Question

如何仅将mysql中的选定文件导出为.csv文件

示例：

Select * from tablename where column name = $somevalue

如何从该查询中导出返回的值？

Answer 1

使用into outfile（文档here）：

select *
into outfile 'the/file/you/want.csv'
from tablename
where column = $somevalue

哦，要添加列名，您需要使用union all。 Yuch，因为这可能要求您明确地将某些列强制转换为正确的格式。

select <all columns except "isheader">
into outfile 'the/file/you/want.csv'
from ((select 1 as isheader, <list of column names in quotes>
      ) union all
      (select 0 as isheader, t.*
       from tablename
       where column = $somevalue
      )
     ) t
order by isheader desc

例如，如果您有一个名为id的列：

select id
into outfile 'the/file/you/want.csv'
from ((select 1 as isheader, 'id' as id
      ) union all
      (select 0 as isheader, t.id
       from tablename t
       where column = $somevalue
      )
     ) t
order by isheader desc

如何只将mysql中的选定文件导出到.csv

1 个答案: