相同的MySQL查詢在同一服務器上返回不同的結果

我正在運行以下查詢。按照預期，有時它返回大約100條記錄，其他時間對於連接字段的所有值只返回一條記錄爲NULL的記錄。另外，解釋幾乎每次都會返回不同的結果。相同的MySQL查詢在同一服務器上返回不同的結果

下面是該查詢：

EXPLAIN 
SELECT 
`fieldreps`.`user_id` AS `fieldreps.user_id`, 
`fieldreps`.`availability_id` AS `fieldreps.availability_id`, 
`fieldreps`.`applicant_type` AS `fieldreps.applicant_type`, 
`fieldreps`.`license_number` AS `fieldreps.license_number`, 
`fieldreps`.`license_exp` AS `fieldreps.license_exp`, 
`fieldreps`.`license_state` AS `fieldreps.license_state`, 
`fieldreps`.`car` AS `fieldreps.car`, 
`fieldreps`.`authorized_worker` AS `fieldreps.authorized_worker`, 
`fieldreps`.`restrictions` AS `fieldreps.restrictions`, 
`fieldreps`.`night` AS `fieldreps.night`, 
`fieldreps`.`day` AS `fieldreps.day`, 
`fieldreps`.`longer` AS `fieldreps.longer`, 
`fieldreps`.`commitment` AS `fieldreps.commitment`, 
`fieldreps`.`travel_metro` AS `fieldreps.travel_metro`, 
`fieldreps`.`travel_states` AS `fieldreps.travel_states`, 
`fieldreps`.`big_employee` AS `fieldreps.big_employee`, 
`fieldreps`.`employed` AS `fieldreps.employed`, 
`fieldreps`.`retail` AS `fieldreps.retail`, 
`fieldreps`.`status` AS `fieldreps.status`, 
`fieldreps`.`start` AS `fieldreps.start`, 
`fieldreps`.`sales` AS `fieldreps.sales`, 
`fieldreps`.`study` AS `fieldreps.study`, 
`fieldreps`.`relevant` AS `fieldreps.relevant`, 
`fieldreps`.`experience` AS `fieldreps.experience`, 
`fieldreps`.`claims` AS `fieldreps.claims`, 
`fieldreps`.`education` AS `fieldreps.education`, 
`fieldreps`.`degree_details` AS `fieldreps.degree_details`, 
`fieldreps`.`degree_institution` AS `fieldreps.degree_institution`, 
`fieldreps`.`other_training` AS `fieldreps.other_training`, 
`fieldreps`.`jobs` AS `fieldreps.jobs`, 
`fieldreps`.`current_training` AS `fieldreps.current_training`, 
`fieldreps`.`interested` AS `fieldreps.interested`, 
`fieldreps`.`achievements` AS `fieldreps.achievements`, 
`fieldreps`.`passions` AS `fieldreps.passions`, 
`fieldreps`.`ambitions` AS `fieldreps.ambitions`, 
`fieldreps`.`max_travel_time` AS `fieldreps.max_travel_time`, 
`fieldreps`.`creation_time` AS `fieldreps.creation_time`, 
`fieldreps`.`resume` AS `fieldreps.resume`, 
`users`.`user_id` AS `users.user_id`, 
`users`.`email` AS `users.email`, 
`users`.`name` AS `users.name`, 
`users`.`password` AS `users.password`, 
`users`.`given_name` AS `users.given_name`, 
`users`.`title` AS `users.title`, 
`users`.`nationality` AS `users.nationality`, 
`tasks`.`task_id` AS `tasks.task_id`, 
`tasks`.`recurrence_id` AS `tasks.recurrence_id`, 
`tasks`.`parent_id` AS `tasks.parent_id`, 
`tasks`.`user_id` AS `tasks.user_id`, 
`tasks`.`campaign_id` AS `tasks.campaign_id`, 
`tasks`.`location_id` AS `tasks.location_id`, 
`tasks`.`title` AS `tasks.title`, 
`tasks`.`description` AS `tasks.description`, 
`tasks`.`earliest_start` AS `tasks.earliest_start`, 
`tasks`.`deadline` AS `tasks.deadline`, 
`tasks`.`km_estimate` AS `tasks.km_estimate`, 
`tasks`.`estimate` AS `tasks.estimate`, 
`datapoints`.`datapoint_id` AS `datapoints.datapoint_id`, 
`datapoints`.`task_id` AS `datapoints.task_id`, 
`datapoints`.`datatype_id` AS `datapoints.datatype_id`, 
`datapoints`.`value` AS `datapoints.value`, 
`datapoints`.`product_id` AS `datapoints.product_id`, 
`datapoints`.`recorded` AS `datapoints.recorded`, 
`datatypes`.`datatype_id` AS `datatypes.datatype_id`, 
`datatypes`.`datatype_template_id` AS `datatypes.datatype_template_id`, 
`datatypes`.`client_id` AS `datatypes.client_id`, 
`datatypes`.`name` AS `datatypes.name`, 
`datatypes`.`description` AS `datatypes.description`, 
`datatypes`.`options` AS `datatypes.options`, 
`locations`.`location_id` AS `locations.location_id`, 
`locations`.`retailer_group_id` AS `locations.retailer_group_id`, 
`locations`.`latitude` AS `locations.latitude`, 
`locations`.`longitude` AS `locations.longitude`, 
`locations`.`name` AS `locations.name`, 
`locations`.`address` AS `locations.address`, 
`locations`.`city` AS `locations.city`, 
`locations`.`state` AS `locations.state`, 
`locations`.`postal` AS `locations.postal`, 
`locations`.`phone` AS `locations.phone`, 
`locations`.`suburb` AS `locations.suburb`, 
`locations`.`country` AS `locations.country`, 
`locations`.`region` AS `locations.region`, 
`locations`.`coverage` AS `locations.coverage`, 
`locations`.`store_number` AS `locations.store_number`, 
`locations`.`store_type` AS `locations.store_type` 

FROM `fieldreps` AS `fieldreps` 

LEFT JOIN `users` ON (`fieldreps`.`user_id` = `users`.`user_id`) 
LEFT JOIN `tasks` ON (`fieldreps`.`user_id` = `tasks`.`user_id`) 
LEFT JOIN `datapoints` ON (`tasks`.`task_id` = `datapoints`.`task_id`) 
LEFT JOIN `datatypes` ON (`datapoints`.`datatype_id` = `datatypes`.`datatype_id`) 
LEFT JOIN `locations` ON (`tasks`.`location_id` = `locations`.`location_id`) 

WHERE `fieldreps`.`user_id` LIKE '5f5dc29c-832e-5646-9dc2-46d774bfb1ec'

One Result Second Result

No worky worked

我運行在phpMyAdmin查詢。數據庫託管在xeround.com上（可能是它們配置中的錯誤？）

我很難過。我不確定該從哪裏出發。

在此先感謝！

UPDATE：

下面是從phpMyAdmin的轉儲：

-- phpMyAdmin SQL Dump 
-- version 3.4.3.2 
-- http://www.phpmyadmin.net 
-- 
-- Generation Time: Jan 07, 2012 at 08:20 PM 
-- Server version: 5.1.42 
-- PHP Version: 5.3.1 

SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO"; 
SET time_zone = "+00:00"; 


/*!40101 SET @[email protected]@CHARACTER_SET_CLIENT */; 
/*!40101 SET @[email protected]@CHARACTER_SET_RESULTS */; 
/*!40101 SET @[email protected]@COLLATION_CONNECTION */; 
/*!40101 SET NAMES utf8 */; 

-- 
-- Database: `big_development` 
-- 

-- -------------------------------------------------------- 

-- 
-- Table structure for table `datapoints` 
-- 

CREATE TABLE IF NOT EXISTS `datapoints` (
    `datapoint_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `task_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `datatype_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `value` text COLLATE utf8_bin, 
    `product_id` varchar(36) COLLATE utf8_bin DEFAULT NULL, 
    `recorded` text COLLATE utf8_bin, 
    PRIMARY KEY (`datapoint_id`), 
    KEY `task_id` (`task_id`), 
    KEY `datatype_id` (`datatype_id`), 
    KEY `product_id` (`product_id`) 
) ENGINE=Xeround DEFAULT CHARSET=utf8 COLLATE=utf8_bin; 

-- -------------------------------------------------------- 

-- 
-- Table structure for table `datatypes` 
-- 

CREATE TABLE IF NOT EXISTS `datatypes` (
    `datatype_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `datatype_template_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `client_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `name` text COLLATE utf8_bin, 
    `description` text COLLATE utf8_bin, 
    `options` text COLLATE utf8_bin, 
    PRIMARY KEY (`datatype_id`), 
    KEY `datatype_template_id` (`datatype_template_id`), 
    KEY `client_id` (`client_id`) 
) ENGINE=Xeround DEFAULT CHARSET=utf8 COLLATE=utf8_bin; 

-- -------------------------------------------------------- 

-- 
-- Table structure for table `fieldreps` 
-- 

CREATE TABLE IF NOT EXISTS `fieldreps` (
    `user_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `availability_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `applicant_type` text COLLATE utf8_bin NOT NULL, 
    `license_number` text COLLATE utf8_bin NOT NULL, 
    `license_exp` text COLLATE utf8_bin, 
    `license_state` text COLLATE utf8_bin, 
    `car` text COLLATE utf8_bin NOT NULL, 
    `authorized_worker` text COLLATE utf8_bin NOT NULL, 
    `restrictions` text COLLATE utf8_bin NOT NULL, 
    `night` text COLLATE utf8_bin NOT NULL, 
    `day` text COLLATE utf8_bin NOT NULL, 
    `longer` text COLLATE utf8_bin NOT NULL, 
    `commitment` text COLLATE utf8_bin NOT NULL, 
    `travel_metro` text COLLATE utf8_bin NOT NULL, 
    `travel_states` text COLLATE utf8_bin NOT NULL, 
    `big_employee` text COLLATE utf8_bin NOT NULL, 
    `employed` text COLLATE utf8_bin NOT NULL, 
    `retail` text COLLATE utf8_bin NOT NULL, 
    `status` text COLLATE utf8_bin NOT NULL, 
    `start` text COLLATE utf8_bin, 
    `sales` text COLLATE utf8_bin NOT NULL, 
    `study` text COLLATE utf8_bin NOT NULL, 
    `relevant` text COLLATE utf8_bin NOT NULL, 
    `experience` text COLLATE utf8_bin NOT NULL, 
    `claims` text COLLATE utf8_bin NOT NULL, 
    `education` text COLLATE utf8_bin NOT NULL, 
    `degree_details` text COLLATE utf8_bin NOT NULL, 
    `degree_institution` text COLLATE utf8_bin NOT NULL, 
    `other_training` text COLLATE utf8_bin NOT NULL, 
    `jobs` text COLLATE utf8_bin NOT NULL, 
     `current_training` text COLLATE utf8_bin NOT NULL, 
    `interested` text COLLATE utf8_bin NOT NULL, 
    `achievements` text COLLATE utf8_bin NOT NULL, 
    `passions` text COLLATE utf8_bin NOT NULL, 
    `ambitions` text COLLATE utf8_bin NOT NULL, 
    `max_travel_time` text COLLATE utf8_bin NOT NULL, 
    `creation_time` text COLLATE utf8_bin, 
    `resume` text COLLATE utf8_bin NOT NULL, 
    PRIMARY KEY (`user_id`), 
    KEY `availability_id` (`availability_id`) 
) ENGINE=Xeround DEFAULT CHARSET=utf8 COLLATE=utf8_bin; 

-- -------------------------------------------------------- 

-- 
-- Table structure for table `locations` 
-- 

CREATE TABLE IF NOT EXISTS `locations` (
    `location_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `retailer_group_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `latitude` text COLLATE utf8_bin, 
    `longitude` text COLLATE utf8_bin, 
    `name` text COLLATE utf8_bin, 
    `address` text COLLATE utf8_bin, 
    `city` text COLLATE utf8_bin, 
    `state` text COLLATE utf8_bin, 
    `postal` text COLLATE utf8_bin, 
    `phone` text COLLATE utf8_bin, 
    `suburb` text COLLATE utf8_bin, 
    `country` text COLLATE utf8_bin, 
    `region` text COLLATE utf8_bin, 
    `coverage` tinyint(1) DEFAULT NULL, 
    `store_number` text COLLATE utf8_bin, 
    `store_type` text COLLATE utf8_bin, 
    PRIMARY KEY (`location_id`), 
    KEY `retailer_group_id` (`retailer_group_id`) 
) ENGINE=Xeround DEFAULT CHARSET=utf8 COLLATE=utf8_bin; 

-- -------------------------------------------------------- 

-- 
-- Table structure for table `tasks` 
-- 

CREATE TABLE IF NOT EXISTS `tasks` (
    `task_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `recurrence_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `parent_id` varchar(36) COLLATE utf8_bin DEFAULT NULL, 
    `user_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `campaign_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `location_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `title` text COLLATE utf8_bin, 
    `description` text COLLATE utf8_bin, 
    `earliest_start` text COLLATE utf8_bin, 
    `deadline` text COLLATE utf8_bin, 
    `km_estimate` text COLLATE utf8_bin, 
    `estimate` int(11) DEFAULT NULL, 
    PRIMARY KEY (`task_id`), 
    KEY `campaign_id` (`campaign_id`), 
    KEY `location_id` (`location_id`), 
    KEY `user_id` (`user_id`), 
    KEY `parent_id` (`parent_id`), 
    KEY `recurrence_id` (`recurrence_id`) 
) ENGINE=Xeround DEFAULT CHARSET=utf8 COLLATE=utf8_bin; 

-- -------------------------------------------------------- 

-- 
-- Table structure for table `users` 
-- 

CREATE TABLE IF NOT EXISTS `users` (
    `user_id` varchar(36) COLLATE utf8_bin NOT NULL, 
    `email` varchar(255) COLLATE utf8_bin NOT NULL, 
    `name` text COLLATE utf8_bin, 
    `password` varchar(255) COLLATE utf8_bin NOT NULL, 
    `given_name` text COLLATE utf8_bin, 
    `title` text COLLATE utf8_bin NOT NULL, 
    `nationality` text COLLATE utf8_bin, 
    PRIMARY KEY (`user_id`), 
    KEY `user_id` (`user_id`) 
) ENGINE=Xeround DEFAULT CHARSET=utf8 COLLATE=utf8_bin; 

/*!40101 SET [email protected]_CHARACTER_SET_CLIENT */; 
/*!40101 SET [email protected]_CHARACTER_SET_RESULTS */; 
/*!40101 SET [email protected]_COLLATION_CONNECTION */;

編輯：

如果我刪除所有的表，但用戶的加入，查詢的工作每次。但是，只要我在任務上添加聯接，就會中斷。例如，這個查詢打破它以同樣的方式爲我張貼的第一個查詢：

SELECT 
`fieldreps`.`user_id` AS `fieldreps.user_id`, 
`fieldreps`.`availability_id` AS `fieldreps.availability_id`, 
`fieldreps`.`applicant_type` AS `fieldreps.applicant_type`, 
`fieldreps`.`license_number` AS `fieldreps.license_number`, 
`fieldreps`.`license_exp` AS `fieldreps.license_exp`, 
`fieldreps`.`license_state` AS `fieldreps.license_state`, 
`fieldreps`.`car` AS `fieldreps.car`, 
`fieldreps`.`authorized_worker` AS `fieldreps.authorized_worker`, 
`fieldreps`.`restrictions` AS `fieldreps.restrictions`, 
`fieldreps`.`night` AS `fieldreps.night`, 
`fieldreps`.`day` AS `fieldreps.day`, 
`fieldreps`.`longer` AS `fieldreps.longer`, 
`fieldreps`.`commitment` AS `fieldreps.commitment`, 
`fieldreps`.`travel_metro` AS `fieldreps.travel_metro`, 
`fieldreps`.`travel_states` AS `fieldreps.travel_states`, 
`fieldreps`.`big_employee` AS `fieldreps.big_employee`, 
`fieldreps`.`employed` AS `fieldreps.employed`, 
`fieldreps`.`retail` AS `fieldreps.retail`, 
`fieldreps`.`status` AS `fieldreps.status`, 
`fieldreps`.`start` AS `fieldreps.start`, 
`fieldreps`.`sales` AS `fieldreps.sales`, 
`fieldreps`.`study` AS `fieldreps.study`, 
`fieldreps`.`relevant` AS `fieldreps.relevant`, 
`fieldreps`.`experience` AS `fieldreps.experience`, 
`fieldreps`.`claims` AS `fieldreps.claims`, 
`fieldreps`.`education` AS `fieldreps.education`, 
`fieldreps`.`degree_details` AS `fieldreps.degree_details`, 
`fieldreps`.`degree_institution` AS `fieldreps.degree_institution`, 
`fieldreps`.`other_training` AS `fieldreps.other_training`, 
`fieldreps`.`jobs` AS `fieldreps.jobs`, 
`fieldreps`.`current_training` AS `fieldreps.current_training`, 
`fieldreps`.`interested` AS `fieldreps.interested`, 
`fieldreps`.`achievements` AS `fieldreps.achievements`, 
`fieldreps`.`passions` AS `fieldreps.passions`, 
`fieldreps`.`ambitions` AS `fieldreps.ambitions`, 
`fieldreps`.`max_travel_time` AS `fieldreps.max_travel_time`, 
`fieldreps`.`creation_time` AS `fieldreps.creation_time`, 
`fieldreps`.`resume` AS `fieldreps.resume`, 
`users`.`user_id` AS `users.user_id`, 
    `users`.`email` AS `users.email`, 
`users`.`name` AS `users.name`, 
`users`.`password` AS `users.password`, 
`users`.`given_name` AS `users.given_name`, 
`users`.`title` AS `users.title`, 
`users`.`nationality` AS `users.nationality`, 
`tasks`.`task_id` AS `tasks.task_id`, 
`tasks`.`recurrence_id` AS `tasks.recurrence_id`, 
`tasks`.`parent_id` AS `tasks.parent_id`, 
`tasks`.`user_id` AS `tasks.user_id`, 
`tasks`.`campaign_id` AS `tasks.campaign_id`, 
`tasks`.`location_id` AS `tasks.location_id`, 
`tasks`.`title` AS `tasks.title`, 
`tasks`.`description` AS `tasks.description`, 
`tasks`.`earliest_start` AS `tasks.earliest_start`, 
`tasks`.`deadline` AS `tasks.deadline`, 
`tasks`.`km_estimate` AS `tasks.km_estimate`, 
`tasks`.`estimate` AS `tasks.estimate` 

FROM `fieldreps` AS `fieldreps` 

LEFT JOIN `users` ON (`fieldreps`.`user_id` = `users`.`user_id`) 
LEFT JOIN `tasks` ON (`fieldreps`.`user_id` = `tasks`.`user_id`) 

WHERE `fieldreps`.`user_id` LIKE '5f5dc29c-832e-5646-9dc2-46d774bfb1ec'

來源

2012-01-07 Jonathan

你有在所有這些表中的主鍵？ – redmoon7777 2012-01-07 20:06:49

@ redmoon7777是的，我願意。將SQL添加到問題中，以便您可以看到。 – Jonathan 2012-01-07 20:21:25

您是否嘗試添加ORDER BY子句來查看會發生什麼？ – redmoon7777 2012-01-07 21:02:28

連接和數據庫排序規則不同。

來源

2012-01-23 01:41:11 Jonathan

相同的MySQL查詢在同一服務器上返回不同的結果

回答

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