Description When attempting to mark a field as Unique, Salesforce builds an index for that field. If the unique index contains duplicate values (e.g. if there are multiple existing records which have the same value in the field we are trying to make unique), then the operation will fail and the Unique attribute will not be set.
How do I Index a field in Salesforce?
If this is the standard Account Number field, it will already be indexed by Salesforce. If it is a custom field you have added, you can self-service an index on a field by making it an "External ID" - click through the setup menu to customise the field and select the option from General Options.
When is a filter not selective in Salesforce?
Consider an indexed filter or contact salesforce.com about custom indexing. Even if a field is indexed a filter might still not be selective when: 1. The filter value includes null (for instance binding with a list that contains null) 2.
What happens when you insert or upsert in bulk in Salesforce?
Now, you when insert or upsert in bulk, salesforce will try to perform this operation in bulk. This means when it tries insert the values, it tries to create 2 records with the same member id (ie. 1 and 2).
How to flag duplicate records in a database?
If any of the records are duplicate flag them in a way and insert remaining and end of the process just email the remaining (duplicate records ) For above you can use some kind of wrapper class in which you can hold the flagged data
Can unique index have duplicate values?
No, you cannot create a Unique Index on a table that has duplicate values.
Does unique index prevent duplicates?
You can prevent duplicate values in a field in an Access table by creating a unique index. A unique index is an index that requires that each value of the indexed field is unique.
Can set contain duplicates apex?
A set is an unordered collection of elements that do not contain any duplicates. Set elements can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types.
What happens if we trying to add duplicate values in set apex?
If we insert duplicate values to the Set, we don't get any compile time or run time errors. It doesn't add duplicate values in the set. Below is the add() method of the set interface in java collection that returns Boolean value either TRUE or FALSE when the object is already present in the set.
Which field Cannot contain duplicate values?
Multi-valued lookup or attachment fields cannot contain duplicate values.
Can non clustered index have duplicate values?
Unique Non Cluster Index only accepts unique values. It does not accept duplicate values. After creating a unique Non Cluster Index, we cannot insert duplicate values in the table.
Can a Map have duplicate keys?
Duplicate keys are not allowed in a Map. Basically, Map Interface has two implementation classes HashMap and TreeMap the main difference is TreeMap maintains an order of the objects but HashMap will not.
Can Hashtable have duplicate keys?
You can't add duplicate keys to hashtables, because hashtables by design can only contain unique keys. If you need to store duplicate key/value pairs, use arrays.
What is the difference between Set and List in Salesforce?
A List is an ordered collection of elements that are distinguished by their indices. List elements can be of any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types. Whereas, Set is an unordered collection of elements that do not contain any duplicates.
How do you prevent duplicates in Salesforce?
Here are three ways to use a duplicate rule to handle duplicates, using leads as an example.Alert sales reps when they're about to create a duplicate lead. ... Block sales reps from creating duplicate leads. ... Prevent reps from creating duplicates of records they don't have permission to view.
Can we store duplicate values in Set?
A Set is a Collection that cannot contain duplicate elements. It models the mathematical set abstraction. The Set interface contains only methods inherited from Collection and adds the restriction that duplicate elements are prohibited.
How do I manage duplicate records in Salesforce?
On a duplicate record set list view, click New. Specify a duplicate rule (in the Duplicate Rule field) or a duplicate job (in the Parent field). In Lightning Experience, in the Related tab, click New. In Salesforce Classic, on the duplicate record set detail page, click New Duplicate Record Item.
What to do if a record is duplicated?
If any of the records are duplicate flag them in a way and insert remaining and end of the process just email the remaining (duplicate records )
Can XML be dynamically generated?
Anup, yes this might be the case, as XML is dynamically being generated in bulk. Now the challenge is to put everything in unique set. But here, it will create/insert new records only if it doesn't exist (checked in checkForAccount () method). I am not able give any explanation to myself.
