如何解决为什么我将所有值都视为 NULL?
这是我在 MySQL 中运行的代码
LOAD DATA INFILE 'C:/ProgramData/MySQL/MySQL Server 8.0/Uploads/coviddeaths.csv' INTO TABLE coviddeaths
FIELDS TERMINATED BY ','
LINES TERMINATED BY '\r\n'
IGNORE 1 LINES
(
iso_code,continent,location,@date,@population,@total_cases,@new_cases,@new_cases_smoothed,@total_deaths,@new_deaths,@new_deaths_smoothed,@total_cases_per_million,@new_cases_per_million,@new_cases_smoothed_per_million,@total_deaths_per_million,@new_deaths_per_million,@new_deaths_smoothed_per_million,@reproduction_rate,@icu_patients,@icu_patients_per_million,@hosp_patients,@hosp_patients_per_million,@weekly_icu_admissions,@weekly_icu_admissions_per_million,@weekly_hosp_admissions,@weekly_hosp_admissions_per_million
)
SET
iso_code=NULLIF(iso_code,''),continent=NULLIF(continent,location=NULLIF(location,date=NULLIF(@date,population=NULLIF(@population,total_cases=NULLIF(@total_cases,new_cases=NULLIF(@new_cases,new_cases_smoothed=NULLIF(@new_cases_smoothed,total_deaths=NULLIF(@total_deaths,new_deaths=NULLIF(@new_deaths,new_deaths_smoothed=NULLIF(@new_deaths_smoothed,total_cases_per_million=NULLIF(@total_cases_per_million,new_cases_per_million=NULLIF(@new_cases_per_million,new_cases_smoothed_per_million=NULLIF(new_cases_smoothed_per_million,total_deaths_per_million=NULLIF(@total_deaths_per_million,new_deaths_per_million=NULLIF(@new_deaths_per_million,new_deaths_smoothed_per_million=NULLIF(@new_deaths_smoothed_per_million,reproduction_rate=NULLIF(@reproduction_rate,icu_patients=NULLIF(@icu_patients,icu_patients_per_million=NULLIF(@icu_patients_per_million,hosp_patients=NULLIF(@hosp_patients,hosp_patients_per_million=NULLIF(@hosp_patients_per_million,weekly_icu_admissions=NULLIF(@weekly_icu_admissions,weekly_icu_admissions_per_million=NULLIF(@weekly_icu_admissions_per_million,weekly_hosp_admissions=NULLIF(@weekly_hosp_admissions,weekly_hosp_admissions_per_million=NULLIF(@weekly_hosp_admissions_per_million,'');
运行此程序后,我在所有行中看到 Null 值。重新检查csv文件中的数据,原始值在那里。
我正在尝试从“分析师亚历克斯”YouTube 页面进行数据分析项目。数据取自 here .
我做错了什么?请帮忙!
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