Apex Intermediate Progress | ( Lessons)

Lesson: 20 | Update the Field Number Of Contacts

User Story

Create a program that updates the field Number_of_Contacts__c

The field Number of Contacts must show the number of the Contacts each Account has

Hint: Create a field (Number_of_Contacts__c ) with Number data type

Code

public static void UpdateNumberofContacts(){
        
        List<Account> acList = [SELECT Id, (SELECT Id FROM Contacts), Number_of_Contacts__c FROM Account WHERE Id  IN (SELECT AccountId FROM Contact)];
        
        
        for(Account ac : acList){
            
            ac.Number_of_Contacts__c=ac.Contacts.size();
        }
        
        update acList;
        
        
    }

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A. Apex DML Operations (8 lessons)

B. Apex Classes (17 lessons)

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E. Asynchronous Apex (6 lessons)

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H. Apex Fast Recap (142 lessons)

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Lesson: 20 | Update the Field Number Of Contacts

User Story

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Apex Intermediate

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Lesson: 20 | Update the Field Number Of Contacts

User Story

Apex Intermediate