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Oct 14th, 2019
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  1. public with sharing class WeekSixHomework {
  2.  
  3. public static void soqlPractice() {
  4.  
  5. //1. Below is a SOQL query that should be returning the top 5 Accounts in our org based on Annual Revenue.
  6. //Something's not quite right, can you fix the query?
  7. List<Account> topFiveAccounts = [SELECT Id, Name, AnnualRevenue FROM Account WHERE AnnualRevenue != 0 ORDER BY AnnualRevenue DESC LIMIT 5];
  8.  
  9. System.debug('This should be 5: ' + topFiveAccounts.size());
  10.  
  11.  
  12. //2. Here is a query that is missing something. It compiles, but if you try and run this method in Anonymous
  13. //you'll get an error when the method tries to use the query results. Fix it! :)
  14.  
  15. List<Contact> contacts = [SELECT FirstName,LastName, MailingState FROM Contact LIMIT 10];
  16.  
  17. for (Contact c : contacts) {
  18. String name = c.FirstName + ' ' + c.LastName;
  19. }
  20.  
  21.  
  22. //3. Can you write a SOQL query from scratch that will return the top 10 Accounts in the org, ordered by annual
  23. //revenue in decending order? Print your results in the debug log.
  24. List<Account> AccountsNew = [SELECT Id, Name, AnnualRevenue FROM Account WHERE AnnualRevenue != 0 ORDER BY AnnualRevenue DESC];
  25.  
  26. System.debug('This should be ' + AccountsNew);
  27.  
  28.  
  29. //4. Can you write a SOQL query that will return all opportunities for all accounts in the topFiveAccounts list that we used
  30. //in Number 1? (topFiveAccounts) Hint: If you're stuck, look back a the code in WeekSixClassExercises, getOpenOppsForHotAccounts method
  31. // Print your results in the debug log.
  32.  
  33. List<Opportunity> hotAccountsOpenOpps = [SELECT Id, Name FROM Opportunity WHERE AccountId in:topFiveAccounts];
  34.  
  35. //Let's see those opportunities!
  36. System.debug('Our Hot Account Opportunities: ' + hotAccountsOpenOpps);
  37.  
  38.  
  39.  
  40. }
  41.  
  42.  
  43.  
  44. public static void forTheLoveOfForLoops() {
  45.  
  46. //1. Take a look at the list and loop below. It's commented out since it can't run as is.
  47. // Can you replace the ?? with the number that makes sense based on the comments?
  48. // Remove the slashes and compile.
  49. // Can you add an extra counter variable so that you can print out how many times the loop ran in total?
  50.  
  51.  
  52. //This loop should run 5 times
  53. integer J;
  54. for (Integer i=0; i<6; i++) {
  55.  
  56. J = i+1;
  57. System.debug('i is now: '+i);
  58.  
  59. }
  60. System.debug('Number of loops' +J);
  61.  
  62. //2. Below is a loop that iterates through a list. Can you change it to use the new For Loop syntax? It should print out
  63. //each account name in the debug log when you're done.
  64. //Use the list size to tell you how many loops, and use indexing to fetch values. If you need help, check the
  65. //loopingThroughLists method in WeekSixClassExercises for hints
  66.  
  67. List<Account> accountList = [SELECT Id, Name FROM Account LIMIT 5];
  68.  
  69.  
  70. for (Integer i = 0; i<accountList.size(); i++){
  71.  
  72. Integer count = i+1;
  73.  
  74. System.debug('Account'+count+': '+ accountList[i]);
  75. }
  76.  
  77.  
  78. }
  79.  
  80.  
  81. }
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