Duplicate values generated by Oracle Sequence

From past few days we are facing some weird issue in our application where the sequences seems to be generating duplicate values.

Duplicate values returned from native Oracle sequence

Oracle sequences are guaranteed not to generate duplicate values. If you are seeing duplicate values, one of two things must be happening. You must have hit ...

Duplicate value while sequence is used in side a function

The database version is 12.1.0.2.0 - 64bit. In our existing code, we are using a function to generate unique values for Primary Key. The ...

Ho can oracle sequence generate duplicate values?

The error indicate there is a duplicate value (for primary key) generated from oracle sequence? How come. I thought the sequence.nextval always generates new ...

Oracle: create sequence number for repeated rows - Stack Overflow

I have a table with 3 columns: ID VALUE SEQ 1 100 2 100 3 200 4 200 5 200 Whenever value in column "VALUE is repeated in further rows, value in column "SEQ" ...

what happens if a sequence generates a number that already exists ...

Simply select the current max value. · it is an existing sequence - the standard is to reuse the same sequence for a set of tables. · You can ...

Why a Sequence gives duplicate values! - YouTube

It is common knowledge that every time you request the next value from a sequence, you get a new number. That is the entire purpose of ...

Solved: Duplicate sequence.nextval - Experts Exchange

nextval from dual" and get a value. ... prohibiting duplicates. When the legacy app is actively adding records to the table and I make a call for ...

Duplicate values found in column which is auto ... - My Oracle Support

Duplicate values found in column which is auto generated with Oracle sequence value. Table EMP have two columns in which CUST_NUM is auto ...

Oracle returning the Duplicate sequence number in a Clustred ...

Oracle will never return duplicates when you select nextval from a sequence. You can be 100% certain of this. ... It's always possible that there's a bug but, ...

Sequence Next val give duplicate values - Oracle Forums

I have checked my sequence and confirmed that i was created with "No Cache" option , no max value and nocycle. ... START WITH 24 NOCACHE NOORDER ...

Sequence numbers (getting duplicate number?) - Oracle Communities

In a package we use a sequence number as the primary key for insert into a table. We can have several sessions hitting this procedure at the ...

Oracle sequence returning duplicate key for a given key name

will generate an (unhandled)exception ORA-00955. So what value do you assign then, must be somewhere in the rest of your code (if keyval is null ...

Oracle sequences – 12c features including "identity" - Simple Talk

If you want to add an identity column to a table with existing data, then Oracle will lock the table before using the generated sequence to ...

Duplicate Values in a Sequence - ORACLE

Duplicate Values in a Sequence · 1.extract the definition from dba_sequences · 2.Take the invalid object count(why becoz dependents objects in db ...

Issue with DB sequence- duplicate values - Oracle Forums

The Serial Number column is of NUMBER (10,0) in the database and the actual value is populated using a DB trigger. The EO data type is set as oracle.jbo.domain.

Oracle Sequences: RAC - Simple Talk - Redgate Software

Sequences with ORDER. If you're running single-instance Oracle, then your sequence values are always generated in order. Some of the values may ...

Query to get duplicate records then update it by putting a sequence ...

I was trying to get all records with duplicate data and update it by putting a sequence number. ... You may enumerate rows (for example, using ...

How to define an auto increment primary key in Oracle - Atlassian

As discussed in the documentation, a sequence in Oracle prevents duplicate values from being created simultaneously because multiple users are effectively ...

Oracle 12c - GENERATED BY DEFAULT AS IDENTITY generates ...

What you can do is fetching a new ID value from this sequence generator and use this number (ISEQ$$_12345.nextval). Oracle will not try to reuse the same number ...