大约有 44,000 项符合查询结果（耗时：0.0464秒） [XML]
SQL select only rows with max value on a column [duplicate]
...All you need is a GROUP BY clause with the MAX aggregate function:
SELECT id, MAX(rev)
FROM YourTable
GROUP BY id
It's never that simple, is it?
I just noticed you need the content column as well.
This is a very common question in SQL: find the whole data for the row with some max value in a co...
Sample settings.xml for maven
... specified at two levels:
|
| 1. User Level. This settings.xml file provides configuration for a single
| user, and is normally provided in
| ${user.home}/.m2/settings.xml.
|
| NOTE: This location can be overridden with the CLI option:
|
| ...
Big O, how do you calculate/approximate it?
...ing proofs comes into play. Hope this familiarizes you with the basics at least though.
share
|
improve this answer
|
follow
|
...
PDO get the last ID inserted
I have a query, and I want to get the last ID inserted. The field ID is the primary key and auto incrementing.
3 Answers
...
Rails 3: Get Random Record
... on an indexed column (PostgreSQL syntax):
select *
from my_table
where id >= trunc(
random() * (select max(id) from my_table) + 1
)
order by id
limit 1;
share
|
improve this answer
...
Oracle SQL: Update a table with data from another table
...c
FROM table2 t2
WHERE t1.id = t2.id)
WHERE EXISTS (
SELECT 1
FROM table2 t2
WHERE t1.id = t2.id )
Assuming the join results in a key-preserved view, you could also
UPDATE (SELECT t1.id,
t1.name name1,
...
How to pass parameters to the DbContext.Database.ExecuteSqlCommand method?
Let's just suppose I have a valid need for directly executing a sql command in Entity Framework. I am having trouble figuring out how to use parameters in my sql statement. The following example (not my real example) doesn't work.
...
Remove duplicates in the list using linq
I have a class Items with properties (Id, Name, Code, Price) .
11 Answers
11
...
How to add ID property to Html.BeginForm() in asp.net mvc?
I want to validate my form using jquery but it doesn't have an ID property as of now how to add it to the form in asp.net mvc? I am using this...
...
How to get the currently logged in user's user id in Django?
How to get the currently logged-in user's id?
4 Answers
4
...