how to add comments in sql code example

Example 1: comment in sql

/* Comment */

Example 2: sql comments

Single line comments start with –- Any text after these 2 characters to the end of the line will be
ignored.
Multiline comments start with /* and end with */. They stretch across multiple lines until the
closing characters have been found.
-- My Select query
/*
This is my select query.
It grabs all rows of data from the users table
*/