Question

我正在使用此查询创建我的mysql数据库表的CSV

  $path = getcwd() . '/uploads/data.csv' ;

   $sql = "select email,username from `engine4_user` LIMIT 5000 into outfile '$path' FIELDS TERMINATED BY ','  LINES TERMINATED BY '\n' ";

但是现在我需要一个额外的字段，它是配置文件url。它不存在于表中。所以我想使用该用户表的ID创建一个虚拟URL列。像https://mysiteurl/profile/ $ user_id。

请帮忙。提前谢谢。

Answer 1

使用“CONCAT”运算符

$sql = "SELECT
        email,
        username, 
        CONCAT('https://mysiteurl/profile/',user_id) as profile_url 
        FROM `engine4_user` 
        LIMIT 5000 
        into outfile '$path' FIELDS TERMINATED BY ','  LINES TERMINATED BY '\n' ";

See example here

使用＆＃39;到outfile＆＃39;时如何在db表中添加自定义列询问

1 个答案: