我尽力优化以下查询：
SELECT
prov,
role,
COUNT(*) AS visits,
charge_amt,
charge_amt * COUNT(*) AS AvgCharge,
SUM(IFNULL(FORMAT(qty * (COALESCE(WithMod.work_rvu, WithoutMod.work_rvu)),
2),
'')) AS WorkRVU,
SUM(IFNULL(FORMAT(qty * (COALESCE(WithMod.work_rvu, WithoutMod.work_rvu)),
2),
'')) / SUM(IFNULL(FORMAT(qty * (COALESCE(WithMod.work_rvu, WithoutMod.work_rvu) + COALESCE(WithMod.fac_pe_rvu,
WithoutMod.fac_pe_rvu) + COALESCE(WithMod.mp_rvu, WithoutMod.mp_rvu)),
2),
'')) AS AvgWorkRVU,
SUM(IFNULL(FORMAT(qty * (COALESCE(WithMod.mp_rvu, WithoutMod.mp_rvu)),
2),
'')) AS MALRVU,
SUM(IFNULL(FORMAT(qty * (COALESCE(WithMod.mp_rvu, WithoutMod.mp_rvu)),
2),
'')) / SUM(IFNULL(FORMAT(qty * (COALESCE(WithMod.work_rvu, WithoutMod.work_rvu) + COALESCE(WithMod.fac_pe_rvu,
WithoutMod.fac_pe_rvu) + COALESCE(WithMod.mp_rvu, WithoutMod.mp_rvu)),
2),
'')) AS AvgMalRVU,
SUM(IFNULL(FORMAT(qty * (COALESCE(WithMod.fac_pe_rvu,
WithoutMod.fac_pe_rvu)),
2),
'')) AS PERVU,
SUM(IFNULL(FORMAT(qty * (COALESCE(WithMod.fac_pe_rvu,
WithoutMod.fac_pe_rvu)),
2),
'')) / SUM(IFNULL(FORMAT(qty * (COALESCE(WithMod.work_rvu, WithoutMod.work_rvu) + COALESCE(WithMod.fac_pe_rvu,
WithoutMod.fac_pe_rvu) + COALESCE(WithMod.mp_rvu, WithoutMod.mp_rvu)),
2),
'')) AS AvgPervRVU,
SUM(IFNULL(FORMAT(qty * (COALESCE(WithMod.work_rvu, WithoutMod.work_rvu) + COALESCE(WithMod.fac_pe_rvu,
WithoutMod.fac_pe_rvu) + COALESCE(WithMod.mp_rvu, WithoutMod.mp_rvu)),
2),
'')) AS TotalRvu,
SUM(IFNULL(FORMAT(qty * (COALESCE(WithMod.work_rvu, WithoutMod.work_rvu) + COALESCE(WithMod.fac_pe_rvu,
WithoutMod.fac_pe_rvu) + COALESCE(WithMod.mp_rvu, WithoutMod.mp_rvu)),
2),
'')) / COUNT(*) AS AvgTotalRvu
FROM
(SELECT
CAST(`e`.`encounter_dos` AS DATE) AS `encounter_dos`,
`e`.`encounter_uid` AS `encounter_uid`,
`ed`.`work_item_uid` AS `work_item_uid`,
`e`.`encounter_ins_1` AS `encounter_ins_1`,
`ed`.`encounter_status` AS `encounter_status`,
MAX((((`pro`.`em_level` <> '0')
OR (`fac`.`em_level` <> '0'))
AND (`ed`.`encounter_status` = 'DE_COMPLETE'))) AS `Billed`,
MAX(((ISNULL(`pro`.`em_level`)
OR (`pro`.`em_level` = '0'))
AND (ISNULL(`fac`.`em_level`)
OR (`fac`.`em_level` = '0'))
AND (`ed`.`encounter_status` IN ('DE_COMPLETE' , 'DE_LWBS', 'LWBS')))) AS `NoCharge`
FROM
(((`tbl_encounter` `e`
JOIN `tbl_encounter_detail` `ed` ON ((`e`.`encounter_uid` = `ed`.`encounter_uid`)))
LEFT JOIN `tbl_event_em_pro` `pro` ON (((`pro`.`encounter_uid` = `e`.`encounter_uid`)
AND (`pro`.`work_item_uid` = `ed`.`work_item_uid`))))
LEFT JOIN `tbl_event_em_fac` `fac` ON (((`fac`.`encounter_uid` = `e`.`encounter_uid`)
AND (`fac`.`work_item_uid` = `ed`.`work_item_uid`))))
WHERE
(`ed`.`encounter_status` IN ('COMPLETE' , 'DE_COMPLETE', 'DE_HOLD', 'DE_IN_PROGRESS', 'DE_LWBS', 'DE_PRO_IN_PROGRESS', 'DE_PRO_READY', 'DE_TEC_IN_PROGRESS', 'DE_TEC_READY', 'IN_PROGRESS', 'IN_QA', 'LWBS', 'OPEN', 'REGISTERED', 'SUSPEND', 'TRANSFER', 'VISIT_COMPLETE', 'VISIT_IN_PROGRESS'))
GROUP BY `e`.`encounter_uid` , `ed`.`work_item_uid`) vw
JOIN
tbl_encounter USING (encounter_uid)
JOIN
tbl_work_item USING (work_item_uid)
JOIN
tbl_facility ON tbl_facility.facility_id = tbl_work_item.facility_id
JOIN
(SELECT
work_item_uid,
encounter_uid,
em_level AS cpt,
1 AS qty,
em_modifier1 AS mod1,
mid AS Prov,
'MLP PRIMARY' AS Role
FROM
tbl_event_em_pro
WHERE
em_level <> '0' AND mid <> ''
AND shared = 0 UNION ALL SELECT
work_item_uid,
encounter_uid,
em_level AS cpt,
1 AS qty,
em_modifier1 AS mod1,
em_provider,
'PHYSICIAN (NO SEC)'
FROM
tbl_event_em_pro
WHERE
em_level <> '0' AND mid <> ''
AND shared = 1 UNION ALL SELECT
work_item_uid,
encounter_uid,
em_level AS cpt,
1 AS qty,
em_modifier1 AS mod1,
em_provider,
'PHYSICIAN (NO SEC)'
FROM
tbl_event_em_pro
WHERE
em_level <> '0' AND mid = ''
AND shared = 0 UNION ALL SELECT
cpt.work_item_uid,
cpt.encounter_uid,
cpt.procedure_num,
GREATEST(1, cpt.procedure_qty),
cpt.procedure_modifier1,
em.em_provider,
'PHYSICIAN (NO SEC)'
FROM
tbl_event_cpt_pro cpt
JOIN tbl_event_em_pro em USING (encounter_uid)
WHERE
em.mid <> '' AND em.shared = 1 UNION ALL SELECT
cpt.work_item_uid,
cpt.encounter_uid,
cpt.procedure_num,
GREATEST(1, cpt.procedure_qty),
cpt.procedure_modifier1,
em.mid,
'MLP PRIMARY'
FROM
tbl_event_cpt_pro cpt
JOIN tbl_event_em_pro em USING (encounter_uid)
WHERE
em.mid <> '' AND em.shared = 0 UNION ALL SELECT
cpt.work_item_uid,
cpt.encounter_uid,
cpt.procedure_num,
GREATEST(1, cpt.procedure_qty),
cpt.procedure_modifier1,
em.em_provider,
'PHYSICIAN (NO SEC)'
FROM
tbl_event_cpt_pro cpt
JOIN tbl_event_em_pro em USING (encounter_uid)
WHERE
em.mid = '' AND em.shared = 0) T USING (work_item_uid , encounter_uid)
LEFT JOIN
(SELECT
work_item_uid,
cpt_hcpcs_code AS cpt,
MIN(client_proc_desc) AS client_proc_desc,
client_proc_desc AS descrip,
charge_amt AS charge_amt
FROM
tbl_charge_master
WHERE
charge_type = 'ED_PROFEE'
AND effective_date = '2015-01-01'
GROUP BY work_item_uid , cpt_hcpcs_code) cm USING (work_item_uid , cpt)
LEFT JOIN
tbl_rvu_master WithMod ON WithMod.hcpcs = cpt
AND WithMod.modifier = mod1
AND WithMod.effective_date = '2015-01-01'
LEFT JOIN
tbl_rvu_master WithoutMod ON WithoutMod.hcpcs = cpt
AND WithoutMod.modifier = ''
AND WithoutMod.effective_date = '2015-01-01'
LEFT JOIN
tbl_cpt_blacklist bl ON bl.cpt_code = cpt
AND bl.charge_type = 'ED_PROFEE'
AND (bl.work_item_uid IS NULL
OR bl.work_item_uid = vw.work_item_uid)
WHERE
bl.cpt_code IS NULL AND Billed
GROUP BY prov , role
ORDER BY vw.encounter_dos , patient_fin , prov;
以下是上述查询的解释输出：
---+-----------------------------------------------------+--------+---------------------------------------------------------------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+--------------+--------------------+--------+-------------------------------------------------------------------------------------------------+--------------+---------+-----------------------------------------------------+--------+---------------------------------------------------------------------+
| 1 | PRIMARY | tbl_work_item | index | PRIMARY,unique_wi_fac,idx_facility,idx_wi | idx_facility | 4 | NULL | 60 | Using index; Using temporary; Using filesort |
| 1 | PRIMARY | tbl_facility | eq_ref | PRIMARY | PRIMARY | 4 | clear21.tbl_work_item.facility_id | 1 | Using index |
| 1 | PRIMARY | <derived3> | ref | <auto_key0> | <auto_key0> | 4 | clear21.tbl_work_item.work_item_uid | 3961 | NULL |
| 1 | PRIMARY | tbl_encounter | eq_ref | PRIMARY | PRIMARY | 4 | T.encounter_uid | 1 | NULL |
| 1 | PRIMARY | <derived2> | ref | <auto_key0> | <auto_key0> | 8 | T.encounter_uid,clear21.tbl_work_item.work_item_uid | 4329 | Using where |
| 1 | PRIMARY | <derived9> | ref | <auto_key0> | <auto_key0> | 42 | clear21.tbl_work_item.work_item_uid,T.cpt | 1074 | Using where |
| 1 | PRIMARY | WithMod | eq_ref | PRIMARY | PRIMARY | 67 | T.cpt,T.mod1,const | 1 | NULL |
| 1 | PRIMARY | WithoutMod | eq_ref | PRIMARY | PRIMARY | 67 | T.cpt,const,const | 1 | Using where |
| 1 | PRIMARY | bl | ref | cpt_code,work_item_uid,charge_type | cpt_code | 121 | T.cpt,const | 1 | Using where; Not exists; Using index |
| 9 | DERIVED | tbl_charge_master | ref | uniq_wi_type_date_cpt_cat,charge_type,wi_pt_ft_hcpcs_date,idx_wi_type_dt_cpt,idx_wi_type_cpt_dt | charge_type | 98 | const | 107469 | Using index condition; Using where; Using temporary; Using filesort |
| 3 | DERIVED | tbl_event_em_pro | ALL | em_level,idx_mid_em_shared | NULL | NULL | NULL | 236913 | Using where |
| 4 | UNION | tbl_event_em_pro | ALL | em_level,idx_mid_em_shared | NULL | NULL | NULL | 236913 | Using where |
| 5 | UNION | tbl_event_em_pro | ALL | em_level,idx_mid_em_shared | NULL | NULL | NULL | 236913 | Using where |
| 6 | UNION | cpt | ALL | idx_enc_uid | NULL | NULL | NULL | 13554 | NULL |
| 6 | UNION | em | ref | idx_enc_uid | idx_enc_uid | 4 | clear21.cpt.encounter_uid | 1 | Using where |
| 7 | UNION | cpt | ALL | idx_enc_uid | NULL | NULL | NULL | 13554 | NULL |
| 7 | UNION | em | ref | idx_enc_uid | idx_enc_uid | 4 | clear21.cpt.encounter_uid | 1 | Using where |
| 8 | UNION | cpt | ALL | idx_enc_uid | NULL | NULL | NULL | 13554 | NULL |
| 8 | UNION | em | ref | idx_enc_uid | idx_enc_uid | 4 | clear21.cpt.encounter_uid | 1 | Using where |
| NULL | UNION RESULT | <union3,4,5,6,7,8> | ALL | NULL | NULL | NULL | NULL | NULL | Using temporary |
| 2 | DERIVED | ed | ALL | idx_enc_uid,encounter_status | NULL | NULL | NULL | 529111 | Using where; Using temporary; Using filesort |
| 2 | DERIVED | e | eq_ref | PRIMARY | PRIMARY | 4 | clear21.ed.encounter_uid | 1 | NULL |
| 2 | DERIVED | pro | ref | idx_enc_uid,work_item_uid,work_item_uid_2 | idx_enc_uid | 4 | clear21.ed.encounter_uid | 1 | Using where |
| 2 | DERIVED | fac | ref | idx_enc_uid,work_item_uid,work_item_uid_2,encounter_uid | idx_enc_uid | 4 | clear21.ed.encounter_uid | 1 | Using where |
+----+--------------+--------------------+--------+-------------------------------------------------------------------------------------------------+--------------+---------+-----------------------------------------------------+--------+---------------------------------------------------------------------+
24 rows in set (0.00 sec)
虽然我从查询中替换了视图以进行一些优化。它的执行速度很慢。
如何修改SQL以将执行时间减少到最少？ 任何建议/改进都会对我有所帮助。
表格：tbl_event_em_pro
CREATE TABLE `tbl_event_em_pro` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`encounter_uid` int(11) NOT NULL,
`em_level` varchar(10) NOT NULL,
`em_modifier1` varchar(10) DEFAULT NULL,
`em_modifier2` varchar(10) DEFAULT NULL,
`em_provider` varchar(75) DEFAULT NULL,
`em_midlevel` varchar(75) DEFAULT NULL,
`em_type` varchar(10) DEFAULT NULL,
`em_downcode` int(1) NOT NULL DEFAULT '0',
`em_reason` varchar(20) DEFAULT NULL,
`mdm_total` varchar(20) DEFAULT NULL,
`userid` varchar(50) NOT NULL,
`user_time_entered` datetime NOT NULL,
`qa_disagree` tinyint(1) NOT NULL DEFAULT '0',
`qa_procedure_num` varchar(10) DEFAULT NULL,
`qa_procedure_qty` int(5) DEFAULT NULL,
`qa_procedure_modifier` varchar(10) DEFAULT NULL,
`qa_procedure_provider` varchar(75) DEFAULT NULL,
`qa_note` varchar(255) DEFAULT NULL,
`qa_userid` varchar(50) DEFAULT NULL,
`qa_user_time_entered` datetime DEFAULT NULL,
`qa_reason` varchar(75) DEFAULT NULL,
`mid` varchar(75) DEFAULT NULL,
`dos` date DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `idx_enc_uid` (`encounter_uid`),
KEY `em_provider` (`em_provider`),
KEY `em_midlevel` (`em_midlevel`),
KEY `qa_procedure_provider` (`qa_procedure_provider`),
KEY `userid` (`userid`),
KEY `qa_userid` (`qa_userid`),
KEY `work_item_uid` (`work_item_uid`),
KEY `work_item_uid_2` (`work_item_uid`,`encounter_uid`),
KEY `em_level` (`em_level`),
KEY `mdm_total` (`mdm_total`),
KEY `cosigning_physician` (`cosigning_physician`),
KEY `idx_mid_em_shared` (`em_level`,`mid`,`shared`),
CONSTRAINT `tbl_event_em_pro_ibfk_1` FOREIGN KEY (`encounter_uid`) REFERENCES `tbl_encounter` (`encounter_uid`),
CONSTRAINT `tbl_event_em_pro_ibfk_10` FOREIGN KEY (`work_item_uid`) REFERENCES `tbl_work_item` (`work_item_uid`) ON DELETE CASCADE,
CONSTRAINT `tbl_event_em_pro_ibfk_11` FOREIGN KEY (`userid`) REFERENCES `tbl_user` (`user_email_address`),
CONSTRAINT `tbl_event_em_pro_ibfk_12` FOREIGN KEY (`work_item_uid`, `encounter_uid`) REFERENCES `tbl_encounter_detail` (`work_item_uid`, `encounter_uid`),
CONSTRAINT `tbl_event_em_pro_ibfk_15` FOREIGN KEY (`cosigning_physician`) REFERENCES `tbl_provider` (`provider_lov`),
CONSTRAINT `tbl_event_em_pro_ibfk_2` FOREIGN KEY (`em_provider`) REFERENCES `tbl_provider` (`provider_lov`),
CONSTRAINT `tbl_event_em_pro_ibfk_3` FOREIGN KEY (`em_midlevel`) REFERENCES `tbl_provider` (`provider_lov`),
CONSTRAINT `tbl_event_em_pro_ibfk_4` FOREIGN KEY (`qa_procedure_provider`) REFERENCES `tbl_provider` (`provider_lov`),
CONSTRAINT `tbl_event_em_pro_ibfk_5` FOREIGN KEY (`userid`) REFERENCES `tbl_user` (`user_email_address`),
CONSTRAINT `tbl_event_em_pro_ibfk_6` FOREIGN KEY (`qa_userid`) REFERENCES `tbl_user` (`user_email_address`),
CONSTRAINT `tbl_event_em_pro_ibfk_7` FOREIGN KEY (`work_item_uid`) REFERENCES `tbl_work_item` (`work_item_uid`),
CONSTRAINT `tbl_event_em_pro_ibfk_9` FOREIGN KEY (`encounter_uid`) REFERENCES `tbl_encounter` (`encounter_uid`) ON DELETE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=21282825 DEFAULT CHARSET=utf8
表格：tbl_event_cpt_pro
CREATE TABLE `tbl_event_cpt_pro` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`encounter_uid` int(11) NOT NULL,
`procedure_num` varchar(10) NOT NULL,
`procedure_qty` int(11) NOT NULL DEFAULT '1',
`procedure_modifier1` varchar(10) DEFAULT NULL,
`procedure_modifier2` varchar(10) DEFAULT NULL,
`procedure_provider` varchar(75) DEFAULT NULL,
`mid_provider` varchar(75) DEFAULT NULL,
`userid` varchar(50) NOT NULL,
`user_time_entered` datetime NOT NULL,
`qa_disagree` tinyint(1) NOT NULL DEFAULT '0',
`qa_procedure_num` varchar(10) DEFAULT NULL,
`qa_procedure_qty` int(5) DEFAULT NULL,
`qa_procedure_modifier` varchar(10) DEFAULT NULL,
`qa_procedure_provider` varchar(75) DEFAULT NULL,
`qa_note` varchar(255) DEFAULT NULL,
`qa_userid` varchar(50) DEFAULT NULL,
`qa_user_time_entered` datetime DEFAULT NULL,
`qa_reason` varchar(75) DEFAULT NULL,
`dos` date DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `idx_enc_uid` (`encounter_uid`),
KEY `procedure_provider` (`procedure_provider`),
KEY `mid_provider` (`mid_provider`),
KEY `qa_procedure_provider` (`qa_procedure_provider`),
KEY `userid` (`userid`),
KEY `qa_userid` (`qa_userid`),
KEY `work_item_uid` (`work_item_uid`),
KEY `work_item_uid_2` (`work_item_uid`,`encounter_uid`),
KEY `cosigning_physician` (`cosigning_physician`),
CONSTRAINT `tbl_event_cpt_pro_ibfk_1` FOREIGN KEY (`encounter_uid`) REFERENCES `tbl_encounter` (`encounter_uid`),
CONSTRAINT `tbl_event_cpt_pro_ibfk_10` FOREIGN KEY (`work_item_uid`) REFERENCES `tbl_work_item` (`work_item_uid`) ON DELETE CASCADE,
CONSTRAINT `tbl_event_cpt_pro_ibfk_11` FOREIGN KEY (`userid`) REFERENCES `tbl_user` (`user_email_address`),
CONSTRAINT `tbl_event_cpt_pro_ibfk_12` FOREIGN KEY (`work_item_uid`, `encounter_uid`) REFERENCES `tbl_encounter_detail` (`work_item_uid`, `encounter_uid`),
CONSTRAINT `tbl_event_cpt_pro_ibfk_13` FOREIGN KEY (`cosigning_physician`) REFERENCES `tbl_provider` (`provider_lov`),
CONSTRAINT `tbl_event_cpt_pro_ibfk_2` FOREIGN KEY (`procedure_provider`) REFERENCES `tbl_provider` (`provider_lov`),
CONSTRAINT `tbl_event_cpt_pro_ibfk_3` FOREIGN KEY (`mid_provider`) REFERENCES `tbl_provider` (`provider_lov`),
CONSTRAINT `tbl_event_cpt_pro_ibfk_4` FOREIGN KEY (`qa_procedure_provider`) REFERENCES `tbl_provider` (`provider_lov`),
CONSTRAINT `tbl_event_cpt_pro_ibfk_5` FOREIGN KEY (`userid`) REFERENCES `tbl_user` (`user_email_address`),
CONSTRAINT `tbl_event_cpt_pro_ibfk_6` FOREIGN KEY (`qa_userid`) REFERENCES `tbl_user` (`user_email_address`),
CONSTRAINT `tbl_event_cpt_pro_ibfk_7` FOREIGN KEY (`work_item_uid`) REFERENCES `tbl_work_item` (`work_item_uid`),
CONSTRAINT `tbl_event_cpt_pro_ibfk_9` FOREIGN KEY (`encounter_uid`) REFERENCES `tbl_encounter` (`encounter_uid`) ON DELETE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=21014137 DEFAULT CHARSET=utf8
答案 0 :(得分：1)
似乎首先，tbl_event_em_pro需要encounter_uid中的索引。请注意，在EXPLAIN中，这些行如何说'ALL'并且行数很多。
当LEFT JOIN足够时，请勿使用JOIN;它限制了Optimizer的选择。
如需进一步帮助，我们需要：
更好的缩进，以便我们可以看到连接，联合，子查询等的嵌套结构。
SHOW CREATE TABLE至少对于关键表来说。
<强>更新
tbl_charge_master需要INDEX(charge_type, effective_date)
隔离并计时。如果它很慢，我认为，让我们专注于优化它。看看你是否可以摆脱UNION并使用CASE...。
SELECT work_item_uid, encounter_uid, em_level AS cpt, 1 AS qty,
em_modifier1 AS mod1, mid AS Prov, 'MLP PRIMARY' AS Role
FROM tbl_event_em_pro
WHERE em_level <> '0'
AND mid <> ''
AND shared = 0
UNION ALL
SELECT work_item_uid, encounter_uid, em_level AS cpt, 1 AS qty,
em_modifier1 AS mod1, em_provider, 'PHYSICIAN (NO SEC)'
FROM tbl_event_em_pro
WHERE em_level <> '0'
AND mid <> ''
AND shared = 1
UNION ALL
SELECT work_item_uid, encounter_uid, em_level AS cpt, 1 AS qty,
em_modifier1 AS mod1, em_provider, 'PHYSICIAN (NO SEC)'
FROM tbl_event_em_pro
WHERE em_level <> '0'
AND mid = ''
AND shared = 0
UNION ALL
SELECT cpt.work_item_uid, cpt.encounter_uid, cpt.procedure_num,
GREATEST(1, cpt.procedure_qty), cpt.procedure_modifier1,
em.em_provider, 'PHYSICIAN (NO SEC)'
FROM tbl_event_cpt_pro cpt
JOIN tbl_event_em_pro em USING (encounter_uid)
WHERE em.mid <> ''
AND em.shared = 1
UNION ALL
SELECT cpt.work_item_uid, cpt.encounter_uid, cpt.procedure_num,
GREATEST(1, cpt.procedure_qty), cpt.procedure_modifier1,
em.mid, 'MLP PRIMARY'
FROM tbl_event_cpt_pro cpt
JOIN tbl_event_em_pro em USING (encounter_uid)
WHERE em.mid <> ''
AND em.shared = 0
UNION ALL
SELECT cpt.work_item_uid, cpt.encounter_uid, cpt.procedure_num,
GREATEST(1, cpt.procedure_qty), cpt.procedure_modifier1,
em.em_provider, 'PHYSICIAN (NO SEC)'
FROM tbl_event_cpt_pro cpt
JOIN tbl_event_em_pro em USING (encounter_uid)
WHERE em.mid = ''
AND em.shared = 0) T USING (work_item_uid , encounter_uid)