group-by

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SQL GROUP BY CASE

I am trying to get the age of visitor from three tables: Visits that holds the viist date by client ID, and[详细]

2023-04-02 04:25 分类：问答
MySQL Many-to-Many Relationship Select Conditions

I have two tables books and tags which are in a many-to-many relationship via the table books_tags. What I want to do is select all books that have one or more tag(s) like \'%tag%\'. No problem. Howev[详细]

2023-04-02 01:56 分类：问答
MySQL AVG(TIMESTAMPDIFF) with GROUP BY

I have two tables user (one) and transaction (many) and I need to get the average time in days from when a user was created to when they made their first transaction. I\'m using AVG(TIMESTAMPDIFF) whi[详细]

2023-04-01 15:52 分类：问答
How to make a group by statement (from MySQL) in Stata?

I am not a statistics guy but have to deal with quite some data. In most cases these data sets come from an online survey; hence I do have a MySQL database and know how to get some results out of that[详细]

2023-04-01 08:15 分类：问答
Grouping cities, states and countries in MYSQL PHP

I am new to PHP and have visited several sites for this but can\'t seem to understand thoroughly. I have this query:[详细]

2023-04-01 07:32 分类：问答
MySQL multiple left join group by

There is something wrong with this MySQL code. it seems to be returning more stock then there should be.[详细]

2023-04-01 05:53 分类：问答
total count each day sorted, result grouped by week

My query looks like this right now pretty straightforward: select count(*), date(visit_date), DATE_FORMAT(visit_date,\"%a\")[详细]

2023-04-01 05:08 分类：问答
MySQL Select Group By and Order By

Here is the SQL Statement that I am using.. $sql = \"SELECT surname, forename, count(*) FROM people WHERE user_id=\'$user_id\'[详细]

2023-04-01 04:15 分类：问答
SELECT * FROM people WHERE user_id='$user_id' ORDER BY time GROUP BY surname [closed]

It's difficult to tell what is being as开发者_高级运维ked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical andcannot be reasonably answered in its current form.[详细]

2023-04-01 04:00 分类：问答
C# object sorting by group, using linq

I have a list of objects which are grouped by a particular property.I need to sort this list based on other properties, but it always needs to r开发者_StackOverflow社区etain the grouping.So for exampl[详细]

2023-04-01 01:51 分类：问答