How to fix ORA 30926 unable to get a stable set of rows in the source tables?
A further clarification to the use of DISTINCT to resolve error ORA-30926 in the general case: You need to ensure that the set of data specified by the USING() clause has no duplicate values of the join columns, i.e. the columns in the ON() clause.
What is non deterministic where clause?
The key is the non-deterministic where clauses phrase. That phrase means that the the query inside the USING clause returns a non-unique set of rows. The returned rows can’t be matched uniquely against the target table in the ON clause.
How can I delete duplicate records in Oracle?
Use the rowid pseudocolumn. DELETE FROM your_table WHERE rowid not in (SELECT MIN(rowid) FROM your_table GROUP BY column1, column2, column3); Where column1 , column2 , and column3 make up the identifying key for each record. You might list all your columns.
What is nondeterministic function?
Nondeterministic functions result in different output each time they are called with a fixed set of input values even if the database state that they access remains the same. For example, GETDATE() function, results the current date and time value, always a different value.
What are the implications of using nondeterministic functions?
Functions can be either deterministic or nondeterministic. A deterministic function always returns the same results if given the same input values. A nondeterministic function may return different results every time it is called, even when the same input values are provided.
How can we prevent duplicate insert in Oracle?
- Create a VIEW for your table ( SELECT * FROM MyTable);
- Create an INSTEAD-OF INSERT trigger ON the view that does the insert.
- Create an UNIQUE INDEX “MyUniqueIndexName” on the columns you need to avoid duplicates.
- Use the following EXCEPTION section on the TRIGGER:
What does it mean for a machine model to be nondeterministic?
A non-deterministic Turing machine is a theoretical type of computer in which specific commands may allow for a range of actions, rather than a specific command leading to only one allowable action in the deterministic model of computing.
What is deterministic and nondeterministic?
What are the differences between both deterministic and nondeterministic?
A deterministic function always returns the same results if given the same input values. A nondeterministic function may return different results every time it is called, even when the same input values are provided.
How do I fix Ora 00001?
There are a few solutions to the “ORA-00001 unique constraint violated” error:
- Change your SQL so that the unique constraint is not violated.
- Change the constraint to allow for duplicate values.
- Drop the constraint from the column.
- Disable the unique constraint.