尝试导入SQL备份文件时持续报错，请求技术支持

Hey there, let's break down why your psql import command is failing and fix it right away.

The Root Cause #

You're on Windows, and the problem comes down to backslashes (\) in your file path. In psql, backslashes act as escape characters for special commands (like \c to switch databases). When you run:

psql todolist < C:\Users\ojadi\Documents\todolist2.sql

psql sees \Users right after C: and tries to interpret it as a psql command—which doesn't exist, hence the "invalid command \Users" error.

Quick Fixes to Try #

Here are 3 reliable ways to resolve this:

• Use forward slashes instead of backslashes
  This is the simplest fix. Just replace every \ with / in your file path:

  psql todolist < C:/Users/ojadi/Documents/todolist2.sql
  

• Wrap the path in quotes with double backslashes (for Command Prompt)
  In Windows CMD, double backslashes tell the shell to treat them as a single literal backslash. Pair this with quotes to avoid issues if your path has spaces (this is mandatory for space-containing paths):

  psql todolist < "C:\\Users\\ojadi\\Documents\\todolist2.sql"
  

• Use single quotes (for PowerShell)
  If you're using PowerShell instead of CMD, single quotes will preserve the literal path without needing to escape backslashes:

  psql todolist < 'C:\Users\ojadi\Documents\todolist2.sql'
  

Extra Tip: Ensure psql is in Your PATH #

If you get a "psql is not recognized" error after trying the above, you might need to use the full path to the psql executable. For example, if you have PostgreSQL 15 installed:

"C:\Program Files\PostgreSQL\15\bin\psql.exe" todolist < C:/Users/ojadi/Documents/todolist2.sql

Just adjust the version number and installation path to match your setup.

Once you run the corrected command, your SQL backup should import without that annoying error.

内容的提问来源于stack exchange，提问作者coderoftheday