Hi, I have the lovely task of overhauling some of our SQL-based systems. I've found many tables that don't have unique identifying numbers that really should have them. I've searched around and people keep mentioning the Identity field as being similar to Autonumber in Access. The only examples I could find involved setting up a new table... but I need to add (and populate) an identity column to an existing database table. Does anyone know the command for this?
Example... my table is called PACountyTown. It currently has 3 columns: County, Town, and Area. I wish to call the identity-ish field RecordID.
I need sql script that can generate 'Create Table' definition including primary and foreign constraints for the table already existing in SQL server 2000.
Please do not refer me to the utilities or commercial software, I need only the sql script.
While I have learned a lot from this thread I am still basically confused about the issues involved.
.I wanted to INSERT a record in a parent table, get the Identity back and use it in a child table. Seems simple.
To my knowledge, mine would be the only process running that would update these tables. I was told that there is no guarantee, because the OLEDB provider could write the second destination row before the first, that the proper parent-child relationship would be generated as expected. It was recommended that I create my own variable in memory to hold the Identity value and use that in my SSIS package.
1. A simple example SSIS .dts example illustrating the approach of using a variable for identity would be helpful.
2. Suppose I actually had two processes updating these tables, running at the same time. Then it seems the "variable" method will also have its problems. Is there a final solution other than locking the tables involved prior to updating them or doing something crazy like using a GUID for the primary key!
3. We have done the type of parent-child inserts I originally described from t-sql for years without any apparent problems. (Maybe we were just lucky.) Is the entire issue simply a t-sql one or does SSIS add a layer of complexity beyond t-sql that needs to be addressed?
I want to insert a new record into a table with an Identity field and return the new Identify field value back to the data stream (for later insertion as a foreign key in another table).
What is the most direct way to do this in SSIS?
TIA,
barkingdog
P.S. Or should I pass the identity value back in a variable and not make it part of the data stream?
Has anybody ever tried to do this. I can't figure it out. All I want to do is take an existing table that already has values in the column that I want to change and add the identity property to yes and set the identity seed and increment to a specific number. I know you can do it in the CREATE TABLE statement but is there a way to use the ALTER TABLE command?
Hi Friends, I have a existing table named as activity, and have the column like ID,Description. I want to add the Identity for the ID column using script only.. Have any ideas how to do in sql query analyser?
I removed all constraints in order to load a bunch of data into a table, now I'm wondering if I can add an identity column to this table which does contain data or if I have to create a new table with the identity column and insert the data into that.
I am working with a table in SQL server. I have a column that I want to designateas an identity column. I am not able to do this, because the field for "Identity Specification" is not editiable. What I did was I went to sql server, right clicked and selected "Modify".The column properties dialog box/edit grid is then displayed with attributesthat I can modify. There are two major nodes in this dialog box. One is named "General" and the otheris named "Table Designer". I expand the "Table Designer" node and then go to the node labeled "Identity Specification" It is here where I would like to edit thevalues. The values that are listed for edit are listed below. BUT, the problem is thatI can place my cursor in those fields, but I am not able to change/edit them.Can anyone tell me what the problem is here? and how I can fix it? +Identity Specification (Is Identity) Identity Increment Identity Seed
We want to add a new int identity column as a primary key to an already existing table that has a primary key on Guid. Here is the DDL:
CREATE TABLE [dbo].[VRes]( [VResID] [uniqueidentifier] NOT NULL, [Mes] [varchar](max) NOT NULL, [PID] [uniqueidentifier] NOT NULL, [Segt] [int] NOT NULL,
[code]....
Also we currently have 3 million rows on this table. Is having an integer column as identity column and primary key better or shd I consider using BigInt?
hi I have a field call: password, I want to generates some random chars as default password for users (so user got something to login, and update later).
Current Solution I have: I made myself a trigger and it does generate password on insert, but the problem with that is I have to allow NULL on that field. I don't want NULL to be allowed, and if I don't allow null... sql server won't allow me to insert a record (when leaving password field empty).
Reason i don't wanna allow NULL on that field, is because there may be more applicaions using the same field from the same database. Just in case if the other developer gets sloopy, I don't want other application(s) allow user put to enter a null or leave it blank on my password field.
My question is: 1) can I put a function or some sort at the "Default" field under "Design Table", if so...how? 2) any suggestions for a better implementation? 3) if (1) doesn't work, what other options would you suggest other then the current trigger i'm using?
I want to add a computed field to an existing SQL table: where Field1 is >0 and field2 is not null set newfield = 'Y' else set newfield = 'N'
I want to keep this existing table because I'm using it as the basis for an Access Report that is nearly complete.
BTW this table is the result of a DTS package that is comprised of several SQL executables so I need to be able to repeat this as part of a larger process.
Hi, Is it possible to change any fieldname of an existing table?I mean to say by TSQL statement.We know that we can alter the data type and width etc. But I haven't got any info about filedname change.So if it is possible Please help... And Is there any TSQL command to alter multiple columns in a single statement?
I have a table with 1000000 records i try to add a field with following`spec.
[mkey] [int] IDENTITY(1,1) NOT NULL
I get the following meassage:-
yearly' table - Saving Definition Changes to tables with large amounts of data could take a considerable amount of time. While changes are being saved, table data will not be accessible.
Then I Have the following error:- Time out error
- How is the best way to copy a large table from one to anther.
I have 2 tables - tblOrders and tblOrderDetails. Every time an order is placed, 2 INSERT statements are executed. The first one enters the general order and customer information in the tblOrders table:INSERT INTO tblOrders (custname, custdetails, orderdate) VALUES (@custname, @custdetails, @orderdate)The primary key in this table is OrderID which is an Identity column. This is the foreign key in the tblOrderDetails table.I'm trying to get the Identity value from the first INSERT statement to use in the second INSERT statement:INSERT INTO tblOrderDetails (orderid, productid, productcost) VALUES (@orderid, @productid, @productcost) How do i obtain this value and how would I supply it to the second INSERT statement?
How can I alter a table turning ON or OFF an IDENTITY field ?
for example: if I had my DB with Client_ID as an I IDENTITY field and for some reason it has changed to just INT (with no IDENTITY) - how can I tell it to be IDENTITY field again ?
+
Does anyone knows an article on database planning ? (I wanna know when should I use the IDENTITY field)
I have a table X that has two columns (names have been changed to protect the guilty and innocent alike): ID which is an identity column, and Data which is a varchar.
I am trying to DTS data from a text file into this table. I want the identity column ID to auto-populate and each row of information from the file to be stored in the Data field.
I am creating the DTS package using the wizard in Enterprise Mgr. No matter what I try, I keep getting the following error:
Cannot insert the value NULL into column 'ID', table 'X'; column does not allow nulls. INSERT fails.
Any advice on what I need to do to get this working? It seems like such a simple thing and I'm getting very frustrated. :eek:
Dear All,Suppose in the program a record is added to a table whoseprimary key is a identity field. If I really want to get the lastestvalue for that field after the insertion, is it the best way to useIDENT_CURRENT() to obtain this value?Thanks for your kind attentionYours faithfully,Benny
I have a table which is already populated with data (Microsoft SQL 2008). I have now created a new column (int) which i want to populate with sequential numbers so that the new column created will serve let me know how many records exist in the table at a glance.
what SQL statement I need to write that will automatically polulate the newly created column with 1,2,,3,4,5 etc so that I can sort of number the records within the table.
I have 50000 records which I need to number and I really dont want to number the column manually via hand editing.
We are converting a legacy visual foxpro system to use a SQL back-end.A number of (existing DBF) tables currently have a zero-filled primarykey eg. '000255' which is just an auto-incrementing key - but alwaysstored as a char field with leading zeros.For backward compatibility we are considering retaining this primarykey and using an identity field to auto-generate the next value, thenconvert the new identity value into the new primary key. So ifidentity is 256 then the key field will be assigned '000256'.Now the problem with this is that the primary key must be non-null andunique so must be given a value in the INSERT statement. But, theidentity value isn't available (I presume) until after the INSERTstatement has executed.Is this a "don't go there" kind of problem?ThanksAndrew GrandisonSA Department of HealthAdelaide, South Australia
Hi, How to Change Increment Value for existing Identity Column (MS SQL2000) ?
I know how to change the seed : DBCC CHECKIDENT (activity, RESEED,4233596)
but I need the future id generated with step 2 4233596 4233598 4233600 I would like to do it using T-sql because I will need to do it every day after syncronising with another SQL server .
How do i drop/remove the identity property for an existing column in all Tables where the Identity column is a primary key. The Script below was used to find all the tables that have an Identity Column as a primary key in a database. Now i want to remove the identity property from the Identity Columns that have a primary key in the database.
select pk.table_name, c.column_name,
from information_schema.table_constraints pk
INNER JOIN information_schema.key_column_usage c ON c.TABLE_NAME = pk.TABLE_NAME
and c.constraint_name = pk.constraint_name
where constraint_type = 'PRIMARY KEY'
and COLUMNPROPERTY(object_id(pk.table_name), column_name, 'IsIdentity') = 1
I have a table with an integer field (contains test values like 2, 7,8,9,12,..) that I want to convert to an Identity field. How can this be done in t-sql?
I have met the interview question, I provide answer like the following from my experience. I don't know it is correct or need to supplement. Thank you for help.
Question: How to identity existing data for updating in SSIS?
Answer: If you have the same key columns such as primary key or business key, you just use them to identify existing records from data source to destination.
If you use different key columns between data source and destination, you can create permanent link table which will store business key for data source and destination, and you can compare records from linking table when you update data.
I need to run a data report that will query an Access_Table that has thefollowing Project info:My Form has a command_button with the following code:Private Sub Command1_Click()Set db = New Connectiondb.CursorLocation = adUseClientdb.Open "PROVIDER=MSDataShape;DataPROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path &"Access_Table.mdb;"Set adoAge = New RecordsetadoAge.Open "SELECT CustomerName, OrderNo, Invoice_Date,IIf([Invoice_Date]<Now()-30 And[Invoice_DATE]>Now()-60,[Invoice_Amount],"") AS Greaterthan30,IIf([Invoice_Date]<Now()-60,[Invoice_Amount],"") AS Greaterthan60 FROMCust WHERE [Invoice_Date]< Now()-30", db, adOpenStatic, adLockOptimisticSet DataReport1.DataSource = adoAgeDataReport1.ShowEnd SubMy DataReport1 has the following RptTextbox:RptTextbox Datafield1 CustomerName2 OrderNo3 Invoice_Date4 Greaterthan305 Greaterthan60Problem arise when trying to display the above report that has an errormessage that says "Datafield Greaterthan30 not found"Is this an SQL Query limitation where Invoice_Date Datafield can only bequeried once & if we have more than one Datafieldwith the same fieldname (Invoice_Date) within the same Data report,thereport will fail to run? Should there be one moreNew Recordset to hold a second Datafield (Invoice_Date)?can anyone help? ThanksFrom:Cady Steldyn*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
I have a table named PERSON and a field named PERSON_ID. How can I set this field to Autonumber? I know I have to use the IDENTITY command, but when I view this field in "design" view, all the IDENTITY options are grayed out.
How can I set this field with the IDENTITY properties?
I re-created a publication that was having problems and it gives this error when I start the snapshot agent from SQL Server Management Studio: I am stuck on how to resolve - any ideas?
"The publisher's identity range allocation entry could not be found in MSmerge_identity_range table. Transaction count after EXECUTE indicates that a commit or ROLLBACK TRANSACTION statement is missing. Previous Count = 1, current count = 2."
select * from MSmerge_identity_range returns 19 entries but I don't know how to fix.
I have tried deleting and re-creating but always get this error.
My other publications and subscriptions are working fine and I was able to create a new test publication that worked but can not get this one to work that worked fine up until today.
