Duplicate Unique Prime Key Error In Datastage
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baseUsers turn on suggestions Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for Search instead for Did you mean: Teradata : Product Forums : Database duplicate unique prime key error in teradata : duplicate unique primary key error Options Subscribe to RSS Feed Mark duplicate unique prime key error in target table Topic as New Mark Topic as Read Float this Topic to the Top Bookmark Subscribe Printer Friendly Page sharad failure 2801 duplicate unique prime key error Fan Options Mark as New Bookmark Subscribe Subscribe to RSS Feed Get Direct Link Print Email to a Friend Report Inappropriate Content 01-19-2006 03:46 PM 01-19-2006 03:46 PM duplicate unique primary failure 2801 duplicate unique prime key error in teradata key error Hi, I had to modify a column's width so i created a temporary table, with modified column width, and populated that temporary table through (insert into temp select * from original_table).Later I dropped the original_table and renamed the temporary table to the original one. The original_table had id as the unique primary index and was defined as "Id INTEGER NOT NULL
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GENERATED BY DEFAULT AS IDENTITY". Now I am not able to insert data in this table manually through insert query. It gives me error as "duplicate unique primary key error". Any solutions to rectify this situations. Please Help!!Thanks & Regards, 0 Kudos Reply All Forum Topics Previous Topic Next Topic 2 REPLIES Fred Teradata Employee Options Mark as New Bookmark Subscribe Subscribe to RSS Feed Get Direct Link Print Email to a Friend Report Inappropriate Content 01-19-2006 11:00 PM 01-19-2006 11:00 PM Re: duplicate unique primary key error GENERATED BY DEFAULT columns are not guaranteed to be unique anyway, but if you're sure that's what you want: create another table but specify that generated values START WITH a value beyond anything already present in the table; INSERT/SELECT the data, drop old, rename again.Since you have to copy the data to a new table anyway, consider whether GENERATED ALWAYS NOCYCLE would be better for your application. (Of course, then you wouldn't use "SELECT *" because you're not allowed to specify a value to insert into that column). 0 Kudos Reply DEEPU Enthusiast Options Mark as New Bookmark Subscribe
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of this site About Us Learn more about Stack Overflow the company Business duplicate unique prime key error world of warcraft Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask teradata odbc teradata driver teradata database duplicate unique prime key error Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign http://community.teradata.com/t5/Database/duplicate-unique-primary-key-error/td-p/383 up Teradata identity column and “Duplicate unique prime key error in dbname.tablename” up vote 0 down vote favorite I created a table using the below definition for a Teradata identity column: ID INTEGER GENERATED BY DEFAULT AS IDENTITY (START WITH 1 INCREMENT BY 1 MINVALUE 0 MAXVALUE 100000000 NO CYCLE), ---- UNIQUE PRIMARY INDEX ( ID ) For several months, the ID http://stackoverflow.com/questions/11727972/teradata-identity-column-and-duplicate-unique-prime-key-error-in-dbname-tablena column has been working properly, automatically generating a unique value for the column. Over the past month, however, ELMAH has been intermittently reporting the following exception from our .NET 4.0 ASP.NET app: Teradata.Client.Provider.TdException: [Teradata Database] [2801] Duplicate unique prime key error in DATABASENAME.TABLENAME. I was able to replicate it by opening SQL Assistant and inserting a bunch of records into the table with raw SQL. As expected, most of the time it would insert successfully, but other times it would throw the above exception. It appears that this error is occuring because Teradata is trying to generate a value for this column that it has previously generated. Does anyone have any idea how to get to the bottom of what's happening? At the very least, I'd like some way to debug the issue a bit deeper. unique identity teradata share|improve this question asked Jul 30 '12 at 19:06 oscilatingcretin 2,8261468131 add a comment| 1 Answer 1 active oldest votes up vote 0 down vote I would suggest changing the definition of your identity column to GENERATED ALWAYS to prevent the application or ETL process from s
SQL JOINS , we sometime may face DUPLICATE PRIMARY KEY ERROR. This error may especially come while tables containing history are included in JOIN conditions. So while using SQL Joins, we must http://usefulfreetips.com/Teradata-SQL-Tutorial/remove-duplicate-unique-primary-key-error/ take care of this problem. Let us look into this problem in more detail: Duplicate Unique Primary Key Error in Teradata Suppose we have a table which is maintaining history of all the CUSTOMERS. http://www.teradataworld.com/blog/2015/07/02/identity-column/ And we do a join with this table with some other table on the basis of CUST_ID (key column in this case) . Since the table is maintaining history of CUSTOMERS, so it duplicate unique will be having multiple entries for same CUST_ID. So if the join condition is on CUST_ID, it will result in one to many mapping and the result set will also have multiple entries for same CUST_ID. Now if the target is having CUST_ID as primary key, it will throw UNIQUE PRIMARY KEY violation error. So how to avoid such situation ? The easiest way of overcoming this issue duplicate unique prime is to fetch the latest entry of CUST_ID from the history table. So in that case, it will be fetching only one instance of each CUST_ID even if multiple entries exists. Now we will see how we can implement this using the SQL in Teradata. If the table is maintaining history in the table then it must be having a date column which will be useful in maintaining history. So you can put a condition on the date column to fetch only the latest row when multiple exists for same key. Let us see how you can implement this check in Teradata: SELECT CUST_ID , CUST_NAME,CUST_CITY FROM CUSTOMERS QUALIFY ROW_NUMBER() OVER (PARTITION BY CUST_ID ORDER BY DAT_UPD DESC)=1; This query will fetch only one instance of each row. So you can add this clause at the end of any SQL query involving tables with multiple entries for same key. This way you can avoid UNIQUE PRIMARY KEY violation error.
EmailFacebookLinkedInTwitterGoogleMoreTumblrReddit Related Posted in: Teradata SQL Tutorial - Advance Tags: AVOID UNIQUE PRIMARY KEY VIOLATION ERROR, DUPLICATE UNIQUE PRIMARY KEY ERROR after SQL JOINS, TERADATA SQL TUTORIAL Page with Comments Pingback: Teradata interview question | Teradata Leave a Reply Cancel reply Post navigatiTeradata Mode vs ANSI Mode Teradata Certification - Professional Ranked 7th - Salary Survey 2015 Teradata Surrogate Key / Identity Key Generation Fastload - Teradata Utility Error Handling Multiload - Teradata Utility Error Handling ADD_MONTHS in Teradata Teradata INTERVAL Function Teradata's Interactive Growth History Timeline STATS Process - Daily / Weekly / Monthly Teradata Client List Teradata Pyton module for DevOps EXPLORE TERADATA 15 FEATURES Teradata QueryGrid Certification Forum Interview Interview Question (Q's) Teradata : SET 1 Teradata : SET 2 JOB Opportunities Tutorial Teradata DBA Teradata Developer Teradata Features Teradata Parallel Transporter - TPT Teradata 13 latest new features & capabilities Teradata 15 New Features Technologies Greenplum Unleashing UNIX Download Identity Column by TDWORLD / No Comments / 23 View / July 2, 2015 TDWORLD Identity columns are used mainly to ensure row uniqueness by taking a system-generated unique value. They are valuable for generating simple unique indexes and primary and surrogate keys when composite indexes or keys are not desired. Identity columns are also useful for ensuring column uniqueness when merging several tables or to avoid significant preprocessing when loading and unloading tables. You should not create an identity column for a table that you intend to use with Teradata Unity. Teradata Unity provides its own mechanism for generating deterministic unique values that do not present the problems that identity columns do for managing multiple Teradata Database instances Note:Loading a row from a client system that duplicates an existing row in an identity column table is permitted because the assignment of the identity column to the row makes it unique. If this presents a problem, you must filter your data for duplicates before you load it into an identity column table. The various parameters for identity columns are maintained by theDBC.IdColsystem table. Identity columns have the following properties. Begin with the value 1 unless a different START WITH value is specified. Increment by 1 unless a different INCREMENT BY value is specified. Can decrement if a negative INCREMENT BY value is specified. Can specify maximum values for incrementing or minimum values for decrementing a value series.