Updating primary key sql

But, if you want to update the primary key you certainly can and Tara showed some code for how to do that. NET and using datasets and such that you are changing and need to persist back the database, then it sounds like you might have an issue with your . But, I also suspect that since the PK has changed .

NET might be inclined to insert a new row instead up updating the existing row in that scenario..? Brett and Tara are saying that it is considered bad practice to update/change a primary key.

clause where you specify a list of column-value-pair assignments in case of duplicate.

Basically, the statement first tries to insert a new row into the table.

The PRIMARY KEY constraint uniquely identifies each record in a table.

You have to make sure you have enough space for this.When modifying a constraint, the constraint can be identified using either the constraint name or the columns in the constraint definition along with the type of the constraint.Primary keys can also be identified using the PRIMARY KEY keyword, because each table can have only a single primary key. rename table or swap table with another table, the constraints are updated to reflect the changes.Such statements produce a warning in the error log when using statement-based mode and are written to the binary log using the row-based format when using statement against a table having more than one unique or primary key is also marked as unsafe.(Bug #11765650, Bug #58637) See also Section, “Advantages and Disadvantages of Statement-Based and Row-Based Replication”.

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