Multiple Tables, Inserts, Identity Columns And Database Integrity
Apr 30, 2008
Hi all,
I am writing a portion of an app that is of intensely high online eCommerce usage. I have a question about identity columns and locking or not.
What I am doing is, I have two tables (normalized), one is OrderDemographics(firstname,lastname,ccum,etc) the other is OrderItems. I have the primary key of OrderDemographics as a column called 'ID' (an Identity Integer that is incrementing). In the OrderItems table, the 'OrderID' column is a foreign key to the OrderDemographics Primary Key column 'ID'.
What I have previously done is to insert the demographics into OrderDemographics, then do a 'select top 1 ID from OrderDemographics order by ID DESC' to get that last ID, since you can't tell what it is until you add another row....
The problem is, there's up to 20,000 users/sessions at once and there is a possiblity that in the fraction of a second it takes to select back that ID integer and use it for the initial OrderItems row, some other user might have clicked 'order' a fraction of a second after the first user and created another row in OrderDemographics, thus incrementing the ID column and throwing all the items that Customer #1 orders into Customer #2's order....
How do I lock a SQL table or lock the Application in .NET to handle this problem and keep it from occurring?
I have a Problem with my SQL Statement.I try to insert different Columns from different Tables into one new Table. Unfortunately my Statement doesn't do this.
If object_ID(N'Bezeichnungen') is not NULL Drop table Bezeichnungen; GO create table Bezeichnungen ( Artikelnummer nvarchar(18), Artikelbezeichnung nvarchar(80), Artikelgruppe nvarchar(13),
Iam in a situtation where i have a query Which Inserts into a table from Select statement. But there is another table which is dependent on the Primay key of the inserted table. Since the insert is multiple iam not able to use the @@Identity. Can some one suggest me How can i over come this situtation. Also Triggers cant be used as the the records are of huge numbers.
Eg:- INSERT INTO Users (FirstName, SecondName) SELECT FirstName, SecondName From Old_Users
INSERT INTO UserDependent(UserID,OtherFields) VALUES(@@Identity,'SomeOtherValue')
I have transaction table where the rows entered into the transactioncan come a result of changes that take place if four different tables.So the situation is as follows:Transaction Table-TranId-Calc AmountTable 1 (the amount is inserted into the transaction table)- Tb1Id- Tb1AmtTable 2 (an amount is calculated based on the percentage and insertedinto the transaction table)-Tbl2Id-Tb2PercentageTable 3 (the amount is inserted into the transaction table)-Tbl3Id-Tbl3AmutTable 4 (an amount is calculated based on the percentage and insertedinto the transaction table. )-Tbl2Id-Tb2PercentageHow do I create referential integrity between the Transaction table andthe rest of the tables. When I make changes to the values in Table 1 -4, I need to be able to reflect this in the Transaction table.Thanks.
Since most use SQL server, I thought I would post the question here.Is it possible, or is there a product or DBMS that enforces referential integrity across multiple databases and database types? Such as SQL Server, Oracle, etc...Thanks,Zath
Using SQL Server Express 2005, I have two databases. AppDB - The main application database.GeoDB - A somewhat static ZIP code / states / other geographic stuff databaseI need to have some foreign key columns in tables in AppDB reference columns in the GeoDB database tables. Eventually other application database besides AppDB will be doing the same thing in our infrastructure. After googling and reading for days, here is what I think I know:You cannot create foreign keys that reference tables in another database in SQL Server.You cannot create foreign keys that reference columns in a view, and you definitely cannot make an index on a view that has base tables in another database.You can create a trigger that references tables in another database, but this can be flaky? (nested/recursive trigger problem).SQLServer 2005 supports multiple schemas within the same database. Maybe I should logically separate my databases this way? Seems like it would be a tough solution to manage since I already have some databases live in production that will eventually use this 'static' GeoDB. Also, seems like it wouldn't be as portable as keeping the GeoDB info in its own database, but maybe I'm being too software engineer-ish here - afraid of low cohesion, high coupling.I will greatly appreciate any advice I can get, or any more options I am missing. Thanks,Adam Nofsingerucnmedia.com
I'm developing an ETL solution that needs to look for duplicate records using a fuzzy lookup. If the lookup table has an identity column, I get the following error. I can get this to work on a local desktop instance of SQL server, but not on my development server or production box. Any help is greatly appreciated.
Also I've stripped down the incoming data for the lookup to a very simplified version of what I'd like to use, but if I can't get it to work then I can't add addtional columns to match with.
It's like it's trying to add it's own Id to the temp table created for the tokens
An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80040E14 Description: "Multiple identity columns specified for table '##FLRef_070403_10:09:36_3532_aeac56a4-8bc0-4ff4-ac41-0984e293261a'. Only one identity column per table is allowed.".
An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80040E14 Description: "Database name 'tempdb' ignored, referencing object in tempdb.".
Error: 0xC004701A at Move Clean Records into Clean Enrollment, DTS.Pipeline: component "Fuzzy Lookup" (300) failed the pre-execute phase and returned error code 0xC0202009.
In a parent/child table structure (order/orderdetail) I have used identity columns for the orderdetail or compund primary keys. I find a single identity column on the detail table easier to manage (with a fk to the parent) but what ends up bieng easiest for the user is to have an order (say #3456) and detail items listed sequentially from 1 to n. This reflects a compound key structure but generating the 2nd field is a pain. Is there any way to tie an identity field to the parent key so that it will generate this number for me automatically?
Hi, I am having a bit of hassle with trying to enter details to multiple tables in SQL Server 2005. I have four tables, an Attendance Table (AttendanceID(PK Identity specific), MembershipNo, Date) Resistance Table (ResistId(PK Identity specific), Weight , Reps, Sets) Aerobics Tables(AerobicsID(PK Identity specific), MachineID, Intensity, Time) and a linking table for all of them.... ExerciseMaster(AttendanceID,ResistanceID,AerobicsI D)
My problem is that I can insert data to each specific table by itself using seperate insert statements.....eg....
//insert an attendance record to the attendance table string userID;
userID = Session["User"].ToString();
SqlDataSource pgpDataSource = new SqlDataSource(); pgpDataSource.ConnectionString = ConfigurationManager.ConnectionStrings["ConnectionStringLogin"].ToString();
finally { pgpDataSource = null; } //same code as above for the resistance table
However, i am facing the problem where this does not populate the link table(ExerciseMaster) with any information as i am unable to write the relevant IDs into the table that have been auto generated by SQL Server for each of the subTables. I have read several forums where they recommend using something called @@IDENTITY but i have no idea how or where to use this in order to fill my exercise table... Any help would be so much appreciated.... Also, hopefully what i have said all makes sense and someone will be able to help me...oh and one more thing...this is an ASP.NET page coding in C# Cheers Scotty
We will be using SQL Compact Edition in our application. We are doing some tests to make sure that SQL Compact is suitable for our requirments.
Our problem is with Primary keys and how to maintain data integrity since we will have 100+ clients inserting, updating, and synchronizing with SQL Server.
Can we control Identity range?
Shall we use UniqueIdentifires insted of int?
How can we detect errors at the client side? (For example, if two clients are trying to synchronize 2 columns with the same primary key value)
Hey All, I was trying to use a typed dataset to create a very simple DAL. I found that the code generated for the INSERT statement includes an identity field the table has. That can obviously never work (unless identity_insert is set, which it is not). My question is whether it is possible to control this insert statement generation? Is there a property I am missing somewhere? My solution was to change the INSERT statement on the DataTableAdapter, but that seems awkward for me to have to do that.. Thanks, Yuval
I have several tables that I need to sum up a colomn and display the results. I have been struggling with this for some time. Here are my Tables and their columns:
Ingredients_tbl IngredientID Description
Inventory_tbl IngredientID AmountRemaining Renconciled Active
Order_Details_tbl IngredientID OrderAmount Status
Order_Details_Details_tbl IngredientID OrderAmount Status
I want to display all the ingredients from the ingredients table, sum the amountremaining of the items that are reconciled = 'false' from the inventory_tbl, sum the orderamount from both the order_details_tbl and Order_details_details_tbl for each ingredient based on status. Here is some sample data and results I am looking for:
IngredientID Description Inventory = Sum of AmountRemaining of the records in Inventory_tbl where Renconciled = 'false' Production1 = sum of OrderAmount of the records in the Order_Details_tbl where Status = 'ORDERED' Or Status = 'MIXED' Production2 = sum of OrderAmount of the records in the Order_Details_Details_tbl where Status = 'ORDERED' Or Status = 'MIXED'
I thought this was going to be as easy as a few simple joins and aggregate sum on the colomns like this:
SELECT Ingredients_tbl.IngredientID, Ingredients_tbl.Description, Ingredients_tbl.LowInventory, SUM(Inventory_tbl.AmountRemaining) AS Inventory, SUM(Order_Details_tbl.OrderAmount) AS Production1, SUM(Order_Details_Details_tbl.OrderAmount) AS Production2 FROM Ingredients_tbl LEFT OUTER JOIN Inventory_tbl ON Inventory_tbl.IngredientID = Ingredients_tbl.IngredientID AND Inventory_tbl.Reconciled = 'False'
[Code] .....
But this obviously has its issues with incorrect returned sum values.
For a uncomplicated example, our database has 10 tables. Each table contains the column COMPANY. I need to change company from 1 to 4, and I don't want to have to update each table individually (because the number of tables is actually closer to 800).
COMPANY being a primary key isn't an issue.
Is there a painless way to update the COMPANY field in all user defined tables?
Hoping someone here can help. Perhaps I'm missing something obvious, but I'm surprised not to see a data flow task in SSIS for splitting *columns* to different destinations. I see the Conditional Split task can be used to route a *row* one way or another, but what about columns of a single row?
As a simple and somewhat contrived example, let's say I have a row with twelve fields and I'm importing the row into a normalized data structure. There are three target tables with a 1-to-1 relationship (that is, logically they are one table, but physically they are three tables, with one of them considered the "primary" table), and the twelve input fields can be mapped to four columns in each of the three tables.
How do I "split" the columns? The best way I can see is to Multicast the row to three different OLE-DB Destinations, each of which inserts to one of the three target tables, only grabbing the four fields needed from the input row.
Or should I feed the row through three successive OLE-DB Command tasks, each one inserting into the appropriate table? This would offer the advantage, theoretically, of allowing me to grab the identity-based surrogate primary key from the first of the three inserts in order to enable the two subsequent inserts.
TRANAMT being the amount paid & TOTBAL being the balance due per the NAMEID & RMPROPID specified.The other table includes a breakdown of the total balance, in a manner of speaking, by charge code (thru a SUM(OPENAMT) query of DISTINCT CHGCODE
Also with a remaining balance (per CHGCODE) column. Any alternative solution that would effectively split the TABLE1.TRANAMT up into the respective TABLE2.CHGCODE balances? Either way, I can't figure out how to word the queries.
Hi, I have tried this code from http://jtkane.spaces.live.com/Blog/cns!1pWDBCiDX1uvH5ATJmNCVLPQ!316.entry for full-text search on multiple tables & columns. Here's my code: SELECT * from [tStaffDir] AS e, [tStaffDir_PrevEmp] t,CONTAINSTABLE([tStaffDir], *, @Name) as AwhereA.[KEY] = e.[ID] andt.[ID] = e.[ID] I have FT the both the tables above and I am able to get results from the [tStaffDir] table but not the [tStaffDir_PrevEmp] table.The [tStaffDir_PrevEmp] table does have a column (which is [ID]) that is indexed, unique and non-Nullable.Please advise what I should do and look out for. Many Thanks.
1 2015 ba1 137 HL EL Eco 2 2015 ba1 138 EL SL HS 3 2015 ba1 139 SL EL His
From this table i use to admit a student and select their choice of group simultaneously all the subjects associated with GROUP is save on another table.
Here is the TABLE 2 Structure and sample data:
table 2 (NAME - tblstudetail)
id studentID session course sub1 sub2 sub3
1 15120001 2015 ba1 EL SL HS 2 15120002 2015 ba1 HL EL Eco 3 15120003 2015 ba1 SL EL His 4 15120004 2015 ba1 HL EL Eco
AND so no..........................
Now i just want to COUNT the Number of Groups Filled in tblStudateil.
I'm at loss how I'm supposed to work with typed datasets and Sql Server Compact 3.5, when inserting records and I need to update my datatables with the primary key of newly inserted rows.
I've tried adding a RowUpdated handler to all tableadapters that look like this:
I've previously used this type of approach when working with an OleDbDatabase, which works just fine. But it doesn't work with Sql Server CE 3.5, and since it doesn't support stored procedures I can't fix it that way either. And it doesn't support commands in a batch (i.e appending the Insert command of the adapter with ";SELECT @@IDENTITY") so that doesn't work either...
So how are we supposed to use Sql Server CE 3.5? It's impossible together with datasets? Or am I missing something obvious?
Im just curious how i would take multiple columns from multiple tables.... would it be something like this ??? table: Products COLUMNS ProductName, ProductID table: Categorys COLUMNS CategoryName, CategoryID,ProductID SELECT Products.ProductName, Categorys.CategoryName,Products.ProductID,Categorys.CategoryID,Categorys.ProductID FROM Categorys, Tables WHERE Products.ProductID = Categorys.ProductID
Table A has columns CompressedProduct, Tool, Operation
Table B in a differnt database has columns ID, Product, Tool Operation
I cannot edit table A. I can select records from A and insert into B. And I can select only the records that are in both tables.
But I want to be able to select any records that are in table A but not in Table B.
ie. I want to select records from A where the combination of Product, Tool and Operaton does not appear in Table B, even if all 3 on their own do appear.
This code return all the records from A. I need to filter out the records found in Table B.
SELECT ID, CompressedProduct, oq.Tool, oq.Operation FROM OPENQUERY (Lisa_Link, 'SELECT DISTINCT CompressedProduct, Tool, Operation FROM tblToolStatus ts JOIN tblProduct p ON ts.ProductID = p.ProductID JOIN tblTool t ON ts.ToolID = t.ToolID JOIN tblOperation o ON ts.OperationID = o.OperationID WHERE ts.ToolID=66 ') oq LEFT JOIN Family f on oq.CompressedProduct = f.Product and oq.Tool = f.Tool and oq.Operation = f.Operation
How can I make sure that a couple of commands are either all executed on the database or none of them. For example right now I have an insert, update and delete command. I'm calling each of them with a SqlCommand. So I am afraid that that one of them might be executed, then there's a bad connection and the other two are not. How can I prevent this so that only all commands or nothing is executed on the database?
Hi, I'm trying to create a form where new names can be added to a database. The webform looks like this:<body MS_POSITIONING="GridLayout"> <form id="Form1" method="post" runat="server"> Name:<asp:TextBox ID="newName" runat="server" /> <INPUT id="NewUserBtn" type="button" value="Create New User" name="NewUserBtn" runat="server" onServerClick="NewBtn_Click"> </form>And the code behind looks like this:Public Sub NewBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NewUserBtn.ServerClick Dim DS As DataSet Dim MyConnection As SqlConnection Dim MyCommand As SqlDataAdapter MyConnection = New SqlConnection("server=databaseserver;database=db;uid=uid;pwd=pwd") MyCommand = New SqlDataAdapter("insert into certifications (name) values ('" & newName.Text & "'); select * from certifications", MyConnection) DS = New DataSet MyCommand.Fill(DS, "Titles") Response.Redirect("WebForm1.aspx", True) End SubWhen I try to insert one name it works. When I try to insert a second name, it overwrites the old one. Why is that?Thanks.James
I have a lookup table called States, I have multiple other tables that use this lookup table, but I can only relate to one other table. My question is if I change a state name how do I enforce that change to the other tables that CANT be related? I know it is a design flaw and need some kind of joining table. I am having difficulty understanding and incorporating first normal form in my database. Here is what i have so far.
I have recently converted my DTS packages to SSIS and deployed them to the new server. I have the 2000 and 2005 server running concurrently, all that is left for me to do is compare the the tables generated by the DTS and SSIS packages to see if they are the same.
How do I go about comparing the tables, which are from two different servers using SQL server 2005?
I'm try to a multiple insert from one database to another by using this code:insert into [mpis].[dbo].[Residents] (acno,surname,name,ID,type) (select top 30 acno,surname,name,id,type from [PretoriaDB].[dbo].[WorkingDB]) but I keep on getting this error:Msg 8152, Level 16, State 9, Line 1String or binary data would be truncated.The statement has been terminated. Can any one help!!
hi I was just writing for some general advice. If I am to do many updates on a table is it okay to keep updating with many insert statements inside of a loop closing the connection each time? Here is some pseudo code to give you an idea:
I need to insert multiple rows for input rows that meet certain conditions.
My input data is as follows.
ZIPCode, Plus 4, Range, City, State
What I need to happen is that if there is a value in the range column that is > 0 then I need to insert a row for every range item.
For instance say I have the following data.
54952, 1001, 10, Menasha, WI
What I need imported is :
54952, 1001, Menasha, WI 54952, 1002, Menasha, WI 54952, 1003, Menasha, WI 54952, 1004, Menasha, WI 54952, 1005, Menasha, WI 54952, 1006, Menasha, WI 54952, 1007, Menasha, WI 54952, 1008, Mensaha, WI 54952, 1009, Mensaha, WI 54952, 1010, Mensaha, WI 54952, 1011, Mensaha, WI
Any help in pointing me in the right direction would be great. Thanks for your help in advance.
I am planning to use transacational replication (instead of merge replication) on my SQL server 2000. My application is already live and is being used by real users.
How can I ensure that replicated data on different server would have exact same values of identity columns and date columns (where every I set default date to getdate())?
It is very important for me to have a mirror image of data (without using clustering servers).
I have a requirement that if in a table update happened based on 1st condition then it should insert in one way and if update happened on second condition the insert statement will differ. That is it should insert the deleted records i.e., previous records existed in a table.The syntax is like
CREATE TRIGGER [dbo].[tr_a] on [dbo].[A] AFTER UPDATE AS BEGIN TRY IF NOT EXISTS
I'm working on a project for fun with some friends and have run into an issue with stored procedures. I've dealt with SQL quite a bit at my current job, but always from the perspective of somebody querying the database. The database was always managed by someone else and I never had to worry about the underlying code. Now, with my own project at home, I'm trying to deal with a situation and would like to use one, but I'm not sure if it is the best option and if so, exactly how to go about it.
Imagine a site that tracks movies. I have 3 tables:
Movies ( MovieID, Title, DirectorID, ActorID ) Actors ( ActorID, Name ) Director (DirectorID, Name)
This is an overly simple example, but it gets to the heart of my problem.
Okay, now what I'm wanting to do is to be able to write a procedure that would let me create my entries from just one call -- for instance
that would do the following things: -Look and see if the given director and actor already exist (from previous films) -If they do, grab their ID values and use those in the new movie entry -If they do not, create new entries and get THOSE ID values to use in the new movie entry
Can this be done in a stored procedure (I'm pretty sure it can be) and what sort of commands should I look into -- I'm not looking for a complete solution, cause I want to learn, but I am having trouble finding examples that fit my scenario.
