Как удалить несколько объединений, это займет больше времени для выполнения. Как улучшить результат запроса - PullRequest
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Как удалить несколько объединений, это займет больше времени для выполнения. Как улучшить результат запроса

0 голосов
/ 19 ноября 2018

Я выполняю следующий запрос в базе данных MySQL, запрос работает нормально, но его выполнение занимает больше времени.Я пытаюсь оптимизировать запрос, но не нашел решения для его оптимизации.Пожалуйста, помогите мне оптимизировать запрос. 

SELECT count( distinct login_history.user_id) as total_count
FROM `login_history
JOIN (SELECT *
FROM `login_details` UNION SELECT *
FROM `deleted_login_details`) as login_details ON `login_details`.`l_id` = `login_history`.`user_id`
LEFT JOIN `group_learners` ON `group_learners`.`user_id`=`login_details`.`l_id` AND `group_learners`.`status` = "0"
LEFT JOIN `learner_custom_field_details` as `l14` ON `l14`.`learner_id` = `login_history`.`user_id`
LEFT JOIN `learner_custom_field_details` as `l16` ON `l16`.`learner_id` = `login_history`.`user_id`
LEFT JOIN `learner_custom_field_details` as `l17` ON `l17`.`learner_id` = `login_history`.`user_id`
LEFT JOIN `learner_custom_field_details` as `l18` ON `l18`.`learner_id` = `login_history`.`user_id`
LEFT JOIN `learner_custom_field_details` as `l19` ON `l19`.`learner_id` = `login_history`.`user_id`
LEFT JOIN `learner_custom_field_details` as `l20` ON `l20`.`learner_id` = `login_history`.`user_id`
LEFT JOIN `learner_custom_field_details` as `l21` ON `l21`.`learner_id` = `login_history`.`user_id`
LEFT JOIN `learner_custom_field_details` ON `learner_custom_field_details`.`learner_id` = `login_history`.`user_id`
WHERE `login_details`.`user_type` NOT IN('1', '2', '4')
AND ( 1=1
AND `l14`.`custom_field_id` = 14
AND `l14`.`custom_value` IN('1', '2')
AND  1=1)
AND ( 1=1
AND `l16`.`custom_field_id` = 16
AND `l16`.`custom_value` IN('3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '283')
AND  1=1)
AND ( 1=1
AND `l17`.`custom_field_id` = 17
AND `l17`.`custom_value` IN('25', '26', '27', '28', '29', '30', '31', '32', '33', '34', '35', '36', '37', '38', '39', '40', '41', '42', '43', '44', '45', '46', '47', '48', '49', '50', '51')
AND  1=1)
AND ( 1=1
AND `l18`.`custom_field_id` = 18
AND `l18`.`custom_value` IN('52', '53', '54', '55', '56', '57', '58', '59', '60', '61', '62', '63', '64', '65', '66', '67', '68', '69', '70', '71', '72', '73', '74', '75', '76', '77', '78')
AND  1=1)
AND ( 1=1
AND `l19`.`custom_field_id` = 19
AND `l19`.`custom_value` IN('79', '80', '81', '82', '83', '84', '85', '86', '87', '88', '89', '90', '91', '92', '93', '94', '95', '96')
AND  1=1)
AND ( 1=1
AND `l20`.`custom_field_id` = 20
AND `l20`.`custom_value` IN('97', '98', '99', '100', '101', '102', '103', '104', '105', '106', '107', '108', '109', '110', '111', '112', '113', '114', '115', '116', '117', '118', '119', '120', '121', '122', '123', '124', '125', '126', '127', '128', '129', '130', '131', '132', '133', '134', '135', '136', '137', '138', '139', '140', '142', '143', '144', '145', '146', '147', '148', '149', '150', '151', '152', '153', '154', '155', '156', '157', '158', '159', '160', '161', '162', '163', '164', '165', '166', '167', '168', '169', '170', '171', '172', '173', '174', '175', '176', '177', '178', '179', '180', '181', '182', '183', '184', '280')
AND  1=1)
AND ( 1=1
AND `l21`.`custom_field_id` = 21
AND `l21`.`custom_value` IN('185', '186', '187', '188', '189', '190', '191', '192', '193', '194', '195', '196', '197', '198', '199', '200', '201', '202', '203', '204', '205', '206', '207', '208', '209', '210', '211', '212', '213', '214', '215', '216', '217', '218', '219', '220', '221', '222', '223', '224', '225', '226', '227', '228', '229', '230', '231', '232', '233', '234', '235', '236', '237', '238', '239', '240', '241', '242', '243', '244', '245', '246', '247', '248', '249', '250', '251', '252', '253', '254', '255', '256', '257', '258', '259', '260', '261', '262', '263', '264', '265', '266', '267', '268', '269', '270', '272', '273', '274', '281', '282')
AND  1=1)
AND `login_details`.`l_branch` IN('1')

Ответы [ 2 ]

0 голосов
/ 19 ноября 2018

Это один из способов, но я уверен, что вы можете сделать вид из последней части соединения, которая имеет разные l18, l19, l20, ... затем сделать ваше соединение простым ... 

with cteUnion as (
SELECT *
 FROM `login_details` 
  WHERE `login_details`.`user_type` NOT IN('1', '2', '4') AND `login_details`.`l_branch` IN('1')
  UNION 
SELECT *
FROM 
`deleted_login_details`
),
group_learnersStatus as (
select * 
from `group_learners`
where `status` = "0"

),

SELECT count( distinct login_history.user_id), login_history.user_id as total_count
FROM `login_history
JOIN cteUnion as login_details ON `login_details`.`l_id` = `login_history`.`user_id`
LEFT JOIN group_learnersStatus ON `group_learners`.`user_id`=`login_details`.`l_id` 
LEFT JOIN `learner_custom_field_details` as `l14` ON `l14`.`learner_id` = `login_history`.`user_id` AND `l14`.`custom_field_id` = 14
AND `l14`.`custom_value` IN('1', '2')
LEFT JOIN `learner_custom_field_details` as `l16` ON `l16`.`learner_id` = `login_history`.`user_id` AND `l16`.`custom_field_id` = 16
AND `l16`.`custom_value` IN('3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '283')
LEFT JOIN `learner_custom_field_details` as `l17` ON `l17`.`learner_id` = `login_history`.`user_id` AND `l17`.`custom_field_id` = 17
AND `l17`.`custom_value` IN('25', '26', '27', '28', '29', '30', '31', '32', '33', '34', '35', '36', '37', '38', '39', '40', '41', '42', '43', '44', '45', '46', '47', '48', '49', '50', '51')
LEFT JOIN `learner_custom_field_details` as `l18` ON `l18`.`learner_id` = `login_history`.`user_id`  AND `l18`.`custom_field_id` = 18
AND `l18`.`custom_value` IN('52', '53', '54', '55', '56', '57', '58', '59', '60', '61', '62', '63', '64', '65', '66', '67', '68', '69', '70', '71', '72', '73', '74', '75', '76', '77', '78')
LEFT JOIN `learner_custom_field_details` as `l19` ON `l19`.`learner_id` = `login_history`.`user_id` AND `l19`.`custom_field_id` = 19
AND `l19`.`custom_value` IN('79', '80', '81', '82', '83', '84', '85', '86', '87', '88', '89', '90', '91', '92', '93', '94', '95', '96')
LEFT JOIN `learner_custom_field_details` as `l20` ON `l20`.`learner_id` = `login_history`.`user_id` AND `l20`.`custom_value` IN('97', '98', '99', '100', '101', '102', '103', '104', '105', '106', '107', '108', '109', '110', '111', '112', '113', '114', '115', '116', '117', '118', '119', '120', '121', '122', '123', '124', '125', '126', '127', '128', '129', '130', '131', '132', '133', '134', '135', '136', '137', '138', '139', '140', '142', '143', '144', '145', '146', '147', '148', '149', '150', '151', '152', '153', '154', '155', '156', '157', '158', '159', '160', '161', '162', '163', '164', '165', '166', '167', '168', '169', '170', '171', '172', '173', '174', '175', '176', '177', '178', '179', '180', '181', '182', '183', '184', '280')
LEFT JOIN `learner_custom_field_details` as `l21` ON `l21`.`learner_id` = `login_history`.`user_id` AND `l21`.`custom_field_id` = 21
AND `l21`.`custom_value` IN('185', '186', '187', '188', '189', '190', '191', '192', '193', '194', '195', '196', '197', '198', '199', '200', '201', '202', '203', '204', '205', '206', '207', '208', '209', '210', '211', '212', '213', '214', '215', '216', '217', '218', '219', '220', '221', '222', '223', '224', '225', '226', '227', '228', '229', '230', '231', '232', '233', '234', '235', '236', '237', '238', '239', '240', '241', '242', '243', '244', '245', '246', '247', '248', '249', '250', '251', '252', '253', '254', '255', '256', '257', '258', '259', '260', '261', '262', '263', '264', '265', '266', '267', '268', '269', '270', '272', '273', '274', '281', '282')
LEFT JOIN `learner_custom_field_details` ON `learner_custom_field_details`.`learner_id` = `login_history`.`user_id`
0 голосов
/ 19 ноября 2018

Я хотел бы попробовать следующее 

SELECT
    COUNT( user_id ) AS total_count
FROM (
    SELECT
        login_history.user_id
    FROM login_history
    INNER JOIN group_learners ON group_learners.user_id = login_history.user_id
        AND group_learners.status = "0"
    UNION
    SELECT
        login_history.user_id
    FROM login_history
    INNER JOIN learner_custom_field_details AS l14 ON login_history.user_id = login_history.user_id
        AND l14.custom_field_id = 14
        AND l14.custom_value IN ('1', '2')
    UNION
    SELECT
        login_history.user_id
    FROM login_history
    INNER JOIN learner_custom_field_details AS l16 ON l16.learner_id = login_history.user_id
        AND l16.custom_field_id = 16
        AND l16.custom_value IN ('3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '283')
    UNION
    SELECT
        login_history.user_id
    FROM login_history
    INNER JOIN learner_custom_field_details AS l17 ON l17.learner_id = login_history.user_id
        AND l17.custom_field_id = 17
        AND l17.custom_value IN ('25', '26', '27', '28', '29', '30', '31', '32', '33', '34', '35', '36', '37', '38', '39', '40', '41', '42', '43', '44', '45', '46', '47', '48', '49', '50', '51')
    UNION
    SELECT
        login_history.user_id
    FROM login_history
    INNER JOIN learner_custom_field_details AS l18 ON l18.learner_id = login_history.user_id
        AND l18.custom_field_id = 18
        AND l18.custom_value IN ('52', '53', '54', '55', '56', '57', '58', '59', '60', '61', '62', '63', '64', '65', '66', '67', '68', '69', '70', '71', '72', '73', '74', '75', '76', '77', '78')
    UNION
    SELECT
        login_history.user_id
    FROM login_history
    INNER JOIN learner_custom_field_details AS l19 ON l19.learner_id = login_history.user_id
        AND l19.custom_field_id = 19
        AND l19.custom_value IN ('79', '80', '81', '82', '83', '84', '85', '86', '87', '88', '89', '90', '91', '92', '93', '94', '95', '96')
    UNION
    SELECT
        login_history.user_id
    FROM login_history
    INNER JOIN learner_custom_field_details AS l20 ON l20.learner_id = login_history.user_id
        AND l20.custom_field_id = 20
        AND l20.custom_value IN ('97', '98', '99', '100', '101', '102', '103', '104', '105', '106', '107', '108', '109', '110', '111', '112', '113', '114', '115', '116', '117', '118', '119', '120', '121', '122', '123', '124', '125', '126', '127', '128', '129', '130', '131', '132', '133', '134', '135', '136', '137', '138', '139', '140', '142', '143', '144', '145', '146', '147', '148', '149', '150', '151', '152', '153', '154', '155', '156', '157', '158', '159', '160', '161', '162', '163', '164', '165', '166', '167', '168', '169', '170', '171', '172', '173', '174', '175', '176', '177', '178', '179', '180', '181', '182', '183', '184', '280')
    UNION
    SELECT
        login_history.user_id
    FROM login_history
    INNER JOIN learner_custom_field_details AS l21 ON l21.learner_id = login_history.user_id
        AND l21.custom_field_id = 21
        AND l21.custom_value IN ('185', '186', '187', '188', '189', '190', '191', '192', '193', '194', '195', '196', '197', '198', '199', '200', '201', '202', '203', '204', '205', '206', '207', '208', '209', '210', '211', '212', '213', '214', '215', '216', '217', '218', '219', '220', '221', '222', '223', '224', '225', '226', '227', '228', '229', '230', '231', '232', '233', '234', '235', '236', '237', '238', '239', '240', '241', '242', '243', '244', '245', '246', '247', '248', '249', '250', '251', '252', '253', '254', '255', '256', '257', '258', '259', '260', '261', '262', '263', '264', '265', '266', '267', '268', '269', '270', '272', '273', '274', '281', '282')
    UNION
    SELECT
        login_history.user_id
    FROM login_history
    INNER JOIN learner_custom_field_details ON learner_custom_field_details.learner_id = login_history.user_id
) u
WHERE (
EXISTS (
    SELECT
        NULL
    FROM login_details
    WHERE user_type NOT IN ('1', '2', '4')
    AND l_branch IN ('1')
    AND user_id = u.user_id
    )
OR EXISTS (
    SELECT
        NULL
    FROM deleted_login_details
    WHERE user_type NOT IN ('1', '2', '4')
    AND l_branch IN ('1')
    AND user_id = u.user_id
    )
)
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