Commission_JSON__c": "{\n  \"totalCommission\" : 100,\n  \"isEditable\" : true,\n  \"CommissionWrapperList\" : [ {\n    \"isEditable\" : true,\n    \"employeeName\" : \"Salman Ahmad\",\n    \"employeeId\" : null,\n    \"employeeCommission\" : 100\n  } ]\n}"

How to convert in json format with soql query? 

1. Client wants only upto 10 records to be created on the Account object daily. Write code which will run every 15 minutes. It will check for Account object records created in last 24 hour period (12 am to 12 pm).  If the count exceeds 10, delete the additional records. Counter will reset at 12 am to 0.  Please Any Solution.TIA.

1.    CRUD Operation on SObject:
•    Create custom object and Show list view of records with pagination. •    Perform custom create, edit, delete functionality. 
Any Solution for this.Thanks in advance

1. Custom Approval Page:

• Create Visualforce page that will show current login users’ Approval request
• He should able to accept and reject those from same page with description.
• There should be provision to multi-accept or mulit-reject.
• List view should be there to show update coming and past requests.                                                                                         Any Solution for this. Thanks in advance

1. Custom Approval Page:

• Create Visualforce page that will show current login users’ Approval request
• He should able to accept and reject those from same page with description.
• There should be provision to multi-accept or mulit-reject.
• List view should be there to show update coming and past requests.                                                                                         Any Solution for this. Thanks in advance