mysqlのIDごとに2つの日付の間に日付リストを生成する方法

Question

ここにはそれぞれIDのテーブルデータがあり、これをパラメータとして渡して各IDの日付リストを生成してテーブルに挿入する必要があります。

ID startdate enddate 
1 2016-01-01 2020-12-31 
2 2017-01-01 2020-12-31 
3 2018-01-01 2020-12-31 
4 2019-01-01 2020-12-31 
5 2020-01-01 2020-12-31 

パラメータを介して単一の値は、このストアドプロシージャの実行：以下

DELIMITER @@ 
DROP PROCEDURE make_intervals @@ 
CREATE PROCEDURE vtproject.make_intervals 
(IN `startdate` DATE, IN `enddate` DATE) 
BEGIN 
    declare thisDate DATE; 
    declare nextDate DATE; 
    declare intval integer; 
    declare unitval varchar(10); 

    set thisDate = startdate; 
    set intval = 1; 
    set unitval = 'YEAR'; 

    drop temporary table if exists year_intervals; 
    create temporary table if not exists year_intervals 
     (
     interval_start DATE, 
     interval_end DATE 
    ); 

    repeat 
     select 
     case unitval 
      when 'MICROSECOND' then timestampadd(MICROSECOND, intval, thisDate) 
      when 'SECOND'  then timestampadd(SECOND, intval, thisDate) 
      when 'MINUTE'  then timestampadd(MINUTE, intval, thisDate) 
      when 'HOUR'  then timestampadd(HOUR, intval, thisDate) 
      when 'DAY'   then timestampadd(DAY, intval, thisDate) 
      when 'WEEK'  then timestampadd(WEEK, intval, thisDate) 
      when 'MONTH'  then timestampadd(MONTH, intval, thisDate) 
      when 'QUARTER'  then timestampadd(QUARTER, intval, thisDate) 
      when 'YEAR'  then timestampadd(YEAR, intval, thisDate) 
     end into nextDate; 

     insert into year_intervals select thisDate, dateadd(DAY, -1, nextDate); 
     set thisDate = nextDate; 
    until thisDate >= enddate 
    end repeat; 
    select * from year_intervals; 
END @@ 
DELIMITER ; 

Answer 1

2つのバージョン。最初は1組の日付を使って行います。 2番目のバージョンでは、カーソルを介してテーブル全体を一度に処理します。

バージョン1：

DROP PROCEDURE if exists make_intervals; 
DELIMITER @@ 
CREATE PROCEDURE make_intervals 
(IN `startdate` DATE, IN `enddate` DATE) 
BEGIN 
    declare thisDate DATE; 
    declare nextDate DATE; 
    declare intval integer; 
    declare unitval varchar(10); 

    set thisDate = startdate; 
    set intval = 1; 
    set unitval = 'YEAR'; 

    drop temporary table if exists year_intervals; 
    create temporary table if not exists year_intervals 
     (
     interval_start DATE, 
     interval_end DATE 
    ); 

    repeat 
     select 
     case unitval 
      when 'MICROSECOND' then timestampadd(MICROSECOND, intval, thisDate) 
      when 'SECOND'  then timestampadd(SECOND, intval, thisDate) 
      when 'MINUTE'  then timestampadd(MINUTE, intval, thisDate) 
      when 'HOUR'  then timestampadd(HOUR, intval, thisDate) 
      when 'DAY'   then timestampadd(DAY, intval, thisDate) 
      when 'WEEK'  then timestampadd(WEEK, intval, thisDate) 
      when 'MONTH'  then timestampadd(MONTH, intval, thisDate) 
      when 'QUARTER'  then timestampadd(QUARTER, intval, thisDate) 
      when 'YEAR'  then timestampadd(YEAR, intval, thisDate) 
     end into nextDate; 

     insert into year_intervals select thisDate, date_add(nextDate,INTERVAL -1 DAY); 
     set thisDate = nextDate; 
    until thisDate >= enddate 
    end repeat; 
    select * from year_intervals; 
END @@ 
DELIMITER ; 

試験（2つの異なるパラメータ、テーブル全体でリワーク）

call make_intervals('2016-01-01','2020-12-31'); 
+----------------+--------------+ 
| interval_start | interval_end | 
+----------------+--------------+ 
| 2016-01-01  | 2016-12-31 | 
| 2017-01-01  | 2017-12-31 | 
| 2018-01-01  | 2018-12-31 | 
| 2019-01-01  | 2019-12-31 | 
| 2020-01-01  | 2020-12-31 | 
+----------------+--------------+ 

バージョン2：

create table myT 
( ID INT auto_increment primary key, 
    startdate DATE NOT NULL, 
    enddate DATE NOT NULL 
); 
INSERT myT(startdate,enddate) values 
('2016-01-01','2020-12-31'), 
('2017-01-01','2020-12-31'), 
('2018-01-01','2020-12-31'), 
('2019-01-01','2020-12-31'), 
('2020-01-01','2020-12-31'); 

DROP PROCEDURE if exists make_intervals_v2; 
DELIMITER @@ 
CREATE PROCEDURE make_intervals_v2 
( IN unitval VARCHAR(10), 
    IN intval INT 
) 
BEGIN 
    DECLARE done INT DEFAULT FALSE; 
    DECLARE thisDate,nextDate DATE; 
    -- declare intval integer; 
    DECLARE l_ID integer; 
    DECLARE l_startdate,l_enddate DATE; 
    DECLARE theCursor CURSOR FOR SELECT ID,startdate,enddate from myT; 
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; 

    drop temporary table if exists year_intervals2; 
    create temporary table year_intervals2 
    ( id int AUTO_INCREMENT primary key, 
     sourceID INT NOT NULL, 
     interval_start DATE NOT NULL, 
     interval_end DATE NOT NULL 
    ); 

    OPEN theCursor; 
    read_loop: LOOP 
     FETCH theCursor INTO l_ID,l_startdate,l_enddate; 
     IF done THEN 
      LEAVE read_loop; 
     END IF; 
     set thisDate = l_startdate; 

     repeat 
      select 
      case unitval 
       when 'MICROSECOND' then timestampadd(MICROSECOND, intval, thisDate) 
       when 'SECOND'  then timestampadd(SECOND, intval, thisDate) 
       when 'MINUTE'  then timestampadd(MINUTE, intval, thisDate) 
       when 'HOUR'  then timestampadd(HOUR, intval, thisDate) 
       when 'DAY'   then timestampadd(DAY, intval, thisDate) 
       when 'WEEK'  then timestampadd(WEEK, intval, thisDate) 
       when 'MONTH'  then timestampadd(MONTH, intval, thisDate) 
       when 'QUARTER'  then timestampadd(QUARTER, intval, thisDate) 
       when 'YEAR'  then timestampadd(YEAR, intval, thisDate) 
      end into nextDate; 

      insert into year_intervals2 (sourceID,interval_start,interval_end) select l_ID,thisDate, date_add(nextDate,INTERVAL -1 DAY); 
      set thisDate = nextDate; 
     until thisDate >= l_enddate 
     end repeat; 
    END LOOP; 

    select * from year_intervals2; 
END @@ 
DELIMITER ; 

試験：

call make_intervals_v2('YEAR',1); 
select * from year_intervals2; 
+----+----------+----------------+--------------+ 
| id | sourceID | interval_start | interval_end | 
+----+----------+----------------+--------------+ 
| 1 |  1 | 2016-01-01  | 2016-12-31 | 
| 2 |  1 | 2017-01-01  | 2017-12-31 | 
| 3 |  1 | 2018-01-01  | 2018-12-31 | 
| 4 |  1 | 2019-01-01  | 2019-12-31 | 
| 5 |  1 | 2020-01-01  | 2020-12-31 | 
| 6 |  2 | 2017-01-01  | 2017-12-31 | 
| 7 |  2 | 2018-01-01  | 2018-12-31 | 
| 8 |  2 | 2019-01-01  | 2019-12-31 | 
| 9 |  2 | 2020-01-01  | 2020-12-31 | 
| 10 |  3 | 2018-01-01  | 2018-12-31 | 
| 11 |  3 | 2019-01-01  | 2019-12-31 | 
| 12 |  3 | 2020-01-01  | 2020-12-31 | 
| 13 |  4 | 2019-01-01  | 2019-12-31 | 
| 14 |  4 | 2020-01-01  | 2020-12-31 | 
| 15 |  5 | 2020-01-01  | 2020-12-31 | 
+----+----------+----------------+--------------+ 

テスト他、

call make_intervals_v2('WEEK',2); 

上記ループ（カーソルとデュアルループ繰り返し/時まで）はそれほど恒星行いません。私はそれを再修正することができました。これはあなたができることの一例です。