你觉得这个有什么问题吗？
想要达到第二秒以下的执行时间，是否可能？
请询问您可能需要的任何其他数据，以了解数据库的结构。欢迎任何提示和技巧！
SELECT
ORD_CLI.COD_AGE,
ORD_CLI_RIGHE.DOC_ID,
OFF_CLI.off_cli_id,
ORD_CLI_RIGHE.DOC_RIGA_ID,
ORD_CLI_RIGHE.COD_ART,
ART_PESO.PESO_ART,
ORD_CLI.ANNO_DOC,
ORD_CLI.NUM_DOC,
ORD_CLI.SERIE_DOC,
ORD_CLI.DATA_DOC,
CF.RAG_SOC_CF,
AGENTI.NOME_AGE,
ORD_CLI.COD_CF,
ORD_CLI.COD_IVA,
ORD_CLI.COD_DEP,
ORD_CLI_TOT.IMPONIBILE_V1 AS IMPONIBILE_ORDINE,
FATT_CLI_TOT.IMPONIBILE_V1 AS IMPONIBILE_FATTURA,
ORD_CLI_TOT.IVA_V1,
SUM(ART_PESO.PESO_ART) AS weight,
SUM(FATT_CLI_RIGHE.QUANT_RIGA) AS quantity,
SUM(FATT_CLI_RIGHE.QUANT_RIGA*FATT_CLI_RIGHE.PREZZO_LORDO_VU1) AS sell_price,
SUM(FATT_CLI_RIGHE.QUANT_RIGA*DDT_FOR_RIGHE.PREZZO_LORDO_VU1) AS acqisition_price1,
SUM(FATT_CLI_RIGHE.QUANT_RIGA*FATT_FOR_RIGHE.PREZZO_LORDO_VU1) AS acqisition_price2,
SUM(FATT_CLI_RIGHE.QUANT_RIGA*FATT_CLI_RIGHE_PROVV.IMPORTO_PROVV_VU1) AS agent_reward,
SUM(FATT_CLI_RIGHE.QUANT_RIGA*ART_PESO.PESO_ART * 0.13) AS transport_price,
SUM(FATT_CLI_RIGHE.QUANT_RIGA*(
FATT_CLI_RIGHE.PREZZO_LORDO_VU1
- COALESCE(DDT_FOR_RIGHE.PREZZO_LORDO_VU1, 0)
- COALESCE(FATT_FOR_RIGHE.PREZZO_LORDO_VU1, 0)
- COALESCE(FATT_CLI_RIGHE_PROVV.IMPORTO_PROVV_VU1, 0)
- COALESCE(ART_PESO.PESO_ART, 0) * 0.13
)) AS net_earning,
OFF_CLI.stima_prezzo_acquisto,
OFF_CLI.stima_prezzo_trasporto,
OFF_CLI.stima_provvigioni_agenti,
OFF_CLI.stima_utile
FROM ORD_CLI
INNER JOIN ORD_CLI_RIGHE
ON ORD_CLI_RIGHE.DOC_ID = ORD_CLI.DOC_ID
LEFT JOIN ORD_CLI_RIGHE_SPEC
ON ORD_CLI_RIGHE.DOC_RIGA_ID = ORD_CLI_RIGHE_SPEC.DOC_RIGA_ID
INNER JOIN ART_PESO
ON ART_PESO.COD_ART = ORD_CLI_RIGHE.COD_ART
INNER JOIN ORD_CLI_TOT
ON ORD_CLI.DOC_ID = ORD_CLI_TOT.DOC_ID
INNER JOIN AGENTI
ON AGENTI.COD_AGE = ORD_CLI.COD_AGE
INNER JOIN CF
ON CF.COD_CF = ORD_CLI.COD_CF
LEFT JOIN FATT_CLI_RIGHE_SPEC
ON ORD_CLI_RIGHE.DOC_RIGA_ID = FATT_CLI_RIGHE_SPEC.ORD_RIGA_ID
LEFT JOIN FATT_CLI_RIGHE
ON FATT_CLI_RIGHE.DOC_RIGA_ID = FATT_CLI_RIGHE_SPEC.DOC_RIGA_ID
LEFT JOIN FATT_CLI_TOT
ON FATT_CLI_RIGHE.DOC_ID = FATT_CLI_TOT.DOC_ID
LEFT JOIN FATT_CLI_RIGHE_PROVV
ON FATT_CLI_RIGHE_PROVV.DOC_RIGA_ID = FATT_CLI_RIGHE_SPEC.DOC_RIGA_ID
LEFT JOIN FATT_CLI_RIGHE_LOTTI
ON FATT_CLI_RIGHE_LOTTI.DOC_RIGA_ID = FATT_CLI_RIGHE_SPEC.DOC_RIGA_ID
LEFT JOIN DDT_FOR_RIGHE_LOTTI
ON DDT_FOR_RIGHE_LOTTI.COD_LOT = FATT_CLI_RIGHE_LOTTI.COD_LOT
LEFT JOIN DDT_FOR_RIGHE
ON DDT_FOR_RIGHE.DOC_RIGA_ID = DDT_FOR_RIGHE_LOTTI.DOC_RIGA_ID
LEFT JOIN FATT_FOR_RIGHE
ON FATT_FOR_RIGHE.DOC_RIGA_ID = FATT_CLI_RIGHE_LOTTI.COD_LOT
LEFT JOIN OFF_CLI_RIGHE
ON OFF_CLI_RIGHE.DOC_RIGA_ID = ORD_CLI_RIGHE_SPEC.OFF_RIGA_ID
LEFT JOIN OFF_CLI
ON OFF_CLI.DOC_ID = OFF_CLI_RIGHE.DOC_ID
WHERE
ORD_CLI.COD_BUSN_UN='P'
AND OFF_CLI_RIGHE.DOC_RIGA_ID IS NOT NULL
AND ORD_CLI.DATA_DOC >= '2012-11-29'
AND ORD_CLI.DATA_DOC <= '2013-02-28'
GROUP BY ORD_CLI.DOC_ID
ORDER BY ORD_CLI.DATA_DOC
DESC LIMIT 30 OFFSET 0
执行时间
Showing rows 0 - 29 ( 30 total, Query took 6.3458 sec)
查询的解析
+----+-------------+----------------------+--------+-----------------------------------------------------------------------------+----------------------------------+---------+--------------------------------------------+------+----------+----------------------------------------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+-------------+----------------------+--------+-----------------------------------------------------------------------------+----------------------------------+---------+--------------------------------------------+------+----------+----------------------------------------------+
| 1 | SIMPLE | ORD_CLI | range | PRIMARY,ORD_CLI_DATA_DOC,ORD_CLI_COD_CF,ORD_CLI_COD_BUSN_UN,ORD_CLI_COD_AGE | ORD_CLI_DATA_DOC | 4 | NULL | 3728 | 100.00 | Using where; Using temporary; Using filesort |
| 1 | SIMPLE | AGENTI | eq_ref | PRIMARY | PRIMARY | 38 | ORD_CLI.COD_AGE | 1 | 100.00 | Using where |
| 1 | SIMPLE | CF | eq_ref | PRIMARY | PRIMARY | 38 | ORD_CLI.COD_CF | 1 | 100.00 | |
| 1 | SIMPLE | ORD_CLI_TOT | eq_ref | PRIMARY | PRIMARY | 62 | ORD_CLI.DOC_ID | 1 | 100.00 | |
| 1 | SIMPLE | ORD_CLI_RIGHE | ref | PRIMARY,ORD_CLI_RIGHE_DOC_ID,ORD_CLI_RIGHE_COD_ART | ORD_CLI_RIGHE_DOC_ID | 62 | ORD_CLI_TOT.DOC_ID | 2 | 100.00 | Using where |
| 1 | SIMPLE | ART_PESO | eq_ref | PRIMARY | PRIMARY | 92 | ORD_CLI_RIGHE.COD_ART | 1 | 100.00 | |
| 1 | SIMPLE | ORD_CLI_RIGHE_SPEC | eq_ref | PRIMARY,ORD_CLI_RIGHE_SPEC_OFF_RIGA_ID | PRIMARY | 92 | ORD_CLI_RIGHE.DOC_RIGA_ID | 1 | 100.00 | Using where |
| 1 | SIMPLE | OFF_CLI_RIGHE | ref | DOC_RIGA_ID | DOC_RIGA_ID | 92 | ORD_CLI_RIGHE_SPEC.OFF_RIGA_ID | 1 | 100.00 | Using where |
| 1 | SIMPLE | OFF_CLI | ref | DOC_ID | DOC_ID | 63 | OFF_CLI_RIGHE.DOC_ID | 1 | 100.00 | |
| 1 | SIMPLE | FATT_CLI_RIGHE_SPEC | ref | FATT_CLI_RIGHE_SPEC_ORD_RIGA_ID | FATT_CLI_RIGHE_SPEC_ORD_RIGA_ID | 93 | ORD_CLI_RIGHE.DOC_RIGA_ID | 1 | 100.00 | Using index |
| 1 | SIMPLE | FATT_CLI_RIGHE | eq_ref | PRIMARY | PRIMARY | 92 | FATT_CLI_RIGHE_SPEC.DOC_RIGA_ID | 1 | 100.00 | |
| 1 | SIMPLE | FATT_CLI_TOT | eq_ref | PRIMARY | PRIMARY | 62 | FATT_CLI_RIGHE.DOC_ID | 1 | 100.00 | |
| 1 | SIMPLE | FATT_CLI_RIGHE_PROVV | ref | FATT_CLI_RIGHE_PROVV_DOC_RIGA_ID | FATT_CLI_RIGHE_PROVV_DOC_RIGA_ID | 92 | FATT_CLI_RIGHE_SPEC.DOC_RIGA_ID | 1 | 100.00 | |
| 1 | SIMPLE | FATT_CLI_RIGHE_LOTTI | ref | FATT_CLI_RIGHE_LOTTI_DOC_RIGA_ID | FATT_CLI_RIGHE_LOTTI_DOC_RIGA_ID | 92 | FATT_CLI_RIGHE_SPEC.DOC_RIGA_ID | 1 | 100.00 | |
| 1 | SIMPLE | DDT_FOR_RIGHE_LOTTI | ref | DDT_FOR_RIGHE_LOTTI_COD_LOT | DDT_FOR_RIGHE_LOTTI_COD_LOT | 92 | FATT_CLI_RIGHE_LOTTI.COD_LOT | 1 | 100.00 | |
| 1 | SIMPLE | DDT_FOR_RIGHE | eq_ref | PRIMARY | PRIMARY | 92 | DDT_FOR_RIGHE_LOTTI.DOC_RIGA_ID | 1 | 100.00 | |
| 1 | SIMPLE | FATT_FOR_RIGHE | eq_ref | PRIMARY | PRIMARY | 92 | FATT_CLI_RIGHE_LOTTI.COD_LOT | 1 | 100.00 | |
+----+-------------+----------------------+--------+-----------------------------------------------------------------------------+----------------------------------+---------+--------------------------------------------+------+----------+----------------------------------------------+
以下是查询执行后show status like 'Handler%'的结果
Handler_commit, 2
Handler_delete, 0
Handler_discover, 0
Handler_prepare, 0
Handler_read_first, 0
Handler_read_key, 421001
Handler_read_last, 0
Handler_read_next, 240344
Handler_read_prev, 0
Handler_read_rnd, 30
Handler_read_rnd_next, 2412
Handler_rollback, 0
Handler_savepoint, 0
Handler_savepoint_rollback, 0
Handler_update, 31846
Handler_write, 2409
数据库结构：https://gist.github.com/moiseevigor/4988fc8868f92643c9fb
编辑1
创建索引后
ALTER TABLE `TCross5_NP`.`ORD_CLI`
ADD INDEX `ORD_CLI_MULTI` (`COD_BUSN_UN` ASC, `DATA_DOC` ASC, `DOC_ID` ASC) ;
执行时间下降了2次，但仍然达到了ORD_CLI_MULTI索引
答案 0 :(得分：1)
首先，（并且在许多其他类似的查询中，您似乎处理了大量“查找”辅助表引用），将查询的开头更改为
SELECT STRAIGHT_JOIN
指示引擎以您列出的确切顺序运行查询。这将阻止它尝试使用查找表作为主要考虑因素，并尝试使用后备词或端到端来获取数据。有时效果很好，其他时候（很少根据我的经验）会妨碍表现。
接下来，由于您正在寻找“AND OFF_CLI_RIGHE.DOC_RIGA_ID IS NOT NULL”，我会在加入时将您的LEFT JOIN更改为INNER JOIN。
INNER JOIN ORD_CLI_RIGHE_SPEC
ON ORD_CLI_RIGHE.DOC_RIGA_ID = ORD_CLI_RIGHE_SPEC.DOC_RIGA_ID
INNER JOIN OFF_CLI_RIGHE
ON ORD_CLI_RIGHE_SPEC.OFF_RIGA_ID = OFF_CLI_RIGHE.DOC_RIGA_ID
因此消除了WHERE子句中的“AND ...不为空”。
最后，我会有一个可以优化的多个部分的索引 对于查询...
CREATE index MultipleParts on ORD_CLI ( COD_BUSN_UN, DATA_DOC, DOC_ID );
多部分索引将帮助查询的WHERE，GROUP BY和ORDER BY。