How Can I Add A Unique Key Column To A Table And Generate Its Values Automatically?
May 2, 2006
Hi, all,
I have a question about adding a unique key column to an existing table.
what i trying to do is that: I have already created a table, now i wanna add a ID column to this table, and generate the values for ID column from 1 to the existing row number. How can I get this done?
A common partitioning scenario is when the partition column has the same value for every record in the partition, as opposed to a range of values. Am I the only person who wonders why there isn't an option to automatically partition a table based on the unique values of the partition column? Instead of defining a partition function with constants, you ought to be able to just give it the column and be done. This would be particularly valuable for tables partitioned on a weekly or monthly date; when new data is added it could simply create a new partition if one doesn't already exist.
I am using Access 2007 and I have 10 columns of data.
I am trying to select all the data from all 10 columns where the first column's data returns only the Unique values and the other columns return all the data from the row that is returned from the first column.
But that returns all the data in the table and all values in the Sorter column with duplicates because each row has distinct data.
I am trying to return unique values from [SFR Rates All].Sorter (the first column) and all the data from the other 9 columns that are contain the row with the unique value in Sorter.
I know that I am missing something basic but well, I can't figure it out.
I've got a large table (3mil records) with a number of columns, but currently no way to refer to any individual column. I therefore need a primary key, but does anyone know of a SQL statement I can use that will create a column (say, ID) that is automatically filled with an incrementing 'counter'? Or, instead, how can I set unique incremental values after first creating the column?
I need to write a select query that gets the values of all columns but only returns unique sites because some sites are load balanced across several servers and where this is the case I don't want the site to appear multiple times in the list.
I have a table which maps two related IDs. That table has 3 columns: ID, BHID & EPID. I need to find all of the BHIDs where the EPID is unique. It seems easy enough, but I keep going in circles..
USE [CGB] GO /****** Object: Table [dbo].[ePID_BHID] Script Date: 04/15/2015 15:48:14 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON
Hi there I need to generate some variables , like var1, var2, var3 .... It's determined by how many records in my database. I want to write a for() to do this. But how? For example for(int i=0; i<datatable.rows.count; i++){ String vari = new String;} This is not a right way in C#, does anyone know how to? Thanks!!!
I generate SQL scripts on a regular basis for my database and it's objects. Is it possible to run a job in SQL or make windows do this automatically on a periodic basis? Anyone done this before?
Hello everyone, I am new to ERWIN and I need helps from the experts outthere.We are using ERWin 4.1.2771 and have reversed engineered some MS SQLServer 2000 databases.The problem we are having is that we have a FK on a column to a tablewhere the PK of the referencing table is on another column (such as anidentity column). We have a unique index on the column in the PK tableand SQL Server allows you to build a FK reference even though thecolumn is not defined as the PK.Does anyone know how to create this type of FK within Erwin?Thank You
Is it possible to create a unique constraint to a column from anothertable? For example:tb_current:current_names--------------aaabbbtb_new:new_name--------cccNow I want to create a constraint on tb_new.new_name to be unique withrespect to tb_current.current_names. However, tb_new.new_name shouldnot be unique to itself. So I should not be able to insert 'aaa' totb_new.new_name. But I should be able to insert 'ccc' totb_new.new_name.Here's the script to reproduce this example:create table tb_current(current_names varchar(10))create table tb_new(new_name varchar(10))insert tb_current values ('aaa')insert tb_current values ('bbb')insert tb_new values ('ccc')select * from tb_currentselect * from tb_newinsert tb_new values ('aaa') -- this should NOT be allowedinsert tb_new values ('ccc') -- this should be allowed
I'll try to explain what I'd like to do. On my SQL Server 2005, SSAS contains a mining model (In fact a cluster one). I'd like to show a detailed diagram build from this model on a web site. This diagram (and this is why I need automation) would depend on the user who's consulting it. For example, a firm A will see the number of its customers in each cluster, and this information will be different for another firm B
So, I thought about several steps to perform: 1) Feed the model with the data for each firm 2) Build a Visio diagram from the previous data using the DM addins for Visio 2007 3) Generate HTML using the Visio export wizard 4) Publish HTML And (important) this should be done automatically.
I made some experiments: Step 1 is easy to perform with SSIS Step 3 is also easy to do with the Visio SDK (using, among others, the exportAsHtml control) and Step 4 is trivial
I failed to perform stage 2, even with the SDK, since creating a diagram from a DM template requires the user to fill a wizard. By code, I'm able to create a document from a DM template, Drop a DM Stencil but when the wizard appears I'm unable to get a handle on it. And even if I was, I dunno if it would be a "clean" way of doing.
So my question is: first of all: isn't there an easier way to generate HTML from Mining Models automatically? And if my approach to this problem is the best (or the "least bad"), how to generate datamining Visio diagrams from code automatically?
I am trying to insert a unique code, like a voucher code, into a table in MSSQL, 10 numbers (0-9) which obviously needs to be unique.
I can code this in ASP, but I think the process could be a bit long winded, i.e. create a key - run a stored procedure to see if it is free if not loop and check again. Surely there would be a way to do this in a stored procedure in one?
So the code would look like 3928492834.
1. Generate Key in SQL 2. Check if not used in column 'kcode' if it is, regenerate and check again.
Any advice would be greatly appreciated, I know how to do this in ASP but bit of a SQL newbie!
Is there any way to auto generate the unique primary key when inserting data in MS SQL? there is a way to create the increasing integer as primary key, but is there any ways other than that?
I'm working on a final project for school. It is a warehouse application. For this application I will need to generate a barcode. I have read some articles online and found out that I could use the code 39 barcode font.
I just don't fully understand how to generate the unique barcode. Could someone please help me? I also would like to store the barcodes in a sql server table. Could I use reports to print the barcode?
I need to generate a random 10 digit alphanumeric string that is also unique within a table. My application will be calling a stored procedure to insert this number into the table. This number will be associated with a id from another table. Is it better to generate the random number within sql (and perform the lookup at the same time), then just pass the number back to the calling application ?
If the calling application generates the number, it will also need to make a call to check if its unique. So im thinking it would be best to simply have sql generate this random number, check the number against the table and then insert the new record.
Requirements • ALPHANUMERIC FORMAT – > AA00AA00………..ZZ99ZZ99 Last 8 bytes will alternate between 2 byte alpha/2 byte numeric • Generate from Alphabets – A through Z Numbers -0 to 9 • Generate Unique Sequence (No Duplicates). • Must Eliminate letters I and O
Output Expected • AA00AA00………..ZZ99ZZ99 • Using 24 alphabets & 10 digits , 24*24*10*10*24*24 = 3 317 760 000 records
Below is my Sql Function -
CREATE function [dbo].[SequenceComplexNEW] ( @Id BIGINT ) Returns char(8)
Hi, I have a doubt about the behaviour of SQL Server 2005 in the situation I'm going to describe you. Suppose that you have a SQL Server 2005 database on your PC, and suppose that this database has a table with a column classified as "unique" (so it's impossible for this table to contain 2 records having the same value in this column). Suppose that you publish this database and you create 2 SQL Server Mobile 2005 subscriptions on 2 Pocket PCs. Suppose now that the first PPC (using an embedded program) creates a record with a certain value for the column (and adds it to the table), and the second PPC makes the same thing (it inserts a record with the same column value of the first PPC). At this point, you connect the 2 PPCs to your PC (one by one, of course), to synchronize (using merge replication) the databases...
WHAT HAPPENS??? Does an error raise? Must you give a publication setting in which you say that, if this situation occurs, PC SQL Server holds the last (or the first, as you decide) record acquired? Is it possible?
The SP UserPersist_GetByCriteria does a "SELECT * FROM tbl_User WHERE gender = @Gender AND culture = @Culture", so why am I receiving this error when both tables have the same structure?
The error is being reported as coming from UserPersist_GetByCriteria on the "SELECT * FROM tbl_User" line.
We have SharePoint list which has, say, two columns. Column A and Column B.
Column A can have three values - red, blue & green.
Column B can have four values - pen, marker, pencil & highlighter.
A typical view of list can be:
Column A - Column B red - pen red - pencil red - highlighter blue - marker blue - pencil green - pen green - highlighter red - pen blue - pencil blue - highlighter blue - pencil
We are looking to create a report from SharePoint List using SSRS which has following view:
red blue green pen 2 0 1 marker 0 1 0 pencil 1 3 0 highlighter 1 1 1
We tried Sum but not able to display in single row.
I have an SSIS package that imports data from an Excel file, replaces any value in Excel that reads "NULL" to "", then writes the data to a couple of databases.
What I have discovered today, is I have two columns of dates, an admit date and discharge date column, and what I need to do is anywhere I have a null value in the discharge date column, I have to replace it with the value in the admit date column.
I have searched around online and tried a few things using the Replace funtion in Derived columns but no dice so far.
I am new to SQl Server, i have created a logical model for a database that i am creating for a project. Is there a way i can assign automatic values to my Primary Key (PK) Column other than using an identity?
For example i have a table called indicator for which the Primary Key (PK) is indicator_identifier; i want the primary key values to be ind_0001 ind_0002 ind_0003
Please note that i may be populating the tables from a VB.NET form