在命令参数中转义双引号

Question

I need to run a PS command on SQL Server. Running a simple command without double-quotes works without a problem.

How to run below command?

DECLARE @sql nvarchar(4000);
 SET @sql = 
 '
 powershell.exe -command "
 $messageBody = "ds"
 Write-Host $messageBody
 "';
EXEC xp_cmdshell @sql;

I tried this ` and backslash but nothing seems to be working.

Running it from ps1 file is not an option.

Answer 1

Instead of "ds" , use ''ds'' to use single quotes withing the ps script to enclose the literal. Furthermore, use the call operator (&) withing the command parameter to call the script block:

SET @sql = 'powershell.exe -command "& { $messageBody = ''ds''; Write-Host $messageBody }';