lightningDataTable.cmp

<aura:component controller="ContactRecordListApex" implements="flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId" access="global">
    <aura:attribute name="myData" type="Object"/>
    <aura:attribute name="myColumns" type="List"/>
    <aura:attribute name="recordId" type="string"/>
    <aura:handler name="init" value="{!this}" action="{!c.init}"/>
     <lightning:datatable data="{! v.myData }"
        columns="{! v.myColumns }"
        keyField="Id"
        hideCheckboxColumn="false"
                          aura:id="contactDatatable"
        onsave="{!c.saveTable}"/>
</aura:component>