Fetch the desired result from below given DB table structure of MySQL - sql

Question

below are the table structures according to which I have to develop the desired output(given at the end)
tbl_docatr
docatr_id doc_id docatrtype_id docatr_float docatr_int docatr_date docatr_varchar docatr_blob
1 12 1 NULL NULL NULL testing [BLOB - NULL]
2 12 2 NULL NULL NULL Tesitng [BLOB - NULL]
tbl_docatrtype
docatrtype_id docatrtypegroup_id docatrtypetype_id docatrtype_name
1 1 4 Name
2 1 4 Company Name
tbl_docatrtypetype
docatrtypetype_id docatrtypetype_name
1 Float
2 Int
3 Date
4 String line
Above are three tables from which I have to display the desired output as
Name : testing
Company Name : Tesitng
such that at first step I have doc_id then I get docatrtype_id and then docatrtypetype_id acording to these values i have to fetch the result. Also the query must see the doactrtypetype_id from table tbl_docatrtypetype and fetch the result from tbl_docatr from respective column docatr_float, docatr_int, docatr_date, docatr_varchar, docatr_blob
UPDATE
I Have created the below PHP functions for the queries please help me to get the easy one
function getDocumentDetail($doc_id){
$arr_document_detail = array();
$query = "SELECT * FROM tbl_doc WHERE doc_id = '".$doc_id."'";
$this->connect->executeQuery($query, $this->connect->conn);
if($this->connect->numRows() > 0) {
while($row = $this->connect->getRowArr()){
$arr_document_detail = $row;
}
}
return $arr_document_detail;
}
//Getting Attribute Details
function getAttributeDetails($doc_id){
$arr_attrtype_id = array();
$query = "SELECT
docatrtype_id,
docatr_float,
docatr_int,
docatr_varchar,
docatr_date,
docatr_blob
FROM
tbl_docatr
WHERE
doc_id = '".$doc_id."'";
$this->connect->executeQuery($query, $this->connect->conn);
if($this->connect->numRows() > 0){
$j = 0;
while($row1 = $this->connect->getRowArr()){
$arr_attrtype_id[$j] =$row1;
$j++;
}
}
return $arr_attrtype_id;
}
function getAttrTypetype($attrtype_id){
$arr_attrtypetype = array();
$query = "SELECT
docatrtype_name,
docatrtype_id,
docatrtypegroup_id,
docatrtypetype_id
FROM
tbl_docatrtype
WHERE
docatrtype_id = '".$attrtype_id."'";
$this->connect->executeQuery($query, $this->connect->conn);
if($this->connect->numRows() > 0){
$i = 0;
while($row1 = $this->connect->getRowArr()){
$arr_attrtypetype[$i] =$row1;
$i++;
}
}
return $arr_attrtypetype;
}
function getAttrtypetypedetail($attrtypetype_id){
$arr_attrtypetype_detail = array();
$query = "SELECT
docatrtypetype_name,
docatrtypetype_id
FROM
tbl_docatrtypetype
WHERE
docatrtypetype_id = '".$attrtypetype_id."'";
$this->connect->executeQuery($query, $this->connect->conn);
if($this->connect->numRows() > 0){
$i = 0;
while($row1 = $this->connect->getRowArr()){
$arr_attrtypetype_detail[$i] =$row1;
$i++;
}
}
return $arr_attrtypetype_detail;
}
UPDATE--2 as per #Danosaure
select concat(dat.docatrtype_name, ':',
case dat.docatrtypetype_id
when '1' then da.docatr_float
when '2' then da.docatr_int
when '3' then da.docatr_date
when '4' then da.docatr_varchar
when '5' then da.docatr_blob
end) as 'Value'
from tbl_docatr da
inner join tbl_docatrtype dat using (docatrtype_id)
inner join tbl_docatrtypetype datt using (docatrtypetype_id)
WHERE da.doc_id=33
ORDER BY da.docatr_id;

Answer 1

For the sake of "integrity", you should add a (5, 'Blob') row to tbl_docatrtypetype.
select dat.docatrtype_name,
case datt.docatrtypetype_name
when 'Float' then da.docatr_float
when 'Int' then da.docatr_int
when 'Date' then da.docatr_date
when 'String line' then da.docatr_varchar
else da.docatr_blob
end as 'Value'
from tbl_docatr da
inner join tbl_docatrtype dat using (docatrtype_id)
inner join tbl_docatrtypetype datt using (docatrtypetype_id)
WHERE da.doc_id=12
ORDER BY da.docatr_id;
EDIT: Added doc_id specific values per OP comment.