Overview of the SQLCMD utility in SQL Server

SQL Commands Cheat Sheet - Learn SQL Commands in One Go

Using SQL Server sqlcmd scripting variables

How to use SQLCMD commands in the SSMS query editor - SQL Shack

Working with PowerShell’s Invoke-SqlCmd

Execute SQL Server Script Files with the sqlcmd Utility

SQL Variable Examples in Stored Procedures, Functions, Scripts, SQLCMD