SQL SELECT INTO OUTFILE 未按预期工作。

Question

我被一个从bash脚本中运行的SQL查询所困扰。

下面的工作和输出的文件符合预期，但有一些字段包含逗号，我希望这些字段被包含，但逗号被转义。

FILE="/var/lib/mysql-files/UMHP/ConditionAssessment.csv"
mysql --user='root' --password='xxxxxxxxxxxxxxx' UMHPSurvey << EOFMYSQL

SELECT 
DateEntry AS 'Entry Date',
FirstName AS 'First Name',
LastName As 'Last Name',
member_id as 'Member ID',
mobile AS 'Mobile',
Doctor AS 'Need help getting connected to a doctor',
CASE WHEN HealthConditions LIKE '%Asthma%' THEN 'Yes' ELSE 'No' END AS 'Asthma',
CASE WHEN HealthConditions LIKE '%COPD%' THEN 'Yes' ELSE 'No' END AS 'COPD',
CASE WHEN HealthConditions LIKE '%Cancer' THEN 'Yes' ELSE 'No' END AS 'Cancer',
CASE WHEN HealthConditions LIKE '%CHF%' THEN 'Yes' ELSE 'No' END AS 'CHF',
CASE WHEN HealthConditions LIKE '%Diabetes%' THEN 'Yes' ELSE 'No' END AS 'Diabetes',
CASE WHEN HealthConditions LIKE '%Hypertension (High Blood Pressure)%' THEN 'Yes' ELSE 'No' END AS 'Hypertension (High Blood Pressure)',
AdditionalConditionsDescription AS 'Additional Health Conditions',
MedicationQuestions AS 'Questions about meds',
InsuranceQuestionsDescription AS 'Healthcare concerns'
FROM UMHPSurvey.Assessment
where Doctor = 'Yes' or ConditionQuestions = 'Yes' or AdditionalConditions = 'Yes'
or MedicationQuestions = 'Yes' or Concerns = 'Yes'
INTO OUTFILE '$FILE' FIELDS TERMINATED BY ','
LINES TERMINATED BY '\n'
EOFMYSQL

下面的代码不能正常工作

FILE="/var/lib/mysql-files/ConditionAssessment.csv"
mysql --user='root' --password='xxxxxxxxxxxxxxx' UMHPSurvey << EOFMYSQL

SELECT 
DateEntry AS 'Entry Date',
FirstName AS 'First Name',
LastName As 'Last Name',
member_id as 'Member ID',
mobile AS 'Mobile',
Doctor AS 'Need help getting connected to a doctor',
CASE WHEN HealthConditions LIKE '%Asthma%' THEN 'Yes' ELSE 'No' END AS 'Asthma',
CASE WHEN HealthConditions LIKE '%COPD%' THEN 'Yes' ELSE 'No' END AS 'COPD',
CASE WHEN HealthConditions LIKE '%Cancer' THEN 'Yes' ELSE 'No' END AS 'Cancer',
CASE WHEN HealthConditions LIKE '%CHF%' THEN 'Yes' ELSE 'No' END AS 'CHF',
CASE WHEN HealthConditions LIKE '%Diabetes%' THEN 'Yes' ELSE 'No' END AS 'Diabetes',
CASE WHEN HealthConditions LIKE '%Hypertension (High Blood Pressure)%' THEN 'Yes' ELSE 'No' END AS 'Hypertension (High Blood Pressure)',
AdditionalConditionsDescription AS 'Additional Health Conditions',
MedicationQuestions AS 'Questions about meds',
InsuranceQuestionsDescription AS 'Healthcare concerns'
FROM UMHPSurvey.Assessment
where Doctor = 'Yes' or ConditionQuestions = 'Yes' or AdditionalConditions = 'Yes'
or MedicationQuestions = 'Yes' or Concerns = 'Yes'
INTO OUTFILE '$FILE' 
FIELDS ESCAPED BY '\\' 
OPTIONALLY ENCLOSED BY '\"' 
FIELDS TERMINATED BY ',' 
LINES TERMINATED BY '\n'
EOFMYSQL

给出以下错误

mysql: [Warning] Using a password on the command line interface can be insecure.
ERROR at line 2: Unknown command '\"'.

我不知道自己做错了什么。

我也试过以下方法

FILE="/var/lib/mysql-files/ConditionAssessment.csv"
mysql --user='root' --password='xxxxxxxxxxxxxxx' UMHPSurvey << EOFMYSQL

SELECT 
DateEntry AS 'Entry Date',
FirstName AS 'First Name',
LastName As 'Last Name',
member_id as 'Member ID',
mobile AS 'Mobile',
Doctor AS 'Need help getting connected to a doctor',
CASE WHEN HealthConditions LIKE '%Asthma%' THEN 'Yes' ELSE 'No' END AS 'Asthma',
CASE WHEN HealthConditions LIKE '%COPD%' THEN 'Yes' ELSE 'No' END AS 'COPD',
CASE WHEN HealthConditions LIKE '%Cancer' THEN 'Yes' ELSE 'No' END AS 'Cancer',
CASE WHEN HealthConditions LIKE '%CHF%' THEN 'Yes' ELSE 'No' END AS 'CHF',
CASE WHEN HealthConditions LIKE '%Diabetes%' THEN 'Yes' ELSE 'No' END AS 'Diabetes',
CASE WHEN HealthConditions LIKE '%Hypertension (High Blood Pressure)%' THEN 'Yes' ELSE 'No' END AS 'Hypertension (High Blood Pressure)',
AdditionalConditionsDescription AS 'Additional Health Conditions',
MedicationQuestions AS 'Questions about meds',
InsuranceQuestionsDescription AS 'Healthcare concerns'
INTO OUTFILE '$FILE' 
FIELDS ESCAPED BY '\\' 
OPTIONALLY ENCLOSED BY '\"' 
FIELDS TERMINATED BY ',' 
LINES TERMINATED BY '\n'
FROM UMHPSurvey.Assessment
where Doctor = 'Yes' or ConditionQuestions = 'Yes' or AdditionalConditions = 'Yes'
or MedicationQuestions = 'Yes' or Concerns = 'Yes'
EOFMYSQL

给出同样的错误（如下

mysql: [Warning] Using a password on the command line interface can be insecure.
ERROR at line 2: Unknown command '\"'.

谁能帮我理解我哪里出错了？

Answer 1

因为你使用参数扩展来代替 $FILE，在 "here document "里面也会有反斜杠引号。shell发送给MySQL的内容是这样的。

FIELDS ESCAPED BY '\'

试着把反斜杠双括号括起来。

FIELDS ESCAPED BY '\\\\'

你的其他反斜杠的使用是不受影响的，这让人很困惑，读一下吧。指南的一部分 仔细.要调试这里的文档，用cat替换你对mysql的调用。

cat - << EOFMYSQL