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| ColA | ColB | diff |
|---|---|---|
| John, Sally | John, Sally, Cindy, Steve | Cindy, Steve |
| ColA | ColB | diff |
|---|---|---|
| John, Sally | John, Sally, Cindy, Steve | Cindy, Steve |
| ColA | ColB | diff |
|---|---|---|
| John, Sally | John, Sally, Cindy, Steve | Cindy, Steve |
| ColA | ColB | diff |
|---|---|---|
| John, Sally | John, Sally, Cindy, Steve | Cindy, Steve |