greatest-n-per-group
SQL- Query to fetch the row having a maximum date below a certain date
Sorry I couldn\'t explain this better in the title. Here is essentially what I need to accomplish: Entity table: entity_id[详细]
2023-03-22 12:51 分类:问答MySQL query already GROUPed and ORDERed : how to ORDER inside the GROUPs?
I have this quer开发者_StackOverflowy: SELECT id_user, COUNT(*) as count FROM posts GROUP BY id_user ORDER BY COUNT(*) DESC[详细]
2023-03-21 06:44 分类:问答Get the whole ROW which has the MAX value for a column with join
I have exhausted my wit with this problem, so I bring the challenge to you: --CREATING DATA: DECLARE @CONTACTS TABLE (ID INT, NickName CHAR(10))[详细]
2023-03-20 04:51 分类:问答Group by in DB2
I have a query to fetch the nearest future doctor appointment for the users in DB2. SELECT user_id, appointment_id,[详细]
2023-03-19 17:08 分类:问答Finding the highest n values of each group in MySQL
I have some data formatted like this: LaneSeries 1680 1685 1688 2666 2425 2775 ... And I\'d like to grab the highest n series per lane (let\'s say 2 for the sake of this example, but it could be ma[详细]
2023-03-16 19:42 分类:问答mysql order by timestamp latest and group the rows of that category with limit
Order 开发者_如何学编程by timestamp DESC and group by a category with a limit in Mysql cattimestamp[详细]
2023-03-14 21:06 分类:问答SQL return transaction table with the date of previous payment
I have a query in Access that returns transactions for all开发者_如何学编程 customers the fields are[详细]
2023-03-14 04:54 分类:问答MySQL & PHP - Select 6 rows, each with a different 'WHERE' clause
I\'m pretty good with MySQL, but this is something I have never done. What I want to do is make an SQL code to select 6 rows, each with their own WHERE clause.[详细]
2023-03-14 02:03 分类:问答Mysql - Need to get latest of table A when referenced from table B
I\'m building a bug tracker type tool for kicks. I\'m having probs with a small prob relating to version control of my data.[详细]
2023-03-14 00:24 分类:问答Sql Query to get the record what has the max id number for each type
I have a table in sql server.It has a pid field used as a primary key and a field called deviceid that has a device name. example:[详细]
2023-03-12 12:09 分类:问答