Hi Andrew, If you want to query on multiple objects, You can do this in 2 way: either using subquery or using parent relationship name.
Full Answer
What is the Lightning Platform query optimizer?
The Lightning Platform query optimizer helps the database’s optimizer produce effective queries by providing efficient data access in Salesforce. Where possible, we changed noninclusive terms to align with our company value of Equality.
How to retrieve multiple objects using soql?
If you want to retrieve mutiple object using SOQL then you can use Parent/ Child Relation ship in SOQL . 2. And aslo you can retrieve multiple object uisng SOSL .
Is it possible to retrieve multiple objects from SOSL?
And aslo you can retrieve multiple object uisng SOSL . Please find below example : If it helpful for you . Please mark best answer. Mohammad Rafi. Retrieving the sub query lists...
How to get attachment body and custom object fields in soql?
You have to use two SOQL to get attachment body and custom object fields. either using subquery or using parent relationship name. Note: add as many fields you want in the query.
How do I get data from two objects in Salesforce?
Yes we can retrieve data from multiple objects in a single query using SOSl. for eg. List
Which two objects can be queried with SOQL?
Introduction to Salesforce Object Query Language(SOQL) It can retrieve data from a single object or multiple objects that are related to one another. Not only can it traverse the data from number, date, or checkbox fields but also sort results as part of the query.
Can we use 2 order by in SOQL?
You can have more than one ORDER BY clause.
How do I join objects in SOQL query?
Joining Related Salesforce Objects in SOQLChild with parent. When querying from the child object we can include the parent object using dot notation ( [object].[field] ): SELECT FirstName, LastName, Account.Name FROM Contact. ... Parent with children. ... Custom objects.
How do I compare two field values in SOQL?
Salesforce does not allow direct field to field comparison in SOQL query. To achieve this you can create a formula field that will compare fields and return a value (such as true or false) which you can use in a WHERE clause.
How do I query a related list record in Salesforce?
You can use a subquery: SELECT Id, Name, (SELECT Id, Name FROM Approvers__r) FROM opportunity. In Visualforce pages with a standard controller, you can use the apex:relatedList component to automatically show the list as it would have shown in the page layout.
Can we group by two columns in SOQL?
＊Amazingly,SOQL supports groupping with multiple fields.
What is SOSL in Salesforce?
Salesforce Object Search Language (SOSL) is a Salesforce search language that is used to perform text searches in records. Use SOSL to search fields across multiple standard and custom object records in Salesforce. SOSL is similar to Apache Lucene.
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.
How do I link two custom objects in Salesforce?
In the custom field wizard:Choose Master-Detail Relationship as the field type.Select one of the objects to relate to your junction object. For example, select Case . ... Select a Sharing Setting option. ... For the Related List Label that will display on the page layout of the master object, do not accept the default.
Can we use joins in SOQL?
In SOQL statements, Inner and Outer Joins are used to join related objects like parent object and child objects to retrieve all related fields from base objects including the records of non refer related object.
How do I query Sobject in Salesforce?
If you have the sobject name in a string, e,g, 'sobjname', you can then query back the record via something like: String queryStr='select id from ' + sobjname; List
Creating Efficient Queries
When you’re working with large volumes of data, it’s important to build efficient SOQL queries, reports, and list views, which all depend on selectivity and indexes. The Lightning Platform query optimizer determines filter condition selectivity for a SOQL query, report, or list view.
Determine the Selectivity of Your Filter Condition
To better understand selectivity, let’s use an example. You build a SOQL query, report, or list view for the Opportunity object, one of the largest objects in your org. You have a filter condition, for example, a WHERE clause that fetches only the rows you want from the object.
Determine the Selectivity of More Complex Filter Conditions
Using GROUP BY ROLLUP in a query similar to the previous example makes it easy to get the necessary statistics to evaluate the selectivity of various conditions.
Understand the Impact of Deleted Records on Selectivity
When gathering selectivity statistics, you can incorporate or exclude deleted records using the Boolean field, IsDeleted. This field is available in every standard and custom object.
