Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Unfortunately there isn't a built-in method to do this.</p> <blockquote> <p>PM> Install-Package morelinq</p> </blockquote> <pre><code>var firstBorn = People.MinBy(p =&gt; p.DateOfBirth ?? DateTime.MaxValue); </code></pre> <p>Alternatively, you can use the implementation we've got in <a href="https://github.com/morelinq/MoreLINQ" rel="noreferrer">MoreLINQ</a>, in <a href="https://github.com/morelinq/MoreLINQ/blob/ec4bbd3c7ca61e3a98695aaa2afb23da001ee420/MoreLinq/MinBy.cs" rel="noreferrer">MinBy.cs</a>. (There's a corresponding <code>MaxBy</code>, of course.) Here are the guts of it:</p> <pre><code>public static TSource MinBy&lt;TSource, TKey&gt;(this IEnumerable&lt;TSource&gt; source, Func&lt;TSource, TKey&gt; selector) { return source.MinBy(selector, null); } public static TSource MinBy&lt;TSource, TKey&gt;(this IEnumerable&lt;TSource&gt; source, Func&lt;TSource, TKey&gt; selector, IComparer&lt;TKey&gt; comparer) { if (source == null) throw new ArgumentNullException("source"); if (selector == null) throw new ArgumentNullException("selector"); comparer = comparer ?? Comparer&lt;TKey&gt;.Default; using (var sourceIterator = source.GetEnumerator()) { if (!sourceIterator.MoveNext()) { throw new InvalidOperationException("Sequence contains no elements"); } var min = sourceIterator.Current; var minKey = selector(min); while (sourceIterator.MoveNext()) { var candidate = sourceIterator.Current; var candidateProjected = selector(candidate); if (comparer.Compare(candidateProjected, minKey) &lt; 0) { min = candidate; minKey = candidateProjected; } } return min; } } </code></pre> <p>Note that this will throw an exception if the sequence is empty, and will return the <em>first</em> element with the minimal value if there's more than one.</p>
    singulars
    1. This table or related slice is empty.
    1. POHow to use LINQ to select object with minimum or maximum property value
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USChris Marisic
    1. USJon Skeet
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COI would replace the Ienumerator + while with a foreach
      singulars
      1. PO
      1. USggf31416
    2. COCan't do that easily due to the first call to MoveNext() before the loop. There are alternatives, but they're messier IMO.
      singulars
      1. PO
      1. USJon Skeet
    3. CONice method. Should be in actual Linq package. Why do you throw on empty sequences though? The Min overload that actually returns an element from the enumerable (http://msdn.microsoft.com/en-us/library/bb352408.aspx) returns null in that case.
      singulars
      1. PO
      1. USMatthew Flaschen
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload