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技术 2022年11月14日
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背景:

库里面有张表,日增数据量百万条;

之前查询:

SELECT*FROM`res_battery_data_history`LIMIT 1797000,10;

<img src="data:image/png;base64,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" alt="" />

优化方法1:

/*SELECT * FROM `res_battery_data_history` limit 1797000,10;*/SELECT*FROMres_battery_data_historyWHEREid >= (SELECTidFROMres_battery_data_historyLIMIT 1797000,1)LIMIT 10

<img src="data:image/png;base64,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" alt="" />

优化方法2:

SELECT*FROMres_battery_data_history batteryJOIN (SELECTidFROMres_battery_data_historyLIMIT 1797000,10) temp ON battery.id = temp.id

<img src="data:image/png;base64,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" alt="" />

感觉还可以;

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