Code comments

Use the following notation to include comments in CQL code:

For a single line or end of a line, place a double hyphen (--) before the text to comment out the rest of the line:
```
SELECT * FROM cycling.race_winners; -- End of line comment
```
For a single line or end of a line, place a double forward slash (//) before the text to comment out the rest of the line:
```
SELECT * FROM cycling.race_winners; // End of line comment
```
For a block of comments, put a forward slash asterisk (/) at the beginning of the comment and then asterisk forward slash (/) at the end.
```
SELECT * FROM cycling.race_winners; 
/* This is a 
   comment that spans multiple
   lines */
```

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