Lightning:datatable example
<aura:component controller="AccountController1">
    
    
   <aura:attribute name="createAcc" type="Account" default="{'sObjectType' : 'Account','Name' : ''}"/>
    <aura:attribute name="objName" type="String" default="Account"/>
    <aura:attribute name="fldName" type="String" default="Rating"/>
   
    
   <aura:attribute type="Account[]" name="acctList"/>
    <aura:attribute name="mycolumns" type="List"/>
      
    <aura:handler name="init" value="{!this}" action="{!c.fetchAcc}"/>
    <div class="slds-p-around_small">
        <lightning:input type="Text" label="Name" value="{!v.createAcc.Name}"/>
        <lightning:input type="Text" label="Account Number" value="{!v.createAcc.AccountNumber}"/>
        <lightning:input type="Email" name="email2" value="{!v.createAcc.Email}" label="Email ID"/>
        <lightning:input type="Phone" label="Phone Number" value="{!v.createAcc.Phone}"/>
        <lightning:select label="Rating" value="{!v.createAcc.Rating}">
            <option value="">—None—</option>
            <aura:iteration items="{!v.ratingList}" var="ac">
                <option value="{!ac}">{!ac}</option>
            </aura:iteration>
        </lightning:select>
        <lightning:button label="Save" iconPosition="left" variant="brand" onclick="{!c.doSave}"/>
        <lightning:button label="Cancel" iconPosition="right" variant="destructive" onclick="{!c.docancel}"/>
    </div>
    
    
    
    
  
      
    <lightning:datatable data="{! v.acctList }"
                         columns="{! v.mycolumns }"
                         keyField="id"
                         hideCheckboxColumn="true"/>
      
</aura:component>


Controller

({
   fetchAcc : function(component, event, helper) {
        helper.fetchAccHelper(component, event, helper);
    },
      doSave : function(component, event, helper) {
        var action = component.get('c.createAccount');
        action.setParams({
            ac : component.get('v.createAcc')
        });
        action.setCallback(this,function(result){
            var getAllValue = component.get('v.createAcc');
            alert(JSON.stringify(getAllValue));
        });
          location.reload();
        $A.enqueueAction(action);
    },
    docancel : function(component, event, helper) {
        component.set('v.createAcc',"");
    },
})


helper


({
    fetchAccHelper : function(component, event, helper) {
        component.set('v.mycolumns', [
            {label: 'Account Name', fieldName: 'Name', type: 'text'},
                {label: 'Industry', fieldName: 'Industry', type: 'text'},
                {label: 'Phone', fieldName: 'Phone', type: 'Phone'},
                {label: 'Website', fieldName: 'Website', type: 'url '}
            ]);
        var action = component.get("c.fetchAccounts");
        action.setParams({
        });
        action.setCallback(this, function(response){
            var state = response.getState();
            if (state === "SUCCESS") {
                component.set("v.acctList", response.getReturnValue());
            }
        });
        $A.enqueueAction(action);
    }
})

Application
<aura:application extends="force:slds">
<c:LightningDatatableExample/>
</aura:application>


class

public class AccountController1
{
     @AuraEnabled
    public static List <Account> fetchAccounts() {
        //Qyery 10 accounts
        List<Account> accList = [SELECT Id, Name, BillingState, 
                                    Website, Phone, Industry, Type from Account ];
        //return list of accounts
        return accList;
    }
    
    
 /*    @AuraEnabled
    public static List<String> getPickList(String objName,String fldName) {
        List<String> pkList = new List<String>();Map<String,Schema.SObjectType> allObj = Schema.getGlobalDescribe();
        Map<String,Schema.SObjectField> allFlds = allObj.get(objName).getDescribe().fields.getMap();
        List<Schema.PicklistEntry> pickList = allFlds.get(fldName).getDescribe().getPickListValues();
        for(Schema.PicklistEntry pk : pickList){
            pkList.add(pk.getValue());
        }
        return pkList;
    }   */
    @AuraEnabled
    public static Account createAccount(Account ac){
        insert ac;
        return ac;
    }
}