แบบสอบถามด้านล่างใช้เวลาในการดำเนินการมากกว่า 11 นาที
SELECT `c`.*,
`e`.`name` AS `employee_name`,
`e`.`emp_no`,
`d`.`code` AS `department_code`,
IF(ew.code IS NOT NULL, ew.code, egw.code) AS shift_code,
IF(ew.code IS NOT NULL, ew.time_in_from, egw.time_in_from) AS time_in_from,
IF(ew.code IS NOT NULL, ew.time_out_to, egw.time_out_to) AS time_out_to,
IF(ew.code IS NOT NULL, ew.next_day, egw.next_day) AS next_day
FROM `tms_emp_badge_card` AS `c`
LEFT JOIN `tms_door_record_raw` AS `dr`
ON `c`.`card_no` = `dr`.`card_no`
LEFT JOIN `tms_employee` AS `e`
ON `c`.`emp_no` = `e`.`emp_no`
LEFT JOIN `tms_emp_group` AS `g`
ON `e`.`group_id` = `g`.`id`
LEFT JOIN `tms_emp_department` AS `d`
ON `e`.`department_id` = `d`.`id`
LEFT JOIN `tms_emp_workschedule` AS `ewt`
ON `ewt`.`workschedule_date` = "2016-11-01"
AND ( ewt.reference_no = c.emp_no
AND ewt.reference_type = "emp_no" )
LEFT JOIN `tms_workschedule` AS `ew`
ON `ewt`.`workschedule_id` = `ew`.`id`
LEFT JOIN `tms_emp_workschedule` AS `egwt`
ON `egwt`.`workschedule_date` = "2016-11-01"
AND ( egwt.reference_no = g.code
AND egwt.reference_type = "group_code" )
LEFT JOIN `tms_workschedule` AS `egw`
ON `egwt`.`workschedule_id` = `egw`.`id`
WHERE `dr`.`record_time` BETWEEN '2016-11-01' AND '2016-11-02'
GROUP BY `c`.`card_no`
ORDER BY c.emp_no
ด้านล่างนี้เป็นแบบสอบถามอธิบาย
+----+-------------+-------+------------+--------+-------------------------------------------------------------------------+-----------------------------------------+---------+--------------------------+------+----------+---------------------------------+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+-------------+-------+------------+--------+-------------------------------------------------------------------------+-----------------------------------------+---------+--------------------------+------+----------+---------------------------------+
| 1 | SIMPLE | c | NULL | ALL | tms_emp_badge_card_card_no_index,emp_card_no | NULL | NULL | NULL | 884 | 100.00 | Using temporary; Using filesort |
| 1 | SIMPLE | e | NULL | eq_ref | tms_employee_emp_no_unique | tms_employee_emp_no_unique | 767 | tms.c.emp_no | 1 | 100.00 | NULL |
| 1 | SIMPLE | g | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.e.group_id | 1 | 100.00 | NULL |
| 1 | SIMPLE | d | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.e.department_id | 1 | 100.00 | NULL |
| 1 | SIMPLE | dr | NULL | ref | tms_door_record_raw_card_no_index,tms_door_record_raw_record_time_index | tms_door_record_raw_card_no_index | 767 | tms.c.card_no | 276 | 1.27 | Using where |
| 1 | SIMPLE | ewt | NULL | ref | tms_emp_workschedule_reference_no_index,workschedule_date | tms_emp_workschedule_reference_no_index | 767 | tms.c.emp_no | 83 | 100.00 | Using where |
| 1 | SIMPLE | ew | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.ewt.workschedule_id | 1 | 100.00 | NULL |
| 1 | SIMPLE | egwt | NULL | ref | tms_emp_workschedule_reference_no_index,workschedule_date | tms_emp_workschedule_reference_no_index | 767 | tms.g.code | 83 | 100.00 | Using where |
| 1 | SIMPLE | egw | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.egwt.workschedule_id | 1 | 100.00 | NULL |
+----+-------------+-------+------------+--------+-------------------------------------------------------------------------+-----------------------------------------+---------+--------------------------+------+----------+---------------------------------+
โครงสร้างตาราง
CREATE TABLE `tms_emp_badge_card` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`import_id` int(11) DEFAULT NULL,
`emp_no` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`card_no` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`created_at` timestamp NULL DEFAULT NULL,
`updated_at` timestamp NULL DEFAULT NULL,
`deleted_at` timestamp NULL DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `tms_emp_badge_card_import_id_unique` (`import_id`),
KEY `tms_emp_badge_card_emp_no_index` (`emp_no`),
KEY `tms_emp_badge_card_card_no_index` (`card_no`),
KEY `emp_card_no` (`card_no`,`emp_no`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=885 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
CREATE TABLE `tms_door_record_raw` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`import_id` int(11) DEFAULT NULL,
`card_no` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`door_no` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`controller_no` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`record_time` datetime NOT NULL,
`record_state` int(11) NOT NULL,
`open_type` int(11) NOT NULL,
`pass_flag` int(11) NOT NULL,
`hand_value` int(11) NOT NULL,
`lfeet_value` int(11) NOT NULL,
`rfeet_value` int(11) NOT NULL,
`created_at` timestamp NULL DEFAULT NULL,
`updated_at` timestamp NULL DEFAULT NULL,
`deleted_at` timestamp NULL DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `tms_door_record_raw_import_id_unique` (`import_id`),
KEY `tms_door_record_raw_card_no_index` (`card_no`),
KEY `tms_door_record_raw_door_no_index` (`door_no`),
KEY `tms_door_record_raw_controller_no_index` (`controller_no`),
KEY `tms_door_record_raw_record_time_index` (`record_time`)
) ENGINE=InnoDB AUTO_INCREMENT=368713 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
CREATE TABLE `tms_employee` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`import_id` int(11) DEFAULT NULL,
`emp_no` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`name` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
`email` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
`plant_id` int(10) unsigned DEFAULT NULL,
`department_id` int(10) unsigned DEFAULT NULL,
`group_id` int(10) unsigned DEFAULT NULL,
`attendance_group_id` int(11) NOT NULL,
`created_at` timestamp NULL DEFAULT NULL,
`updated_at` timestamp NULL DEFAULT NULL,
`deleted_at` timestamp NULL DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `tms_employee_emp_no_unique` (`emp_no`),
UNIQUE KEY `tms_employee_import_id_unique` (`import_id`),
KEY `tms_employee_plant_id_foreign` (`plant_id`),
KEY `tms_employee_department_id_foreign` (`department_id`),
KEY `tms_employee_group_id_foreign` (`group_id`),
CONSTRAINT `tms_employee_department_id_foreign` FOREIGN KEY (`department_id`) REFERENCES `tms_emp_department` (`id`) ON DELETE CASCADE,
CONSTRAINT `tms_employee_group_id_foreign` FOREIGN KEY (`group_id`) REFERENCES `tms_emp_group` (`id`) ON DELETE CASCADE,
CONSTRAINT `tms_employee_plant_id_foreign` FOREIGN KEY (`plant_id`) REFERENCES `tms_emp_plant` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=865 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
p_no`,
`d (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`import_id` int(11) DEFAULT NULL,
`code` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`description` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`created_at` timestamp NULL DEFAULT NULL,
`updated_at` timestamp NULL DEFAULT NULL,
`deleted_at` timestamp NULL DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `tms_emp_group_import_id_unique` (`import_id`),
KEY `tms_emp_group_code_index` (`code`)
) ENGINE=InnoDB AUTO_INCREMENT=48 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
CREATE TABLE `tms_emp_department` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`import_id` int(11) DEFAULT NULL,
`code` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`description` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`created_at` timestamp NULL DEFAULT NULL,
`updated_at` timestamp NULL DEFAULT NULL,
`deleted_at` timestamp NULL DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `tms_emp_department_import_id_unique` (`import_id`),
KEY `tms_emp_department_code_index` (`code`)
) ENGINE=InnoDB AUTO_INCREMENT=82 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
CREATE TABLE `tms_emp_workschedule` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`import_id` int(11) DEFAULT NULL,
`reference_type` enum('emp_no','plant_code','department_code','group_code') COLLATE utf8_unicode_ci NOT NULL,
`reference_no` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`workschedule_id` int(10) unsigned NOT NULL,
`workschedule_date` date NOT NULL,
`created_at` timestamp NULL DEFAULT NULL,
`updated_at` timestamp NULL DEFAULT NULL,
`deleted_at` timestamp NULL DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `tms_emp_workschedule_import_id_unique` (`import_id`),
KEY `tms_emp_workschedule_reference_no_index` (`reference_no`),
KEY `tms_emp_workschedule_workschedule_id_foreign` (`workschedule_id`),
KEY `workschedule_date` (`workschedule_date`),
CONSTRAINT `tms_emp_workschedule_workschedule_id_foreign` FOREIGN KEY (`workschedule_id`) REFERENCES `tms_workschedule` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=27597 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
CREATE TABLE `tms_workschedule` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`import_id` int(11) DEFAULT NULL,
`code` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`description` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`time_in` time NOT NULL,
`time_in_from` time NOT NULL,
`time_in_to` time NOT NULL,
`time_out` time NOT NULL,
`time_out_from` time NOT NULL,
`time_out_to` time NOT NULL,
`next_day` tinyint(1) NOT NULL,
`created_at` timestamp NULL DEFAULT NULL,
`updated_at` timestamp NULL DEFAULT NULL,
`deleted_at` timestamp NULL DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `tms_workschedule_import_id_unique` (`import_id`),
KEY `tms_workschedule_code_index` (`code`)
) ENGINE=InnoDB AUTO_INCREMENT=45 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
ฉันคิดว่า "การใช้ชั่วคราวการใช้ปัญหา fileort" หรือฉันควรสร้างดัชนีหลายคอลัมน์ แต่ฉันไม่ทราบวิธีการแก้ไข กรุณาแนะนำ
อัปเดต 1:
หลังจากเพิ่มดัชนีหลายคอลัมน์ในตาราง tms_door_record_raw (KEY card_no_record_time( card_no, record_time)) การประมวลผล sql ลดลงจาก 11 นาทีเป็น 3.2 วินาที
ดำเนินการอธิบาย sql อีกครั้ง คีย์ตารางการเข้าร่วมสำหรับdrเปลี่ยนจาก (card_no) เป็น (card_no, record_time) ในคอลัมน์พิเศษที่แสดงอยู่Using where; Using index
+----+-------------+-------+------------+--------+---------------------------------------------------------------------------------------------+-----------------------------------------+---------+--------------------------+------+----------+---------------------------------+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+-------------+-------+------------+--------+---------------------------------------------------------------------------------------------+-----------------------------------------+---------+--------------------------+------+----------+---------------------------------+
| 1 | SIMPLE | c | NULL | ALL | tms_emp_badge_card_card_no_index,emp_card_no | NULL | NULL | NULL | 884 | 100.00 | Using temporary; Using filesort |
| 1 | SIMPLE | e | NULL | eq_ref | tms_employee_emp_no_unique | tms_employee_emp_no_unique | 767 | tms.c.emp_no | 1 | 100.00 | NULL |
| 1 | SIMPLE | g | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.e.group_id | 1 | 100.00 | NULL |
| 1 | SIMPLE | d | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.e.department_id | 1 | 100.00 | NULL |
| *1 | SIMPLE | dr | NULL | ref | tms_door_record_raw_card_no_index,tms_door_record_raw_record_time_index,record_time_card_no | record_time_card_no | 767 | tms.c.card_no | 266 | 1.27 | Using where; Using index |
| 1 | SIMPLE | ewt | NULL | ref | tms_emp_workschedule_reference_no_index,workschedule_date | tms_emp_workschedule_reference_no_index | 767 | tms.c.emp_no | 83 | 100.00 | Using where |
| 1 | SIMPLE | ew | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.ewt.workschedule_id | 1 | 100.00 | NULL |
| 1 | SIMPLE | egwt | NULL | ref | tms_emp_workschedule_reference_no_index,workschedule_date | tms_emp_workschedule_reference_no_index | 767 | tms.g.code | 83 | 100.00 | Using where |
| 1 | SIMPLE | egw | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.egwt.workschedule_id | 1 | 100.00 | NULL |
+----+-------------+-------+------------+--------+---------------------------------------------------------------------------------------------+-----------------------------------------+---------+--------------------------+------+----------+---------------------------------+
อัปเดต 2:
ลบการdrเข้าร่วม sql และแทนที่โดยที่มีเงื่อนไขที่แนะนำโดย @mendosi เปลี่ยนเวลาดำเนินการเป็น 0.60 วินาที
SELECT `c`.*,
`e`.`name` AS `employee_name`,
`e`.`emp_no`,
`d`.`code` AS `department_code`,
IF(ew.code IS NOT NULL, ew.code, egw.code) AS shift_code,
IF(ew.code IS NOT NULL, ew.time_in_from, egw.time_in_from) AS time_in_from,
IF(ew.code IS NOT NULL, ew.time_out_to, egw.time_out_to) AS time_out_to,
IF(ew.code IS NOT NULL, ew.next_day, egw.next_day) AS next_day
FROM `tms_emp_badge_card` AS `c`
LEFT JOIN `tms_employee` AS `e`
ON `c`.`emp_no` = `e`.`emp_no`
LEFT JOIN `tms_emp_group` AS `g`
ON `e`.`group_id` = `g`.`id`
LEFT JOIN `tms_emp_department` AS `d`
ON `e`.`department_id` = `d`.`id`
LEFT JOIN `tms_emp_workschedule` AS `ewt`
ON `ewt`.`workschedule_date` = "2016-11-01"
AND ( ewt.reference_no = c.emp_no
AND ewt.reference_type = "emp_no" )
LEFT JOIN `tms_workschedule` AS `ew`
ON `ewt`.`workschedule_id` = `ew`.`id`
LEFT JOIN `tms_emp_workschedule` AS `egwt`
ON `egwt`.`workschedule_date` = "2016-11-01"
AND ( egwt.reference_no = g.code
AND egwt.reference_type = "group_code" )
LEFT JOIN `tms_workschedule` AS `egw`
ON `egwt`.`workschedule_id` = `egw`.`id`
WHERE EXISTS (SELECT 1 FROM tms_door_record_raw As dr WHERE c.card_no = dr.card_no AND dr.record_time BETWEEN '2016-11-01' AND '2016-11-02')
ORDER BY c.emp_no;
ด้านล่างนี้คือคำอธิบายของ sql
+----+--------------------+-------+------------+--------+---------------------------------------------------------------------------------------------+-----------------------------------------+---------+--------------------------+------+----------+--------------------------+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+--------------------+-------+------------+--------+---------------------------------------------------------------------------------------------+-----------------------------------------+---------+--------------------------+------+----------+--------------------------+
| 1 | PRIMARY | c | NULL | ALL | NULL | NULL | NULL | NULL | 884 | 100.00 | Using where |
| 1 | PRIMARY | e | NULL | eq_ref | tms_employee_emp_no_unique | tms_employee_emp_no_unique | 767 | tms.c.emp_no | 1 | 100.00 | NULL |
| 1 | PRIMARY | g | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.e.group_id | 1 | 100.00 | NULL |
| 1 | PRIMARY | d | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.e.department_id | 1 | 100.00 | NULL |
| 1 | PRIMARY | ewt | NULL | ref | tms_emp_workschedule_reference_no_index,workschedule_date | tms_emp_workschedule_reference_no_index | 767 | tms.c.emp_no | 83 | 100.00 | Using where |
| 1 | PRIMARY | ew | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.ewt.workschedule_id | 1 | 100.00 | NULL |
| 1 | PRIMARY | egwt | NULL | ref | tms_emp_workschedule_reference_no_index,workschedule_date | tms_emp_workschedule_reference_no_index | 767 | tms.g.code | 83 | 100.00 | Using where |
| 1 | PRIMARY | egw | NULL | eq_ref | PRIMARY | PRIMARY | 4 | tms.egwt.workschedule_id | 1 | 100.00 | NULL |
| 2 | DEPENDENT SUBQUERY | dr | NULL | ref | tms_door_record_raw_card_no_index,tms_door_record_raw_record_time_index,record_time_card_no | record_time_card_no | 767 | tms.c.card_no | 266 | 1.27 | Using where; Using index |
+----+--------------------+-------+------------+--------+---------------------------------------------------------------------------------------------+-----------------------------------------+---------+--------------------------+------+----------+--------------------------+
LEFT JOIN:sความจำเป็นทั้งหมดหรือบางส่วนสามารถถูกแทนที่ด้วยINNER JOIN:s