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| COUNT | ConcateColumn |
|---|---|
| 2 | a* b |
| 0 | null |
| 1 | a |
| 3 | b* c* d |
| 0 | null |
Warning: Null value is eliminated by an aggregate or other SET operation.
| COUNT | ConcateColumn |
|---|---|
| 2 | a* b |
| 0 | null |
| 1 | a |
| 3 | b* c* d |
| 0 | null |
Warning: Null value is eliminated by an aggregate or other SET operation.