Underscores in SQL queries often sneak into ๐๐ข๐ filenames or database field names, making them easier to read when scanning code. Use ๐ข๐๐๏ธ combos when organizing tables or sorting through datasets, while ๐๏ธ๐๐ fits reporting or data analysis contexts. For debugging or linking data, ๐งฉ๐๐๐ captures the process. These are handy for dev notes, code reviews, or quick references in tech chats.