| --- |
| { |
| "title": "MERGE", |
| "language": "en" |
| } |
| --- |
| |
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| |
| ## MERGE |
| |
| ### description |
| #### Syntax |
| |
| `AGGREGATE_FUNCTION_MERGE(agg_state)` |
| The aggregated intermediate results are aggregated and calculated to obtain the actual result. |
| The type of the result is consistent with `AGGREGATE_FUNCTION`. |
| |
| ### example |
| ``` |
| mysql [test]>select avg_merge(avg_state(1)) from d_table; |
| +-------------------------+ |
| | avg_merge(avg_state(1)) | |
| +-------------------------+ |
| | 1 | |
| +-------------------------+ |
| ``` |
| ### keywords |
| AGG_STATE, MERGE |
