greatest-n-per-group
SQL select only rows with max value on a column [duplicate]
Want to improve this post? Provide detailed answers to this question, including citations and an explanation of why your answer is correct. Answers without enough detail may be edited or deleted.[详细]
2023-04-12 09:48 分类：问答Easy SQL Plus Query (group by)
I\'m trying to query my database in the following fashion: Find the name, major and age of the youngest student who is either a Math major or is enrolled in a course taught by a professor that belong[详细]
2023-04-12 08:37 分类：问答Newest loan per user for all users
// Edit: All work fin开发者_开发问答e with: SELECT u.*, l.cod AS loans_cod, l.step AS loans_step FROM users AS u[详细]
2023-04-12 01:58 分类：问答How do I use max() in sql
I have a table that looks like this: col1col2col3 ------ ----- ----- A1trout A2trout B1bass C1carp C2tuna D1salmon[详细]
2023-04-10 10:00 分类：问答Selecting Greatest N records in X groups
So I\'ve been running through all the questions under the greatest-n-per-group tag, and either I don\'t understand what I\'m reading, or nothing has fit my needs so far.This link has alsoprovided a lo[详细]
2023-04-10 02:28 分类：问答SQL return max value from child for each parent row
I have 2 tables - 1 with parent records, 1 with child records.For each parent record, I\'m trying to return a single child record with the MAX(SalesPriceEach).[详细]
2023-04-09 23:51 分类：问答How to do SQL join effectively?
I have two tables. Order Replication. A single order record can have multiple Replication records. I want to join these two tables, such that i always retrieve a single record out of the join even[详细]
2023-04-08 11:02 分类：问答MySQL Left Join + Min
Seemingly simple MySQL question, but I\'ve never had to do this before.. I have two tables, items and prices, with a one-to-many relationship.[详细]
2023-04-08 05:01 分类：问答How do I select TOP 5 PERCENT from each group?
I have a sample table like this: CREATE TABLE #TEMP(Category VARCHAR(100), Name VARCHAR(100)) INSERT INTO #TEMP VALUES(\'A\', \'John\')[详细]
2023-04-07 23:44 分类：问答SQL - Select 'n' greatest elements in group
The SQL MAX aggregate function will allow you to select the开发者_运维知识库 top element in a group. Is there a way to select the top n elements for each group?[详细]
2023-04-07 11:00 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
加载中,请稍侯......