| --- |
| { |
| "title": "AVG_WEIGHTED", |
| "language": "en" |
| } |
| --- |
| |
| <!-- |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| --> |
| |
| |
| ## AVG_WEIGHTED |
| ### Description |
| #### Syntax |
| |
| ` double avg_weighted(x, weight)` |
| |
| Calculate the weighted arithmetic mean, which is the sum of the products of all corresponding values and weights, divided the total weight sum. |
| If the sum of all weights equals 0, NaN will be returned. |
| |
| ### example |
| |
| ``` |
| mysql> select avg_weighted(k2,k1) from baseall; |
| +--------------------------+ |
| | avg_weighted(`k2`, `k1`) | |
| +--------------------------+ |
| | 495.675 | |
| +--------------------------+ |
| 1 row in set (0.02 sec) |
| |
| ``` |
| ### keywords |
| |
| AVG_WEIGHTED |
