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• Question about inserting/updating rows with SQL Server (ASP.NET MVC)

  - by Alex

  I have a very big table with a lot of rows, every row has stats for every user for certain days. And obviously I don't have any stats for future. So to update the stats I use UPDATE Stats SET Visits=@val WHERE ... a lot of conditions ... AND Date=@Today But what if the row doesn't exist? I'd have to use INSERT INTO Stats (...) VALUES (Visits=@val, ..., Date=@Today) How can I check if the row exists or not? Is there any way different from doing the COUNT(*)? If I fill the table with empty cells, it'd take hundreds of thousands of rows taking megabytes and storing no data.

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• SQL SELECT INSERTed data from Table

  - by Noam Smadja

  its in ASP Classic. MS-Access DB. i do: INSERT INTO Orders (userId) VALUES (123)" what i want to retrieve is orderNumber from that row. its an auto-increment number. so i did: SELECT orderNumber FROM Orders WHERE userId=123 but since it is on the same page, the SELECT returns: Either BOF or EOF is True, or the current record has been deleted. Requested operation requires a current record. i've seen somewhere RETURNING orderNumber as variable but it was for oracle and i dont know how to implement it into my asp :( set addOrder = Server.CreateObject("ADODB.Command") addOrder.ActiveConnection = MM_KerenDB_STRING addOrder.CommandText = "INSERT INTO Orders (userId) VALUES ("&userId&")" addOrder.CommandType = 1 addOrder.CommandTimeout = 0 addOrder.Prepared = true addOrder.Execute() Dim getOrderNumber Set getOrderNumber = Server.CreateObject("ADODB.Recordset") getOrderNumber.ActiveConnection = MM_KerenDB_STRING getOrderNumber.Source = "SELECT orderNumber FROM Orders WHERE userId=" & userId getOrderNumber.CursorType = 0 getOrderNumber.CursorLocation = 2 getOrderNumber.LockType = 1 getOrderNumber.Open() session("orderNumber") = getOrderNumber.Fields.Item("orderNumber").value

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• Check constraint on table lookup

  - by bzamfir

  Hi, I have a table, department , with several bit fields to indicate department types One is Warehouse (when true, indicate the department is warehouse) And I have another table, ManagersForWarehouses with following structure: ID autoinc WarehouseID int (foreign key reference DepartmentID from departments) ManagerID int (foreign key reference EmployeeID from employees) StartDate EndDate To set new manager for warehouse, I insert in this table with EndDate null, and I have a trigger that sets EndDate for previous record for that warehouse = StartDate for new manager, so a single manager appears for a warehouse at a certain time. I want to add two check constraints as follows, but not sure how to do this do not allow to insert into ManagersForWarehouses if WarehouseID is not marked as warehouse Do not allow to uncheck Warehouse if there are records in ManagersForWarehouses Thanks

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• Why does this properly escaped SQL query fail?

  - by Jason Rhodes

  Here's the query: INSERT INTO jobemails (jobid, to, subject, message, headers, datesent) VALUES ('340', '[email protected]', 'We\'ve received your request for a photo shoot called \'another\'.', 'message', 'headers', '2010-04-22 15:55:06') The datatypes are all correct, it always fails at the subject, so it must be how I'm escaping the values, I assume. I'm sure one of you will see my idiot mistake right away. A little help?

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• Insert Into Two SQL Tables From XML Maintaining Relationship

  - by Thx

  I am looking to insert records from xml into two different tables. For example <Root> <A> <AValue>1</AValue> <Children> <B> <BValue>2</BValue> </B> </Children> </A> </Root> Would insert a record into table A AID AValue # 1 also insert a record into table B BID AID BValue # #(Same as AID Above) 2 I have this DECLARE @idoc INT DECLARE @doc NVARCHAR(MAX) SET @doc = ' <Root> <A> <AValue>1</AValue> <Children> <B> <BValue>2</BValue> </B> </Children> </A> </Root> ' EXEC sp_xml_preparedocument @idoc OUTPUT, @doc CREATE TABLE #A ( AID INT IDENTITY(1, 1) , AValue INT ) INSERT INTO #A SELECT * FROM OPENXML (@idoc, '/Root/A',2) WITH (AValue INT ) CREATE TABLE #B ( BID INT IDENTITY(1, 1) , AID INT , BValue INT ) INSERT INTO #B SELECT * FROM OPENXML (@idoc, '/Root/A/Children/B',2) WITH ( AID INT, BValue INT ) SELECT * FROM #A SELECT * FROM #B DROP TABLE #A DROP TABLE #B Thanks!

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• Aggregate SQL column values by time period

  - by user305688

  I have some numerical data that comes in every 5 minutes (i.e. 288 values per day, and quite a few days worth of data). I need to write a query that can return the sums of all values for each day. So currently the table looks like this: 03/30/2010 00:01:00 -- 553 03/30/2010 00:06:00 -- 558 03/30/2010 00:11:00 -- 565 03/30/2010 00:16:00 -- 565 03/30/2010 00:21:00 -- 558 03/30/2010 00:26:00 -- 566 03/30/2010 00:31:00 -- 553 ... And this goes on for 'x' number of days, I'd like the query to return 'x' number of rows, each of which containing the sum of all the values on each day. Something like this: 03/30/2010 -- <sum> 03/31/2010 -- <sum> 04/01/2010 -- <sum> The query will go inside a Dundas webpart, so unfortunately I can't write custom user functions to assist it. All the logic needs to be in just the one big query. Any help would be appreciated, thanks. I'm trying to get it to work using GROUP BY and DATEPART at the moment, not sure if it's the right way to go about it.

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• SQL: Limit rows linked to each joined row

  - by SolidSnakeGTI

  Hello, I've certain situation that requires certain result set from MySQL query, let's see the current query first & then ask my question: SELECT thread.dateline AS tdateline, post.dateline AS pdateline, MIN(post.dateline) FROM thread AS thread LEFT JOIN post AS post ON(thread.threadid = post.threadid) LEFT JOIN forum AS forum ON(thread.forumid = forum.forumid) WHERE post.postid != thread.firstpostid AND thread.open = 1 AND thread.visible = 1 AND thread.replycount >= 1 AND post.visible = 1 AND (forum.options & 1) AND (forum.options & 2) AND (forum.options & 4) AND forum.forumid IN(1,2,3) GROUP BY post.threadid ORDER BY tdateline DESC, pdateline ASC As you can see, mainly I need to select dateline of threads from 'thread' table, in addition to dateline of the second post of each thread, that's all under the conditions you see in the WHERE CLAUSE. Since each thread has many posts, and I need only one result per thread, I've used GROUP BY CLAUSE for that purpose. This query will return only one post's dateline with it's related unique thread. My questions are: How to limit returned threads per each forum!? Suppose I need only 5 threads -as a maximum- to be returned for each forum declared in the WHERE CLAUSE 'forum.forumid IN(1,2,3)', how can this be achieved. Is there any recommendations for optimizing this query (of course after solving the first point)? Notes: I prefer not to use sub-queries, but if it's the only solution available I'll accept it. Double queries not recommended. I'm sure there's a smart solution for this situation. I'm using MySQL 4.1+, but if you know the answer for another engine, just share. Appreciated advice in advance :)

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• How to enumerate returned rows in SQL?

  - by SilentGhost

  I was wondering if it would be possible to enumerate returned rows. Not according to any column content but just yielding a sequential integer index. E.g. select ?, count(*) as usercount from users group by age would return something along the lines: 1 12 2 78 3 4 4 42

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• SQL - Conditionally evaluate WHERE clauses

  - by Crimius

  I need to get a WHERE clause to only evaluate certain statements. something like: WHERE field_a = field_b AND (CASE WHEN <PARAM>type</PARAM> = 5 THEN {field_c = 1 OR field_c = 2} WHEN <PARAM>type</PARAM> = 6 THEN {field_c = 3 OR field_c = 4} ELSE field_c = <PARAM>type</PARAM> so that when the Param type = 5, it only checks if field_c = 1 or 2. Any thoughts?

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• Saving Double.MinValue in SQLServer

  - by PatrickL

  Using a TSQL update command against a SQLServer database, how can I update a column of type FLOAT with the smallest possible double value? The smallest possible double value in hex notation being 3ff0 0000 0000 0001 (http://en.wikipedia.org/wiki/Double%5Fprecision)

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• SQL is this equivalent to a LEFT JoIn?

  - by Jim

  Is this equivalent to a LEFT JOIN? SELECT DISTINCT a.name, b.name FROM tableA a, (SELECT DISTINCT name FROM tableB) as b It seems as though there is no link between the two tables. Is there an easier / more efficient way to write this?

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• sql select from a large number of IDs

  - by Claudiu

  I have a table, Foo. I run a query on Foo to get the ids from a subset of Foo. I then want to run a more complicated set of queries, but only on those IDs. Is there an efficient way to do this? The best I can think of is creating a query such as: SELECT ... --complicated stuff WHERE ... --more stuff AND id IN (1, 2, 3, 9, 413, 4324, ..., 939393) That is, I construct a huge "IN" clause. Is this efficient? Is there a more efficient way of doing this, or is the only way to JOIN with the inital query that gets the IDs? If it helps, I'm using SQLObject to connect to a PostgreSQL database, and I have access to the cursor that executed the query to get all the IDs.

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• Union and order by

  - by David Lively

  Consider a table like tbl_ranks -------------------------------- family_id | item_id | view_count -------------------------------- 1 10 101 1 11 112 1 13 109 2 21 101 2 22 112 2 23 109 3 30 101 3 31 112 3 33 109 4 40 101 4 51 112 4 63 109 5 80 101 5 81 112 5 88 109 I need to generate a result set with the top two(2) rows for a subset of family ids (say, 1,2,3 and 4) ordered by view count. I'd like to do something like select top 2 * from tbl_ranks where family_id = 1 order by view_count union all select top 2 * from tbl_ranks where family_id = 2 order by view_count union all select top 2 * from tbl_ranks where family_id = 3 order by view_count union all select top 2 * from tbl_ranks where family_id = 4 order by view_count but, of course, order by isn't valid in a union all context in this manner. Any suggestions? I know I could run a set of 4 queries, store the results into a temp table and select the contents of that temp as the final result, but I'd rather avoid using a temp table if possible. Note: in the real app, the number of records per family id is indeterminate, and the view_counts are also not fixed as they appear in the above example.

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• What is wrong with this SQL syntax?

  - by Finbarr

  UPDATE files SET filepath = REPLACE(filepath, `sites/somedomain.com/files/`, `sites/someotherdomain.com/files/`); I have a table called files with a field called filepath. MySQL returns this error: Unknown column 'sites/somedomain.com/files/' in 'field list'

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• SQL Reporting Services: Finding the folder a report is in

  - by Bob

  Hi there, If I have the report name how can I programmatically get the name of the project/folder the report is in? So for example if I have a report like so http://server/Reports/Pages/Report.aspx?ItemPath=/ReportProject1/ReportName Given "ReportName" how can I figure out that the report is in the folder "ReportProject1"? So I guess is there a function where I can pass int he report name and get it's details or else query the report server for a list of its report folders and I can loop through these and check some how that the report is inside?

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• What is wrong with this simple update query?

  - by Kyle Noland

  I get no error message, but the row is not updated. The rows integer is set 1 following the query, indicating that 1 row was affected. String query = "UPDATE contacts SET contact_name = '" + ContactName.Text.Trim() + "', " + "contact_phone = '" + Phone.Text.Trim() + "', " + "contact_fax = '" + Fax.Text.Trim() + "', " + "contact_direct = '" + Direct.Text.Trim() + "', " + "company_id = '" + Company.SelectedValue + "', " + "contact_address1 = '" + Address1.Text.Trim() + "', " + "contact_address2 = '" + Address2.Text.Trim() + "', " + "contact_city = '" + City.Text.Trim() + "', " + "contact_state = '" + State.SelectedValue + "', " + "contact_zip = '" + Zip.Text.Trim() + "' " + "WHERE contact_id = '" + contact_id + "'"; String cs = Lib.GetConnectionString(null); SqlConnection conn = new SqlConnection(cs); SqlCommand cmd = conn.CreateCommand(); cmd.CommandText = query; cmd.Connection.Open(); int rows = cmd.ExecuteNonQuery();

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• linq2sql left join with "multiselect"

  - by just_azho

  Hi, folks I'm trying to achieve following by linq2sql, but not successful. I've Member and Reference tables. DB is design in such a manner that Member can have multiple (=0) References. What I want as a result of query is, list (rows) of members, where all references of the member are "collected" in one column. What I had achieved is following query, but for this one there exist a row for each Reference. var refs = (from m in db.Members join r in db.References on m.PID equals r.PID into g from o in g.DefaultIfEmpty() select new { member = m, name = (o == null ? "" : o.NameSurname) }); I feel I need to insert SelectMany somewher :) Could you please give hints on achieving the goal?

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• Microsoft SQL Server 2005 time of day data type

  - by Kevin

  Is there a data type which represents time of day? Such as a datetime data type without the date.

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• how to enforce multiple unique fields in database table

  - by oo

  i have a table called Cars and the primary key of the table is 'id'. I also have a field called 'name'. I would like to make sure no one enters the same name twice even though it wont break my db integrity. what is the best way of doing this?

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• problem with sql statement using vb.net

  - by newBie

  hi i got some problem i got this 3 line statement: Dim infoID As Integer = objCommand1.ExecuteScalar() Dim strSQL2 As String = "insert into feedBackHotel (infoID, feedBackView) values(" + infoID + ",'" + FeedBack + "')" Dim objCommand2 As New SqlCommand(strSQL2, conn) objCommand2.ExecuteNonQuery() the problem here is..the strSQL2 can capture the infoID from previous statement, but it didnt insert into the database. it will pop out this error "Conversion from string "insert into feedBackHotel (infoI" to type 'Double' is not valid." in both table related, use same data type (int) but for the feedBackHotel's infoID i allow it to be null..bcoz if i make it not null, it will show another error.. im using vb.net ..can anyone help?

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• subqueries in UPDATE SET (sql server 2005)

  - by itdebeloper

  I have a question about using subqueries in an Update statement. My example: UPDATE TRIPS SET locations = city + ', ' FROM (select Distinct city from poi where poi.trip_guid = trips.guid) Is it possible to refer to main table value (trips.guid) in subqueries? When i try to use trips.guid I get the error: "The multi-part identifier "trips.guid" could not be bound."

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• Value is zero after filter SQL in C#

  - by Chuki2

  I`m new in C#.. I have write function to filter department. And this function will return idDepartment. New problem is, department keep value "System.Windows.Forms.Label, Text : ADMIN ", that`s why i got zero. So how can i take "ADMIN" only and keep to department? Update : public partial class frmEditStaff : Form { private string connString; private string userId, department; //Department parameter coming from here private string conString = "Datasource"; public frmEditStaff(string strUserID, string strPosition) { InitializeComponent(); //Pass value from frmListStaff to userID text box tbStaffId.Text = strUserID.ToString(); userId = strUserID.ToString(); department = strPosition.ToString(); } This code below is working, don`t have any problem. public int lookUpDepart() { int idDepart=0; using (SqlConnection openCon = new SqlConnection(conString)) { string lookUpDepartmenId = "SELECT idDepartment FROM tbl_department WHERE department = '" + department + "';"; openCon.Open(); using (SqlCommand querylookUpDepartmenId = new SqlCommand(lookUpDepartmenId, openCon)) { SqlDataReader read = querylookUpDepartmenId.ExecuteReader(); while (read.Read()) { idDepart = int.Parse(read[0].ToString()); break; } } openCon.Close(); return idDepart; } } Thanks for help. Happy nice day!

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• Stored Procedure, 'incorrect syntax error'

  - by jacksonSD

  Attempting to figure out sp's, and I'm getting this error: "Msg 156, Level 15, State 1, Line 5 Incorrect syntax near the keyword 'Procedure'." the error seems to be on the if, but I can drop other existing tables with stored procedures the exact same way so I'm not clear on why this isn't working. can anyone shed some light? Begin Set nocount on Begin Try Create Procedure uspRecycle as if OBJECT_ID('Recycle') is not null Drop Table Recycle create table Recycle (RecycleID integer constraint PK_integer primary key, RecycleType nchar(10) not null, RecycleDescription nvarchar(100) null) insert into Recycle (RecycleID,RecycleType,RecycleDescription) values ('1','Compost','Product is compostable, instructions included in packaging') insert into Recycle (RecycleID,RecycleType,RecycleDescription) values ('2','Return','Product is returnable to company for 100% reuse') insert into Recycle (RecycleID,RecycleType,RecycleDescription) values ('3','Scrap','Product is returnable and will be reclaimed and reprocessed') insert into Recycle (RecycleID,RecycleType,RecycleDescription) values ('4','None','Product is not recycleable') End Try Begin Catch DECLARE @ErrMsg nvarchar(4000); SELECT @ErrMsg = ERROR_MESSAGE(); Throw 50001, @ErrMsg, 1; End Catch -- checking to see if table exists and is loaded: If (Select count(*) from Recycle) >1 begin Print 'Recycle table created and loaded '; Print getdate() End set nocount off End

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• SQL and/or LINQ query for determining daily increases in viewers

  - by Gio

  We're montioring usage of a certain resources by monitoring users logins (We can see user logins growing daily). After filtering out repeat inter day logins for users, we'd like to track the # of users using the service each day, and then using that info to determine overall incremental gains for each calendar day. Our table is pretty simple: class ServiceLogin { String login; DateTime loginTime; }

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• One-to-many relationship related to many tables

  - by Andrey

  I have a scenario where: there are two (or more) tables that represent independent items. lets say Users and Companies Both of these tables need addresses stored. Each one can have one or more address In a normal 1 to many scenario Addresses table woudl just have a UserId or a CompanyId creating a normal 1 to many relationship. In this case i have a few approaches i can think of the Addresses table could have both a UserId and a CompanyId and only one would be used for each record. 2 keys could be used ObjectId and ObjectType So Object id would have a UserId or a CompanyId, and ObjectType woudl be User or Company Create an ObjectTable and add ObjectId to Users and Companies. Addresses would then have an OjbectId I do not really like any of these solutions. i am wondering what is the best approach here. On another note i will most likely user linqtosql for my data access layer.

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