Slaesforce FAQ

what is collections in salesforce

by Dr. Jedidiah Altenwerth Published 2 years ago Updated 2 years ago
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Salesforce CRM

Customer relationship management

Customer relationship management (CRM) is an approach to managing a company’s interaction with current and future customers. The CRM approach tries to analyze data about customers' history with a company, in order to better improve business relationships with customers, specifically focusing on retaining customers, in order to drive sales growth.

collections are the filtered results of existing global views of your connected Salesforce objects. Manual collections don’t change unless you specifically add or remove content from them. Conditional collections set up filters to dynamically select from the available content at any given time.

Collections in Salesforce are various types that can contain numerous records. In other words, collections are groups of records that are of a similar type. Collections have the ability to dynamically rise and shrink depending on the business needs. Collections in Apex can be lists, sets, or maps.

Full Answer

What is the difference between list and collection in Salesforce?

What is the Collection in Salesforce? The collection is the type of variables that can store multiple numbers of records. It can increase and decrease dynamically. It creates a new instance of the List class. A list can hold elements of any data type. A list is an interface.

What is map collection in Salesforce?

Don't forget to check out: Campaigns In Salesforce - All You Need to Know Map is the most powerful type of collection. It works in pairs of elements, never as a single value like List and Set. Map has pairs in the format of key and value.

What is list in Salesforce?

A list is an ordered collection of typed primitives, sObjects, user-defined objects, Apex objects or collections that are distinguished by their indices. A list is an ordered collection so use list when you want to identify the list element based on Index Number.

What is the difference between collection and list in Java?

The collection is the type of variables that can store multiple numbers of records. It can increase and decrease dynamically. It creates a new instance of the List class. A list can hold elements of any data type.

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What are different types of collections in Apex?

There are three different types of collections in apex: List, Set and Map. Collections are composite data types which allow the developer to aggregate, or collect, multiple other types into a single variable.

What is difference between list and set in Salesforce?

The list is a type of ordered collection that maintains the elements in insertion order, Set is a type of unordered collection and Map is a collection of key-value pairs.

What do you understand by data collection in Salesforce?

Data collections are simply groupings of any data type. You'll use data collections often because they go hand in hand with SOQL. Lists are the first and most important of the three data types: List peopleToSpam = [SELECT Id, Email FROM Contact];

What is collection list set map in Salesforce?

MapsCollection TypeDescriptionListAn ordered group of items of the same type. Each item has an index number that represents its position in the list.SetAn unordered group of unique items of the same type.MapA collection of key-value pairs. Each unique key maps to a single value.

What is trigger in Salesforce?

Apex triggers enable you to perform custom actions before or after changes to Salesforce records, such as insertions, updates, or deletions. A trigger is Apex code that executes before or after the following types of operations: insert. update. delete.

What is map in Salesforce?

Map: A map is a collection of key-value pairs where each unique key maps to a single value. Keys can be any primitive data type, while values can be a primitive, sObject, collection type or an Apex object.

Why collections are used in Apex?

List, Set and map are collections used in apex. These are useful when governor limits are reached to a limit while querying records inside the for loop. Instaed of writing query and reaching the limit we can use set to get ID's of the records and iterate through it.

What is CDC in Salesforce?

Change Data Capture is a streaming product on the Lightning Platform that enables you to efficiently integrate your Salesforce data with external systems. With Change Data Capture, you can receive changes of Salesforce records in real time and synchronize corresponding records in an external data store.

How do I create a collection in Salesforce?

To create a static collection of specific content, choose the content type you want to include, and select Manually. beside the content items to add them. Click Finish. Your collection list is the result of what you selected and the order that items appeared in the list, but you can reorder them.

What is difference between list and Set?

List is an ordered sequence of elements whereas Set is a distinct list of elements which is unordered.

What is Apex list?

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.

What is SOSL and SOQL in Salesforce?

A SOQL query is the equivalent of a SELECT SQL statement and searches the org database. SOSL is a programmatic way of performing a text-based search against the search index. Whether you use SOQL or SOSL depends on whether you know which objects or fields you want to search, plus other considerations.

What is difference between list and Set?

List is an ordered sequence of elements whereas Set is a distinct list of elements which is unordered.

What is a list in Salesforce?

A list is like an array, a sequential collection of elements with first index position as zero. List can contain elements of primitive types, sObjects, user-defined objects, Apex objects or even other collections. A list can contain up to four levels of nested collections. List can contain duplicate elements.

What is difference between list Set and map in 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. A map is a collection of key-value pairs where each unique key maps to a single value.

What is Set in Salesforce?

A Set in Salesforce is an unordered collection of elements that contain any type of data type like primitive types, collections, sObjects, user-defined types, and built-in Apex types. Set methods in Salesforce do not allow duplication. The insertion order is not preserved in the Set.

What is a list in Salesforce?

Lists act as a storage container in the salesforce platform. Any objects that are identified to be apex type can be stored in the file. The list is always identified as 0, just like javascript. For further understanding, an example is presented below:

Why use groups in salesforce?

Using groups, business operations can be made faster. This is the reason why salesforce professionals can find one client in the database of millions. Also, you should know that using collection salesforce is kind of like using the javascript.

What is map method in Salesforce?

Salesforce map methods are a way to see the value of a variable. Since each variable has its own set of unique. Take a look at the example below to understand the map method in salesforce

Is there a limit to the number of collections in Salesforce?

Earlier, there was a limitation on the collection. Now there no limit to the number of collections, but there is a specific limit to the collection.

Does Salesforce have a CRM?

Salesforce has developed a CRM that has caused revolutions in the technology industry. Earlier record management for different clients was very tough for customers since they did not have software that will manage millions of clients records in one place. Things started to get better when people began to know about collections in salesforce.

There are 3 types of collection

It creates a new instance of the List class. A list can hold elements of any data type. A list is an interface. A list is an ordered collection of typed primitives, sObjects, user-defined objects, Apex objects or collections that are distinguished by their indices.

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Collections

A collection is a type of variable that can store multiple items. In our tea example, we have a sugar bowl with several sugar cubes inside it. The sugar bowl is considered a collection and the sugar cubes are items that are stored in that collection.

Lists

An Apex list is an ordered group of items of the same type, like a shopping list.

Declare an Empty List

In the Developer Console, click Debug | Open Execute Anonymous Window.

Declare a List with a Set Size

If we know exactly how long our list needs to be, we can set the size when we declare the list. We do this by including the size in brackets, [ ], after the data type, like this:

Initialize a List

Initializing a list is assigning initial values to a list. There are two ways to add items to a list:

Demystifying Lists

Different ways of adding items to a list produce slightly different results; sometimes unexpected results. Try this exercise.

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