Receiving and Displaying data of referenced record in Extbase/Fluid

Situation:

I have an (Extbase/Fluid) extension which stores a single DB reference from a specific database table (tt_address).

<internal_type>db</internal_type>
<allowed>tt_address</allowed>

Intention: I want to display data (some db fields) from this reference (only) in the frontend.

Problem: How do I get the stored reference in Extbase/Fluid and how do I get access to the data fields? in the frontend?

Typoscript:

    tt_content {
      addresscontainer = FLUIDTEMPLATE
      addresscontainer {
    
        templateName = AddressContainer
        templateRootPaths {
          10 = EXT:xyz/Resources/Private/Partials/ContentElements/
        }
        partialRootPaths {
          10 = EXT:xyz/Resources/Private/Partials
        }
        dataProcessing {
          1 = TYPO3\CMS\Frontend\DataProcessing\DatabaseQueryProcessor
          1 {
              options {
                    if.isTrue.field = records
                }
                table = tt_address
                #where = uid = 5
    
                pidInList = 20
                as = address_record
          }
        }
      }
    }

Flexform / XML:

    <?xml version="1.0" encoding="utf-8" standalone="yes" ?>
    <T3DataStructure>
        <sheets>
            <sDEF>
                <ROOT>
                    <TCEforms>
                        <sheetTitle>TT-Address - Single Address</sheetTitle>
                    </TCEforms>
                    <type>array</type>
                    <el>
                        <faddress>
                            <TCEforms>
                                <label>Single Address</label>
                                <config>
                                    <type>group</type>
                                    <internal_type>db</internal_type>
                                    <allowed>tt_address</allowed>
                                    <size>1</size>
                                    <maxitems>1</maxitems>
                                    <minitems>0</minitems>
                                    <show_thumbs>1</show_thumbs>
                                </config>
                            </TCEforms>
                        </faddress>
                    </el>
                </ROOT>
            </sDEF>
        </sheets>
    </T3DataStructure>

HTML:

<strong>{address_record.data.company}</strong><br>

The code is basically working. However, it fetches all records which are stored in the tt_address table. I want the one which was assigend in the backend only.

I hope my intention is clear.

Thank you in advance!

If you want to access the FlexForm value from your plugin or content element you can do that with the data type flexform:

dataProcessing {
  10 = TYPO3\CMS\Frontend\DataProcessing\DatabaseQueryProcessor
  10 {
    table = tt_address
    pidInList = 20
    uidInList.data = flexform:pi_flexform:faddress
  }
}

See the TypoScript Reference for details on the data type flexform.

If you're using TYPO3 v11, you can also use the brand new FlexForm Data Processor.