postgresql - removing commas in postgresql query

Question

I have a query:

SELECT phone, 
       to_char(appt_date,'MM/DD/YYYY'), 
       time_text, 
       staff_email || subject_line as title,
       staff_wav,
       agency_wav 
FROM phone_dialer

that is sent to a csv file

That results in

9105554444,07/01/2011,08:30am,me@myemail.orgGADK082493,staffid0827,Coastal Counseling

or

9105554444,07/01/2011,08:30am,me@myemail.orgGADK082493,staffid0827,Smith, Bob

The "agency_wav" column could have a name of company. I have tried several ways to remove the comma between Smith, Bob and am failing miserably.

Can anyone steer me to a resolution?

Answer 1

回答标题，因为问题的主体不清楚。

从字符串中删除逗号的最快方法：

SELECT translate('Smith, Bob, foo,,,bar', ',','')

相关答案寻址translate()/replace()：

• 查找包含减号的电话号码，例如“123-456789”

Answer 2

创建 CSV 的首选方法是使用 COPY 命令。

如果由于某种原因您不想要或不能使用它，您只需在 CSV 友好列中返回值，该列将值括在双引号中，并通过在字符串中复制现有的双引号来转义它们。这将保留正确的值（即所有逗号），但不会破坏 CSV 格式。

SELECT phone, 
       to_char(appt_date,'MM/DD/YYYY'), 
       time_text, 
       staff_email || subject_line as title,
       staff_wav,
       '"' || replace(agency_wav, '"', '""') || '"'
FROM phone_dialer

这将产生以下行

9105554444,07/01/2011,08:30am,me@myemail.orgGADK082493,staffid0827,"Smith, Bob"

注意带逗号的引用值。

Answer 3

如果您使用语法 COPY () TO STDOUT WITH CSV 包围您的查询；然后它将构造 CSV 输出并自动引用包含逗号的字段值。

如果您想在查询中手动执行此操作，请尝试 replace(agency_wav,',','')。