廢話不多說。自己看看吧.等以后有時間了再完善完善.^-^
- CREATE TABLE `vardata` (
- `Id` int(11) NOT NULL AUTO_INCREMENT,
- `name` varchar(255) DEFAULT NULL,
- `time` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
- `data` double(15,5) DEFAULT '-601.00000',
- PRIMARY KEY (`Id`,`time`),
- UNIQUE KEY `unique` (`name`,`time`)
- )
-
- CREATE TABLE `vardata_compute` (
- `Id` int(11) NOT NULL AUTO_INCREMENT,
- `name` varchar(255) DEFAULT NULL,
- `time` datetime DEFAULT NULL,
- `data` double(15,5) DEFAULT NULL,
- PRIMARY KEY (`Id`)
- )
CREATE TABLE `vardata` (`Id` int(11) NOT NULL AUTO_INCREMENT,`name` varchar(255) DEFAULT NULL,`time` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',`data` double(15,5) DEFAULT '-601.00000',PRIMARY KEY (`Id`,`time`),UNIQUE KEY `unique` (`name`,`time`))CREATE TABLE `vardata_compute` (`Id` int(11) NOT NULL AUTO_INCREMENT,`name` varchar(255) DEFAULT NULL,`time` datetime DEFAULT NULL,`data` double(15,5) DEFAULT NULL,PRIMARY KEY (`Id`))
- DROP TRIGGER IF EXISTS trigger_insert_59data;
- CREATE TRIGGER trigger_insert_59data
- AFTER INSERT
- ON vardata
- FOR EACH ROW
- BEGIN
- DECLARE time_59 DateTime;
- SET time_59 = NEW.time-INTERVAL 1 SECOND;
- IF MINUTE(NEW.time)=0 AND SECOND(NEW.time)=0 THEN
- INSERT INTO vardata_compute SET name=NEW.name,time=time_59,data=NEW.data;
- END IF;
- END;
-
- DROP TRIGGER IF EXISTS trigger_delete_59data;
- CREATE TRIGGER trigger_delete_59data
- AFTER DELETE
- ON vardata
- FOR EACH ROW
- BEGIN
- DECLARE time_59 DateTime;
- SET time_59 = OLD.time-INTERVAL 1 SECOND;
- IF MINUTE(OLD.time)=0 AND SECOND(OLD.time)=0 THEN
- DELETE FROM vardata_compute WHERE time=time_59 AND name=old.name;
- END IF;
- END;
-
- DROP TRIGGER IF EXISTS trigger_update_59data;
- CREATE TRIGGER trigger_update_59data
- AFTER UPDATE
- ON vardata
- FOR EACH ROW
- BEGIN
- DECLARE time_59 DateTime;
- SET time_59 = NEW.time-INTERVAL 1 SECOND;
- IF MINUTE(NEW.time)=0 AND SECOND(NEW.time)=0 THEN
- UPDATE vardata_compute SET data=NEW.data WHERE time=time_59 AND name=NEW.name;
- END IF;
- END;