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Questions tagged [identity]

Creates an identity column in a table. This property is used with the CREATE TABLE and ALTER TABLE Transact-SQL statements.

4
votes
2answers
225 views

Serializable range deadlocks

Help required on an inherited deadlock problem! The code given below appears to have been written some time back, in an attempt to address contention issues around the assigning of new ID values on ...
2
votes
1answer
29 views

Function SCOPE_IDENTITY not found

When I call SCOPE_IDENTITY in Sybase, I get [Error] Script lines: 1-6 -------------------------- Function 'SCOPE_IDENTITY' not found. If this is a SQLJ function or SQL function, use ...
4
votes
1answer
53 views

PostgreSQL How to DEFAULT Partitioned Identity Column?

PostgreSQL 11 What is the best way to generate default values for identity columns on partition tables. E.g CREATE TABLE data.log ( id BIGINT GENERATED ALWAYS AS IDENTITY ...
2
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1answer
46 views

What are the origins of the Identity Column? [closed]

Who were the first creators of the Identity column? What problem were those creators originally trying to solve? Is there a story behind it?
11
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4answers
1k views

Identity column re-seed: when it is necessary?

During one of the last lessons at university (I'm a student), lecturer asked us to develop a database (MySQL Server if it matters) and tiny client app that would consume the database as data source. ...
-1
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0answers
24 views

SQL Server 2014 Identity Gap of nearly 3.5 Billion (Not the 2012 1000+ Jump)

Three days ago, an issue was identified in our core database with regards to the INT identity column of a core table. When we created the table we seeded the identity at -2147483648. As of three ...
1
vote
0answers
60 views

Identity column changing on its own?

I have a situation where a client is using software that writes to a SQL table. The program has been running fine with no issues prior to today. Today, they began receiving errors inserting NULL ...
0
votes
1answer
44 views

Populate Identity column with sequential numbers restarting count on change of key field

I am attempting to populate an Identity column with sequential numbers but I want the count to start over when the value of a key field changes. Example data and desired ID column results: Month_ ...
0
votes
1answer
69 views

How to increment identity without add a row and get the skipped value?

I'm trying to preserve value in identity column in manner to be added later. The value should be used in implicit foreign key when there is no constraint. For example: I have this table: Create ...
2
votes
1answer
23 views

Database Entity Design for Enumeration Table

I have an enumeration of ~10 values - they are Char such as A through K. These are all unique. They are used for two purposes - an application is forced to select acceptable values and also there is a ...
0
votes
1answer
88 views

How can I insert without changing the identity seed? [duplicate]

I will add the records in table A to table B. The tables are the same. However, table B is an actively transactional table. When doing the operation, the record in the tableB will continue to be added ...
2
votes
1answer
38 views

SQL Server Replication changing a tables ID numbers

I am using a merge replication setup for our ERP system and I encountered this problem: While creating a new entry on a table and with the last ID number given was 25, then new entry got the ID ...
3
votes
1answer
96 views

Clustered Index Maintenance vs. Nonclustered Index Maintenance

There is a plethora of information available detailing why an IDENTITY field should be use as both the primary key and clustered index of a table for most situations; yet I'm having difficulty ...
0
votes
0answers
172 views

HSQLDB get next value for IDENTITY column

I'm looking for a query to get the next IDENTITY value of a HSQL table. Like if I were to insert a new row into a table that has an auto id column, what value would that turn into. I did some ...
0
votes
2answers
39 views

SQL Server - Copying a key from one table to another

In a trigger, I have created a table using SELECT * INTO. I have done that in a specific way, in order to create the table without also creating the identity column that exists in it (let's name this ...
2
votes
1answer
293 views

Availability Group, asynchronous mode, manual/forced failover - handling identity overlap

We have a two replica 2017 Standard Availability Group in asynchronous mode. With a failover (manual/forced, since can't do automatic), we have the potential for overlapping/reused identity values if ...
6
votes
1answer
284 views

How to add a PostgreSQL 10 identity column to an existing table with rows?

I have a table with some rows and I try adding an identity column using the command: ALTER TABLE sourceTable ADD COLUMN ogc_fid int GENERATED BY DEFAULT AS IDENTITY; The ...
0
votes
1answer
102 views

Restore all IDENTITY seeds (out of sync since database restore)

We have recently done a full restore on a database from a backup (schema & data). When trying to insert new rows we are getting the "Cannot insert duplicate key in object" error message, it is ...
4
votes
1answer
1k views

How to add a PostgreSQL 10 identity column to an existing table?

I'm reading about the new Postgres 10 identity column, and saw how it is used to replace SERIAL columns when CREATE TABLE. Is it also possible to add an identity column to an existing table? For ...
2
votes
2answers
700 views

Can IDENTITY COLUMNS generate UUIDs?

I'm just wondering if either the spec of the implementation (PostgreSQL) provides for generating identity columns from UUIds or the like. Is there an alternative to, CREATE TABLE f ( id uuid ...
2
votes
2answers
2k views

How can I change an existing type from “bigint” to “bigserial”?

I have a PostgreSQL table with the following structure: I simply need to change the TYPE of prove_identity_id from bigint to bigserial. I read the docs but wasn't able to understand how to legally ...
7
votes
2answers
662 views

PostgreSQL 10 Identity Column gets “null value” when inserting multiple rows with default keyword

I recently upgraded from PostgreSQL 9.5 to PostgreSQL 10. One of the nifty features in PostgreSQL 10 is the new identity column type, an alternative to PostgreSQL' serial pseudo-type. Official ...
0
votes
1answer
3k views

How to fix all duplicate key value violates unique constraint

I have a Postgres database that I created with a Django application. When I transferred it over, it never reindexed anything and it gives me errors trying to do this. It seems as if there are lots of ...
2
votes
2answers
381 views

Custom Sequences with SQL Server

What is the best method to generate a Custom Auto-Generated Sequence with SQL Server? Here is my requirement: My application is hosted on 10 independent servers which are not interconnected. Each ...
2
votes
1answer
26 views

Existing data to new table, how to set up the PK & Identity

I am moving an Access app to SQL Server. I have confirmed the data in the existing PK is unique so I want to copy it into the new PK Identity field. The field is currently set as IDENTITY(1,1). I ...
2
votes
1answer
686 views

How to get information about the sequence behind the new Identity Column in Postgres 10? (GENERATED { ALWAYS | BY DEFAULT } AS IDENTITY)

Postgres 10 brings an implementation of the SQL standard GENERATED { ALWAYS | BY DEFAULT } AS IDENTITY feature, loosely known as identity column. This feature supplants Postgres’ own SERIAL pseudo-...
1
vote
1answer
108 views

identity value way off in a restored database

I have a table with a identity primary key column. Its last value is 5228491220 using IDENT_CURRENT. I make a full backup of the database, restore it on a second server. (We backup and restore daily ...
1
vote
1answer
333 views

SQL GUID or Identity in the Cloud

Follow up from my previous question SQL Server Identity Column in the Cloud: Are there any general guidelines? Should a person use Clustered Index Identity or GUID in the cloud for SQL Server 2016? ...
-2
votes
2answers
261 views

Problems with having SQL Server Identity Column in the Cloud

Our company is utilizing Identity(1,1) clustered primary index in SQL Server 2016 Enterprise, and will eventually deploy into the Cloud (Amazon AWS, Google Cloud). Is there any issues utilizing ...
0
votes
0answers
38 views

inserting data with identity using sql server management tool [duplicate]

I need to insert a set of rows using SQL Server Management Studio with a copy/paste method to a specific table, but the ids are generated automatically even though the data contains already the values ...
0
votes
3answers
710 views

Configured identity seed starting value on database level

Is there an option in sql server to configure the default starting value(seed) of an identity column on a database level . I want that by default, every table that created with an identity column ,...
3
votes
1answer
96 views

Can an Oracle IDENTITY column be nullable?

I want to create an ID column that automatically generates unique ID numbers by default. Users won't be inserting rows via INSERT statements, rather, they'll create rows using an out-of-box ...
6
votes
3answers
9k views

How to copy migrate data to new tables with identity column, while preserving FK relationship?

I want to migrate data from one database to another. The table schemas are exactly the same: CREATE TABLE Customers( [Id] INT NOT NULL PRIMARY KEY IDENTITY, (some other columns ......) ); ...
3
votes
1answer
47 views

Adding an identity field to be the new cluster of a large table - how do I get the “right” order?

I have a very large table (88m rows, nearly 300GB in size) that has a poorly planned clustered index. I want to add a BIGINT identity field, and make it the new clustered index (having the desirable ...
3
votes
1answer
352 views

How to replace a single table with Identity Primary Key column from a database backup?

I need to restore a table from a backup. My understanding is the only way to get a single table back into the database is to copy it into a temporary table. Then drop the old table and rename the new ...
5
votes
3answers
698 views

How to reduce identity values to avoid integer overflow?

I have some leaf tables (no FK towards them) with a few hundreds of thousands records that are used to synchronize some external data using Entity Framework ORM. This involves some DELETEs followed by ...
0
votes
1answer
76 views

Search all table, find PrimaryKeys with Id = int/bigint and enable Identity, autoincrement

I have a large list of tables and due to change in middleware platform, the middleware is no longer creating the auto-increment on Add New Record at the app layer, as a result, I need to do this in ...
3
votes
2answers
35 views

Does anyone ever use database sequences that count down from 2^64-1?

Does anyone ever use database sequences that count down from 2^64-1, rather than up from 1, for assigning ids to rows? The motivation for doing this would be to ensure that any application consuming ...
4
votes
1answer
196 views

Is there a way to catch a dbcc checkident command

A colleague of mine noticed incorrect ids generated for inserted items. Most probable cause: some script issues a command like the following: dbcc checkident('dbo.table', reseed, 1) I have thought ...
0
votes
1answer
229 views

Create trigger to ignore user input for Identity Columns

Using the this table definition CREATE TABLE testtable ( id NUMBER GENERATED AS IDENTITY, desc VARCHAR2(30) ); I would like to create a trigger before inserts and updates to ...
3
votes
1answer
1k views

Restoring database backup makes identity column start at 1 again

I created a backup of our database in SSMS 2012, using Tasks -> Backup as a Full Backup, including all data. When I restore this backup on another server (2012 as well), all identity columns are ...
18
votes
6answers
3k views

What can be the downside of always having a single integer column as primary key?

Within one Web application I am working on, all database operations are abstracted using some generic repositories defined over Entity Framework ORM. However, in order to have a simple design for the ...
1
vote
2answers
67 views

Generate INSERT list but only for non-nullable columns

I am currently using SSMS 2016 as client and have an Azure SQL database (also 2008 r2). But I am looking for a way to create a custom template to have an insert statement prepared with only the ...
5
votes
2answers
8k views

Changing identity column from INT to BIGINT

I have a table with an identity column that is also a primary key. Currently, it has 50 million rows, with the highest value of the identity column sitting at 148,921,803. The table has a lot of ...
5
votes
3answers
2k views

What are Identity Columns?

I was reviewing the commit-fest scheduled for 7/01 for PostgreSQL and I saw that Pg is likely going to get "identity columns" sometime soon. I found some mention in information_schema.columns but ...
17
votes
1answer
1k views

Is it safe to rely on the order of an INSERT's OUTPUT clause?

Given this table: CREATE TABLE dbo.Target ( TargetId int identity(1, 1) NOT NULL, Color varchar(20) NOT NULL, Action varchar(10) NOT NULL, -- of course this should be normalized Code int ...
10
votes
1answer
641 views

Changing primary key from IDENTITY to being persisted Computed column using COALESCE

In an attempt to decouple an application from our monolithic database, we've tried to change INT IDENTITY columns of various tables to be a PERSISTED computed column that uses COALESCE. Basically, we ...
1
vote
1answer
122 views

INSTEAD OF INSERT trigger

Consider this a follow-up to BULK INSERT: Trials and Tribulations I have the following VIEW defined and would like to insert into the multiple underlying tables when sending a BULK INSERT from a CSV. ...
8
votes
1answer
414 views

Is $IDENTITY documented and reliable in SQL Server?

I learned that SQL Server can return the value of the (single) identity column of a table using the pseudo-column $IDENTITY: SELECT $IDENTITY FROM Table Is this feature documented and reliable? The ...
5
votes
3answers
883 views

How to change primary key's data type from int to bigint in a huge transactional database under tremendous load?

This is a legacy system, with more than 1 billion records in a table that undergoes 10 million transactions per day. Now the application complains that: Arithmetic overflow error converting ...