cara membuat nilai baris ke kolom secara dinamis di mysql

Karena tidak ada orang lain yang menjawab. Saya memberikan ide saya. Dasar untuk semuanya adalah

CREATE TABLE tank
(`Tank_ID` int, `Tank` varchar(6))
;

INSERT INTO tank
(`Tank_ID`, `Tank`)
VALUES
(1, 'Tank 1'),
(2, 'Tank 2'),
(3, 'Tank 3'),
(4, 'Tank 4'),
(5, 'Tank 5');

CREATE TABLE tank_detail
(`Tank_ID` int, `Receipt` int, `Date` date);

INSERT INTO tank_detail
(`Tank_ID`, `Receipt`, `Date`)
VALUES
(1, 1000, '2019-07-10'),
(2, 2000, '2019-07-10'),
(3, 3000, '2019-07-10'),
(1, 0, '2019-07-10'),
(1, 0, '2019-07-15'),
(3, 0, '2019-07-15'),
(2, 0, '2019-07-15'),
(3, 0, '2019-07-15'),
(1, 250, '2019-07-15'),
(2, 200, '2019-07-15'),
(3, 800, '2019-07-15'),
(1, 250, '2019-07-15'),
(4, 350, '2019-07-15'),
(1, 0, '2019-07-20'),
(2, 0, '2019-07-20'),
(3, 0, '2019-07-20'),
(4, 0, '2019-07-20'),
(1, 300, '2019-07-20'),
(2, 1200, '2019-07-20'),
(3, 1400, '2019-07-20'),
(4, 900, '2019-07-20'),
(5, 20, '2019-07-20'),
(1, 500, '2019-07-20');

Dari situ saya pertama-tama membuat pernyataan Sql statis

 Select Date,Sum(recsum) as Receipt
  , Sum(a1) as 'Tanl 1'
  , Sum(a2) as 'Tanl 2'
  , Sum(a3) as 'Tank 3'
  , Sum(a4) as 'Tanl 4'
  , Sum(a5) as 'Tanl 5'
 From
  (Select tank_detail.Tank_ID tankid,Date,Sum(Receipt) recsum
   , if (tank_detail.Tank_ID = 1, Sum(Receipt),0) as a1
   , if (tank_detail.Tank_ID = 2, Sum(Receipt),0) as a2
   , if (tank_detail.Tank_ID = 3, Sum(Receipt),0) as a3
   , if (tank_detail.Tank_ID = 4, Sum(Receipt),0) as a4
   , if (tank_detail.Tank_ID = 5, Sum(Receipt),0) as a5
  From tank_detail 
  Group by tank_detail.Tank_ID,Date) td1
 Group by Date  ;

Dan dari situ saya membangun prosedur tersimpan dengan loop

CREATE DEFINER=`root`@`localhost` PROCEDURE `procedure_Receipt_Tank`()
BEGIN
DECLARE bDone int DEFAULT 0;
DECLARE tanknumber int DEFAULT 0;
DECLARE tabkname VARCHAR(10);
DECLARE Tempvar LONGTEXT DeFAULT '';
DECLARE Tempvar2 LONGTEXT DeFAULT '';

DECLARE curs1 CURSOR FOR SELECT Tank_ID,Tank From tank;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET bDone = 1;

OPEN curs1;
SET Tempvar = CONCAT(Tempvar , 'Select Date,Sum(recsum) as Receipt ');
SET Tempvar2 = CONCAT(Tempvar2 , ' From ');
SET Tempvar2 = CONCAT(Tempvar2 , '(Select tank_detail.Tank_ID
tankid,Date,Sum(Receipt) recsum ');
read_loop: LOOP

    FETCH curs1 INTO tanknumber,tabkname;
    IF bDone = 1 THEN
        LEAVE read_loop;
    END IF;        
    SET Tempvar = CONCAT(Tempvar , ' , Sum(a',tanknumber,') as "',tabkname,'"');
    SET Tempvar2 = CONCAT(Tempvar2 , ', if (tank_detail.Tank_ID = ',tanknumber,',
    Sum(Receipt),0) as a',tanknumber,' ');
 END LOOP read_loop;
CLOSE curs1;
SET Tempvar = CONCAT(Tempvar ,Tempvar2,' From tank_detail ');
SET Tempvar = CONCAT(Tempvar ,' Group by tank_detail.Tank_ID,Date) td1');
SET Tempvar = CONCAT(Tempvar ,' Group by Date;');
SET @v_Query =  '';
SET @v_Query = CONCAT(@v_Query ,  Tempvar);
PREPARE stmt FROM @v_Query;
execute stmt;
#Select Tempvar;        
END

Anda dapat memanggilnya dengan menggunakan prosedur panggilan_Receipt_Tank();Saya pribadi akan menambahkan kerangka waktu di mana Anda menginginkan dataUntuk ini, Anda menambahkan ke prosedur tersimpan tanggal dari tanggal dan Anda juga harus menambahkan tanggal ke prosedur panggilan. Masalah terbesar adalah bahwa prosedur tersimpan ini membangun pernyataan Select, yang dieksekusi di akhir. tempvar adalah teks panjang dan bisa sampai 4 gb