group-by

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lucene group by

hi have index simple document where you 开发者_开发知识库have 2 fields: 1. profileId as long 2. profileAttribute as long.[详细]

2023-04-03 10:57 分类：问答
group by a field, but if empty group by another field

I have a table that has a column called tableNum and another column called deviceNum I would like to group by tableNum, but if tableNum is empty then I would need to group by deviceNum.[详细]

2023-04-03 06:25 分类：问答
MySQL - using GROUP BY and DESC

In my SQL query I am selecting开发者_如何学JAVA data with GROUP BY and ORDER BY clauses. The table has the same numbers across multiple rows with different times in each row. So I think I want to appl[详细]

2023-04-03 04:49 分类：问答
Creating a group of users in PHP and MySQL

I\'m wonderin开发者_JAVA百科g how I can use JOIN or LEFT JOIN to group users. users table: id (primary)[详细]

2023-04-03 04:20 分类：问答
MySQL - Joining two tables with datetime columns on Date and three most recent entries before that date

I have two tables in my SQL For example Table1 - ItemPrice: DATETIME|ITEM | PRICE 2011-08-28 |ABC123 2011-09-01 |ABC125[详细]

2023-04-03 01:28 分类：问答
Grouping by values in an array

I have a set of records with the following structure: {u\'_id\': ObjectId(\'4e60fc677fdfb50fc3000000\'),[详细]

2023-04-02 20:23 分类：问答
Combining two Time Interval queries

I have a table called Call_Data and the data looks like: Arr_DateIntervalHan_TimeSL_Time 2011-03-16 18:39:31.00018301200245[详细]

2023-04-02 17:45 分类：问答
Mysql limit rows per group weird results

I wanted to get the latest 4 dates for each symbolid. I adapted the code here as follows: set @num := 0, @symbolid := \'\';[详细]

2023-04-02 06:01 分类：问答
LINQ with groupby and count

This is pretty simple but I\'m at a loss: Given this type of data set: UserInfo(name, metric, day, other_metric)[详细]

2023-04-02 05:51 分类：问答
Selecting a GROUP BY statement only when a predicate is true on all grouped fields

I have a table like this: ------------- id|A| ------------- |1|2| |1|5| |1|6| |2|6| |2|9| ------------- How can I select all ids that have values of A that don\'t contain certain numbers, like I[详细]

2023-04-02 05:15 分类：问答