使用Stored Procedure取得SQLyog的版本

透過SQLyog寫一個Stored Procedure(預存程序)，來取得SQLyog版本資訊

DELIMITER //
CREATE
    PROCEDURE `stock`.`GetDBVersion`(OUT VERSION VARCHAR(60),OUT DAY VARCHAR(60))
    LANGUAGE SQL NOT DETERMINISTIC
    CONTAINS SQL SQL SECURITY DEFINER
    BEGIN
        SELECT VERSION() INTO VERSION;
        SELECT CURDATE() INTO DAY;
    END//
DELIMITER ;

取得SQLyog版本資訊前先初始化GetDBVersion預存程序

CALL GetDBVersion(@version,@day);

再下SQL指令取得版本

SELECT @version,@day;

執行結果

使用Stored Procedure列出交易日

透過SQLyog寫一個Stored Procedure(預存程序)，來產生一個連續日期的序列

DELIMITER $$
CREATE
    PROCEDURE `stock`.`gen_time_sequence`(startstamp TIMESTAMP, endstamp TIMESTAMP, intval INTEGER, unitval VARCHAR(10))
    BEGIN
 DECLARE thisStamp TIMESTAMP;
 DECLARE nextStamp TIMESTAMP;
 SET thisStamp = startstamp;

 -- Drop and Create the temp table

 DROP TEMPORARY TABLE IF EXISTS timestamp_sequence;

 CREATE TEMPORARY TABLE IF NOT EXISTS timestamp_sequence(
 id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,    
 TIME TIMESTAMP
 );    
  
 -- 迴圈, 每次增加間隔
 REPEAT 
  SELECT CASE unitval
   WHEN 'MICROSECOND' THEN TIMESTAMPADD(MICROSECOND, intval, thisStamp)
   WHEN 'SECOND'      THEN TIMESTAMPADD(SECOND, intval, thisStamp)
   WHEN 'MINUTE'      THEN TIMESTAMPADD(MINUTE, intval, thisStamp)
   WHEN 'HOUR'        THEN TIMESTAMPADD(HOUR, intval, thisStamp)
   WHEN 'DAY'         THEN TIMESTAMPADD(DAY, intval, thisStamp)
   WHEN 'WEEK'        THEN TIMESTAMPADD(WEEK, intval, thisStamp)
   WHEN 'MONTH'       THEN TIMESTAMPADD(MONTH, intval, thisStamp)
   WHEN 'QUARTER'     THEN TIMESTAMPADD(QUARTER, intval, thisStamp)
   WHEN 'YEAR'        THEN TIMESTAMPADD(YEAR, intval, thisStamp)
   END INTO nextStamp;
  -- 過濾週六,週日與特殊日子
  IF DAYOFWEEK(thisStamp) <> 1 AND DAYOFWEEK(thisStamp) <> 7 OR DATE(thisStamp) = STR_TO_DATE('2012-08-02', '%Y-%m-%d') THEN
   INSERT INTO timestamp_sequence(Dateid, Weekdayid) SELECT DATE(thisStamp), DAYOFWEEK(thisStamp);
  ELSEIF DATE(thisStamp) = STR_TO_DATE('2012-03-03', '%Y-%m-%d') THEN
   INSERT INTO timestamp_sequence(Dateid, Weekdayid) SELECT DATE(thisStamp), DAYOFWEEK(thisStamp);
  END IF;
  SET thisStamp = nextStamp;
 UNTIL thisStamp >= endstamp
 END REPEAT;
    END$$
DELIMITER ;

要產生時間序列前先初始化gen_time_sequence預存程序

CALL gen_time_sequence('2012-01-01','2012-12-31', 1, 'DAY');  

取得時間序列產生的天數，執行以下SQL指令

SELECT COUNT(1) FROM timestamp_sequence;

執行結果

取得時間序列中的前10筆資料

select * from timestamp_sequence limit 10;

執行結果