Oracle insert into table with primary key

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This question is Latest Followup You Asked I am dealing with a 3rd party legacy application, in which the code cannot be changed. Periodically, this application inserts rows in a table which causes it to have a Primary key error. I need a way to "stop Oracle" from raising a exception of "ORA unique constraint" when bad rows get inserted.

At first I tried to use a "before insert" trigger, but this got me with messages about mutating table. I did some research and found a couple of techniques would could help me, but they both required a change to the insert statement. So, how can I achieve this? Stored outlines? The statement that fire doesn't use bind variables, so not sure If I can go this way. Sql Profiles? Sql Plan Management? Here is my example to play with I want this to happen dynamically without having to change the code.

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So, how can I "inject" this "hint" into the query? What approach and can you share any code? Thanks again for any advice. I think you might be out of luck here. I must admit, this strikes me as not the best way to tackle the problem, because of the risks ie, you'd never know if you'd rejected 1 rows or 10 million rows over the lifetime of the table.

The only thing I could think of would be replacing all the tables with views of the same name, and using instead-of triggers, but that seems a drastic approach. You can also catch regular content via Connor's blog and Chris's blog. Or if video is more your thing, check out Connor's latest video and Chris's latest video from their Youtube channels. And of course, keep up to date with AskTOM via the official twitter account. Questions Modify Insert statement to avoid Primary Key constraint.

Question and Answer. Latest Followup. You Asked I am dealing with a 3rd party legacy application, in which the code cannot be changed. Write a Review. Thanks Connor and Markus Very creative approach and code! This table would have great than million rows and constantly grows, so, I don't think it would scale well.

But, since it's just happening in 1 table, I will investigate the instead of trigger approach. Hello again, I tested the code you provided, indeed it worked! Your T1 table generated had 10 million rows and it held up well!!! The code that insert uses an anyonymous transaction to pound in hundred of rows at a time. Now, of course in my example, I created the table t1 just as a simple table just to demonstrate my problem. The real table and pk is quite different.

I am having problems trying grasp and re-code the trigger to accommodate.A primary key is a column of a combination of columns in a table that uniquely identifies a row in the table.

Typically, you create a primary key for a table when you create that table. Notice the following clause:. It means that the combination of values of these columns uniquely identifies a purchase order line item. Sometimes, you may want to add a primary key constraint to an existing table. The following example creates the vendors table first and then adds a primary key constraint to it:. For example, you can drop the primary key constraint of the vendors table as follows:.

Introduction to the primary key A primary key is a column of a combination of columns in a table that uniquely identifies a row in the table. The following are rules that make a column a primary key: A primary key column cannot contain a NULL value or an empty string.

A primary key value must be unique within the entire table. A primary key value should not be changed over time.

According to these rules, the following are the recommendations for the primary keys: First, the primary key should be meaningless.

Sometimes, you may want use meaningful data, which considers being unique, for the primary keys e.

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In such cases, it will create many data problems. In the database world, the artificial keys are known as surrogate keys which are as opposed to natural primary keys. Second, the primary keys should be compact. The primary keys typically are numeric because Oracle typically processes numbers faster than any other data types. It is considered a best practice have a primary key in every table though it is not mandatory in Oracle. Was this tutorial helpful? Yes No. Next Tutorial: Oracle Foreign Key.

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Learn from thousand of experts, get answers to your questions and share knowledge with peers. Error: You don't have JavaScript enabled. This tool uses JavaScript and much of it will not work correctly without it enabled.

oracle insert into table with primary key

Please turn JavaScript back on and reload this page. Welcome to Oracle Communities. Please enter a title. You can not post a blank message. Please type your message and try again. This discussion is archived. Hi, How can i insert data into foreign key relate table?

Primary key with Non Unique Index

I have already inserted data into parent table. Thanks in advance. I have the same question Show 0 Likes 0. This content has been marked as final.

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Show 9 replies. Using insert command. Make sure all parent records exists. Are you getting an error? If so please mention it.Easily connect your databases and create powerful visualizations and interactive dashboards in minutes.

We've launched a new website to help you understand the data principles you need to get answers today. Much to the frustration of database administrators worldwide, prior to Oracle version 12c in mid, Oracle simply had no inherent ability to inherently generate auto incrementing columns within a table schema. While the reasons for this design decision can only be guessed at, the good news is that even for users on older Oracle systems, there is a possible workaround to circumnavigate this pitfall and create your own auto incremented primary key column.

oracle insert into table with primary key

The first step is to create a SEQUENCE in your database, which is a data object that multiple users can access to automatically generate incremented values. While we have our table created and ready to go, our sequence is thus far just sitting there but never being put to use.

Typically a TRIGGER will be configured to fire when a table is updated or a record is deleted, providing a bit of cleanup when necessary. The dual table is just a single dummy row of data and is added, in this case, just so it can be ignored and we can instead execute the system function of our trigger rather than returning data of some kind. Login Get started free. Get Started with Chartio. New Learning Platform We've launched a new website to help you understand the data principles you need to get answers today.

Learn Data.Register and Participate in Oracle's online communities. Learn from thousand of experts, get answers to your questions and share knowledge with peers. Error: You don't have JavaScript enabled.

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Please type your message and try again. This discussion is archived. How could i do this?

oracle insert into table with primary key

Please suggest? I have the same question Show 0 Likes 0. This content has been marked as final. Show 2 replies. You want the foreign key to be filled automatically? How can this be automatic? Only you can decide where the details should go, under which Master record. In your code where you perform the insert into the parent table, you can use the RETURNING clause to receive the primary key value that the trigger on the parent table has assigned to the parent-row that was just inserted.

Go to original post.A primary key is a column of a combination of columns in a table that uniquely identifies a row in the table.

Typically, you create a primary key for a table when you create that table. Notice the following clause:. It means that the combination of values of these columns uniquely identifies a purchase order line item. Sometimes, you may want to add a primary key constraint to an existing table.

The following example creates the vendors table first and then adds a primary key constraint to it:. For example, you can drop the primary key constraint of the vendors table as follows:.

Introduction to the primary key A primary key is a column of a combination of columns in a table that uniquely identifies a row in the table. The following are rules that make a column a primary key: A primary key column cannot contain a NULL value or an empty string. A primary key value must be unique within the entire table. A primary key value should not be changed over time.

According to these rules, the following are the recommendations for the primary keys: First, the primary key should be meaningless. Sometimes, you may want use meaningful data, which considers being unique, for the primary keys e. In such cases, it will create many data problems.

Oracle INSERT INTO SELECT

In the database world, the artificial keys are known as surrogate keys which are as opposed to natural primary keys. Second, the primary keys should be compact. The primary keys typically are numeric because Oracle typically processes numbers faster than any other data types. It is considered a best practice have a primary key in every table though it is not mandatory in Oracle.

Was this tutorial helpful? Yes No. Next Oracle Foreign Key. About Oracle Tutorial OracleTututorial. Programming Interfaces Python Oracle.My understanding for Primary key was that Oracle uses Unique Index to enforce primary key constraint on table's column to be unique.

Below is the code that I tried, in which I created Non-Unique Index on Primary Key column and tried to insert duplicate data but it still give error. So my question is how Oracle is enforcing Primary Key constraint. We can use a non-unique index to enforce a unique constraint.

This can be useful for a deferrable constraint, ie, you are allowed to violate it temporarily but the data must be valid at the time of commit.

Composite Primary Key in Oracle

You can also catch regular content via Connor's blog and Chris's blog. Or if video is more your thing, check out Connor's latest video and Chris's latest video from their Youtube channels. And of course, keep up to date with AskTOM via the official twitter account.

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Check out Chris Saxon's full fundamentals class. Questions Primary key with Non Unique Index. Question and Answer.

Oracle Tutorial - Insert into a table in different ways

Latest Followup. You Asked Hi Team, I was just playing around with some stuff so thought sharing with you. Hi Team, I have come across a puzzling case illustrated by Alex Fatkulin at Pythian whereby a Primary Key can have duplicates under certain conditions when using a deferred PK constraint.

Hi One common? This is useful e. More to Explore. Design New to good database design?


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