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Retrieving the last record in each group - MySQL
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Here's the DDL for my Posts table:
CREATE TABLE `posts` (
`PostId` bigint(20) unsigned NOT NULL auto_increment,
`PostTypeId` bigint(20) unsigned NOT NULL,
`AcceptedAnswerId` bigint(20) unsigned default NULL,
`ParentId` bigint(20) unsigned default NULL,
`CreationDate` datetime NOT NULL,
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Get Month name from month number
...ed Month Names : "Aug"
DateTimeFormatInfo.GetAbbreviatedMonthName Method (Int32)
Returns the culture-specific abbreviated name of the specified month
based on the culture associated with the current DateTimeFormatInfo
object.
string monthName = CultureInfo.CurrentCulture.DateTimeFormat.Ge...
Handling InterruptedException in Java
What is the difference between the following ways of handling InterruptedException ? What is the best way to do it?
7 Answ...
private[this] vs private
...rything (make it private) and open (provide accessors) if necessary. Scala introduces even more strict access modifier. Should I always use it by default? Or should I use it only in some specific cases where I need to explicitly restrict changing field value even for objects of the same class? In ot...
Why is f(i = -1, i = -1) undefined behavior?
...s nothing to say that the instructions performing the assignment cannot be interleaved. It might be optimal to do so, depending on CPU architecture. The referenced page states this:
If A is not sequenced before B and B is not sequenced before A, then
two possibilities exist:
evaluatio...
How to do a FULL OUTER JOIN in MySQL?
... syntax. According to MySql's outer join simplification, the right join is converted to the equivalent left join by switching the t1 and t2 in the FROM and ON clause in the query. Thus, the MySql Query Optimizer translates the original query into the following -
SELECT * FROM t1
LEFT JOIN t2 ON t1...
Can I return the 'id' field after a LINQ insert?
When I enter an object into the DB with Linq-to-SQL can I get the id that I just inserted without making another db call? I am assuming this is pretty easy, I just don't know how.
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What is the significance of 1/1/1753 in SQL Server?
...se the Gregorian Calendar.
So with the greater range of datetime2
SELECT CONVERT(VARCHAR, DATEADD(DAY,-5,CAST('1752-09-13' AS DATETIME2)),100)
Returns
Sep 8 1752 12:00AM
One final point with the datetime2 data type is that it uses the proleptic Gregorian calendar projected backwards to well ...
C#/Linq: Apply a mapping function to each element in an IEnumerable?
I've been looking for a way to transform each element of an IEnumerable into something else using a mapping function (in a Linq-compatible way) but I haven't found anything.
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Is the != check thread safe?
...e following execution scenario:
The program is loaded and the JVM starts interpreting the bytecodes. Since (as we have seen from the javap output) the bytecode does two loads, you (apparently) see the results of the race condition, occasionally.
After a time, the code is compiled by the JIT compi...