, NULL INSERT INTO @Calls SELECT 103, DATEADD(d, -9, GETDATE()), 1, NULL INSERT INTO @Calls SELECT 104, DATEADD(d, -6, GETDATE()), 1, NULL INSERT INTO @Calls SELECT 105, DATEADD(d, -5, GETDATE()), 1, NULL ----------------------------------------------------------------- I want to update @Calls table and need following results. I am using the following query UPDATE @Calls SET OrderId = ( CASE WHEN (s.CallTime > e.OrderDate) THEN e.OrderId END ) FROM @Calls s INNER JOIN @Orders e ON s.CallToId = e.CustomerId and the result of my query is not what I need. Requirement: As you can see there are two orders. One is on 2010-12-12 and one is on 2010-12-22. I want to update @Calls table with relevant OrderId with respect to CallTime. In short If subsequent Orders are added, and there are further calls then we assume that a new call is associated with the most recent Order Note: This is sample data so this is not the case that I always have two Orders. There might be 10+ Orders and 100+ calls. Note2 I could not find good title for this question. Please change it if you think of any better. Thanks.

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  • Multiple conditions on select query

    - by stats101
    I have a select statement and I wish to calculate the cubic volume based on other values within the table. However I want to check that neither pr.Length_mm or pr.Width_mm or pr.Height_mm are NULL prior. I've looked at CASE statements, however it only seems to evaluate one column at a time. SELECT sa.OrderName, sa.OrderType, pr.Volume_UOM ,pr.Length_mm*pr.Width_mm*pr.Height_mm AS Volume_Cubic ,pr.Length_mm*pr.Width_mm AS Volume_Floor ,pr.Length_mm ,pr.Height_mm ,pr.Width_mm FROM CostToServe_MCB.staging.Sale sa LEFT JOIN staging.Product pr ON sa.ID = pr.ID

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  • Mysql SQL join question

    - by David
    I am trying to find all deals information along with how many comments they have received. My query select deals.*, count(comments.comments_id) as counts from deals left join comments on comments.deal_id=deals.deal_id where cancelled='N' But now it only shows the deals that have at least one comment. What is the problem?

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  • Is it a good idea to use a computed column as part of a primary key ?

    - by Brann
    I've got a table defined as : OrderID bigint NOT NULL, IDA varchar(50) NULL, IDB bigint NULL, [ ... 50 other non relevant columns ...] The natural primary key for this table would be (OrderID,IDA,IDB), but this it not possible because IDA and IDB can be null (they can both be null, but they are never both defined at the same time). Right now I've got a unique constraint on those 3 columns. Now, the thing is I need a primary key to enable transactional replication, and I'm faced with two choices : Create an identity column and use it as a primary key Create a non-null computed column C containing either IDA or IDB or '' if both columns were null, and use (OrderID,C) as my primary key. The second alternative seams cleaner as my PK would be meaningful, and is feasible (see msdn link), but since I've never seen this done anywhere, I was wondering if they were some cons to this approach.

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  • SQL Update to the SUM of its joined values

    - by CL4NCY
    Hi, I'm trying to update a field in the database to the sum of its joined values: UPDATE P SET extrasPrice = SUM(E.price) FROM dbo.BookingPitchExtras AS E INNER JOIN dbo.BookingPitches AS P ON E.pitchID = P.ID AND P.bookingID = 1 WHERE E.[required] = 1 When I run this I get the following error: "An aggregate may not appear in the set list of an UPDATE statement." Any ideas?

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  • TSQL, select values from large many-to-many relationship

    - by eugeneK
    I have two tables Publishers and Campaigns, both have similar many-to-many relationships with Countries,Regions,Languages and Categories. more info Publisher2Categories has publisherID and categoryID which are foreign keys to publisherID in Publishers and categoryID in Categories which are identity columns. On other side i have Campaigns2Categories with campaignID and categoryID columns which are foreign keys to campaignID in Campaigns and categoryID in Categories which again are identities. Same goes for Regions, Languages and Countries relationships I pass to query certain publisherID and want to get campaignIDs of Campaigns that have at least one equal to Publisher value from regions, countries, language or categories thanks

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  • SQL Agent Job - to execute as queue

    - by BINEESHTHOMAS
    I have a job which is calling 10 other jobs using sp_start_job. The job is having 10 steps, each step calling each sub jobs, When i execute the main job, i can see it started with step 1 and in a few secods it shows 'finished successfully' But the jobs take long time time, and when i see the log mechanism i have put inside , it shows the all the 10 steps are running simultaniously at the back, till it finishes after few hours. My requirement is, it should finish step 1 first and then only step2 should start. aNY HELP PLS ?

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  • Help with Oracle SQL Count function! =)

    - by user363024
    Hi guys.. The question im struggling with is this: i have a list of helicopter names in different charters and i need to find out WHICH helicopter has the least amount of charters booked. Once i find that out i need to ONLY display the one that has the least. I so far have this: SELECT Helicopter_Name COUNT (Distinct Charter_NUM) FROM Charter_Table GROUP BY Helicopter Name ^ this is where i am stuck, i realise MIN could be used to pick out the value that is the smallest but i am not sure how to integrate this into the command. Something like Where MIN = MIN Value Id really appreciate it

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  • SQL: Find the max record per group

    - by user319088
    I have one table, which has three fields and data. Name , Top , Total cat , 1 , 10 dog , 2 , 7 cat , 3 , 20 horse , 4 , 4 cat , 5 , 10 dog , 6 , 9 I want to select the record which has highest value of Total for each Name, so my result should be like this: Name , Top , Total cat , 3 , 20 horse , 4 , 4 Dog , 6 , 9 I tried group by name order by total, but it give top most record of group by result. Can anyone guide me, please?

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  • SQL timetable for employee

    - by latinunit-net
    Hi guys, i need to create an employee shift database. so i have 3 tables so far, employee, employee_shift, and shift im suppose to calculate how many shifts an employee has done at the end of the month, my question means, because a month has 30 days some have 28 and 31 days. this means i need to create in the shift table 31 different variations? one for each day of the month? in order to calculate which employee has worked the most? in my business relation it says an employee has either 1 or 2 shifts per day therefore do i have to have 60 different rows of variations? im i right or is there an easy way to work it out

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  • BULK INSERT from one table to another all on the server

    - by steve_d
    I have to copy a bunch of data from one database table into another. I can't use SELECT ... INTO because one of the columns is an identity column. Also, I have some changes to make to the schema. I was able to use the export data wizard to create an SSIS package, which I then edited in Visual Studio 2005 to make the changes desired and whatnot. It's certainly faster than an INSERT INTO, but it seems silly to me to download the data to a different computer just to upload it back again. (Assuming that I am correct that that's what the SSIS package is doing). Is there an equivalent to BULK INSERT that runs directly on the server, allows keeping identity values, and pulls data from a table? (as far as I can tell, BULK INSERT can only pull data from a file) Edit: I do know about IDENTITY_INSERT, but because there is a fair amount of data involved, INSERT INTO ... SELECT is kinda of slow. SSIS/BULK INSERT dumps the data into the table without regards to indexes and logging and whatnot, so it's faster. (Of course creating the clustered index on the table once it's populated is not fast, but it's still faster than the INSERT INTO...SELECT that I tried in my first attempt) Edit 2: The schema changes include (but are not limited to) the following: 1. Splitting one table into two new tables. In the future each will have its own IDENTITY column, but for the migration I think it will be simplest to use the identity from the original table as the identity for the both new tables. Once the migration is over one of the tables will have a one-to-many relationship to the other. 2. Moving columns from one table to another. 3. Deleting some cross reference tables that only cross referenced 1-to-1. Instead the reference will be a foreign key in one of the two tables. 4. Some new columns will be created with default values. 5. Some tables aren’t changing at all, but I have to copy them over due to the "put it all in a new DB" request.

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  • how to insert based on the date

    - by Gaolai Peng
    I have a table table1 (account, last_contact_date, insert_date), account and last_contact_date are primary keys. The insert_date is set with the time the recored being added by calling getdate(). I also have a temporary table #temp(account, last_contact_date) which I use to update the table1. Here are sample data: table1 account last_contact_date insert_date 1 2012-09-01 2012-09-28 2 2012-09-01 2012-09-28 3 2012-09-01 2012-09-28 #temp account last_contact_date 1 2012-09-27 2 2012-09-27 3 2012-08-01 The result table depends on the inserting date. If the date is 2012-09-28, the result will be table1 account last_contact_date insert_date 1 2012-09-27 2012-09-28 2 2012-09-27 2012-09-28 3 2012-09-01 2012-09-28 If the date is 2012-09-29, the result will be table1 account last_contact_date insert_date 1 2012-09-01 2012-09-28 2 2012-09-01 2012-09-28 3 2012-09-01 2012-09-28 1 2012-09-27 2012-09-29 2 2012-09-27 2012-09-29 Basically the rule is (1) if the inserting date is the same day, i will pick the lastest last_contact_date, otherwise, (2) if the last_contact_date is later than the current last_contact_date, I will insert a new one. How do I write a query for this insert?

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  • IF statement error

    - by Jasl
    I have the following columns in TableA TableA Column1 varchar Column2 int Column3 bit I am using this statement IF Column3 = 0 SELECT Column1, Column2 FROM TableA WHERE Column2 > 200 ELSE SELECT Column1, Column2 FROM TableA WHERE Column2 < 200 But the statment does not compile. It says Invalid Column Name 'Column3'

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  • MSSql Query solution cum Suggestion Required

    - by Nirmal
    Hello All... I have a following scenario in my MSSql 2005 database. zipcodes table has following fields and value (just a sample): zipcode latitude longitude ------- -------- --------- 65201 123.456 456.789 65203 126.546 444.444 and "place" table has following fields and value : id name zip latitude longitude -- ---- --- -------- --------- 1 abc 65201 NULL NULL 2 def 65202 NULL NULL 3 ghi 65203 NULL NULL 4 jkl 65204 NULL NULL Now, my requirement is like I want to compare my zip codes of "place" table and update the available latitude and longitude fields from "zipcode" table. And there are some of the zipcodes which has no entry in "zipcode" table, so that should remain null. And the major issue is like I have more then 50,00,000 records in my db. So, query should support this feature. I have tried some of the solutions but unfortunately not getting proper output. Any help would be appreciated...

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