Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>In order to get this result, you will need to use the <a href="http://msdn.microsoft.com/en-us/library/ms177410%28v=sql.105%29.aspx" rel="nofollow"><code>PIVOT</code></a> function. This transforms the data from multiple rows into columns.</p> <p>If you know the values ahead of time or you will have a limited number of <code>TestId</code> values, then you can hard-code the query making the query static.</p> <pre><code>SELECT Name, Age, [1] AS Test1, [2] AS Test2, [3] AS Test3 FROM ( SELECT P.Name, P.Age, t.TestID, t.Result FROM tests t INNER JOIN person P ON p.ID = t.PersonID ) T PIVOT ( sum(Result) FOR TestID IN ([1], [2], [3]) ) piv; </code></pre> <p>See <a href="http://www.sqlfiddle.com/#!3/bf74c/7" rel="nofollow">SQL Fiddle with Demo</a>.</p> <p>But if you have an unknown number of <code>TestId</code> values, then you will want to use dynamic SQL to generate the list of columns at run-time. You Code will be:</p> <pre><code>DECLARE @cols AS NVARCHAR(MAX), @colNames AS NVARCHAR(MAX), @query AS NVARCHAR(MAX) select @cols = STUFF((SELECT distinct ',' + QUOTENAME(testId) from tests FOR XML PATH(''), TYPE ).value('.', 'NVARCHAR(MAX)') ,1,1,'') select @colNames = STUFF((SELECT distinct ',' + QUOTENAME(testId) +' as Test'+cast(testId as varchar(10)) from tests FOR XML PATH(''), TYPE ).value('.', 'NVARCHAR(MAX)') ,1,1,'') set @query = 'SELECT Name, age, ' + @colnames + ' from ( select P.Name, P.Age, t.TestID, t.Result from tests t inner join person P on p.ID = t.PersonID ) x pivot ( sum(Result) for TestID in (' + @cols + ') ) p ' execute(@query) </code></pre> <p>See <a href="http://www.sqlfiddle.com/#!3/bf74c/6" rel="nofollow">SQL Fiddle with Demo</a>.</p> <p>They both will generate the same result, difference being that the dynamic one will increase/decrease the columns if the number of test ids changes:</p> <pre><code>| NAME | AGE | TEST1 | TEST2 | TEST3 | -------------------------------------- | Jack | 25 | 125 | 120 | 75 | | Jill | 23 | 90 | 95 | 7.2 | </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POHow to retrieve multiple detail records plus the master record as a single row?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USTaryn
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POHow to retrieve multiple detail records plus the master record as a single row?
      singulars
      1. PTQuestion
    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. VTAcceptedByOriginator
    1. This table or related slice is empty.
 

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