pgsql中over函数的应用 -- sum() over(partition by ... order by ...) SELECT len/sum(len)over(partition by road_id) param from rs; -- min() over(partition by ... order by ...) SELECT min(len)over(partition by road_id) param from rs; -- max() over(partition by ... order ...
【数据库】pgsql窗口函数,分组求sum的方式 select distinct quantity, standard_cost, sum(a.quantity*a.standard_cost) over(partition by purchase_scence_code,raw_material_code) amount, coalesce(purchase_scence_code,'unknown') as purchase_scence_code, coalesce(raw_material_code,'unknown') as raw_mate...
sum(a.quantity*a.standard_cost) over(partition by purchase_scence_code,raw_material_code) amount, coalesce(purchase_scence_code,'unknown') as purchase_scence_code, coalesce(raw_material_code,'unknown') as raw_material_code from ap.fact_outbound_order as a where a.material_type_code='3' an...
mydb=> SELECT avg(score) OVER(r),sum(score) OVER(r),* FROM SCORE WINDOW r as (PARTITION BY subject); avg | sum | id | subject | stu_name | score ---+---+---+---+---+--- 73.3333333333333333 | 220 | 1 | Chinese | francs | 70 73.3333333333333333 | 220 | 2 | Chinese ...
SELECTcustomer_id,SUM(total)OVER(PARTITIONBYcustomer_id)ascumulative_totalFROMorders; AI代码助手复制代码 在Laravel 中,你可以使用 DB::select() 方法执行原始查询并获取结果: useIlluminate\Support\Facades\DB; $result = DB::select("SELECT customer_id, SUM(total) OVER (PARTITION BY customer_id) as ...
-- 使用窗口函数进行数据分析 SELECT product_id, SUM(sales) OVER (PARTITION BY product_id ORDER BY sale_date RANGE BETWEEN CURRENT ROW AND '1 month' FOLLOWING) AS monthly_sales FROM sales_data; 推荐几个学习 MySQL 教程文章 01、MySQL 简介 02、MySQL 管理 03、MySQL 创建连接 04、MySQL 获取数据...
现代CPU模型拥有大量的CPU核心。多年来，数据库应用程序都是并发向数据库发送查询的。查询处理多个表的行...
WITH query_name (id) AS (SELECT id FROM table_expression) SELECT DISTINCT ON (col1) random() AS name1 FROM table_expression WHERE name1=name1 GROUP BY id HAVING sum(len) < interval '5 hours' WINDOW w AS (PARTITION BY depname ORDER BY salary DESC) EXCEPT (SELECT * FROM others) OR...
SUM(salary) OVER (ORDER BY id ROWS BETWEEN 2 PRECEDING AND 2 FOLLOWING) 1. 这会计算当前行及之前2行和之后2行的salary总和。 OVER()可搭配的函数: 聚合函数 MAX(),MIN(),COUNT(),SUM()等,用于生成每个分区的聚合结果。 排序相关 ROW_NUMBER(),RANK(),DENSE_RANK()等,用于生成每个分区的行号或排名...