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PO
 

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    <p>If you know in advance all the values that you'll have for columns, then you can hardcode them in your query. Otherwise it gets a lot more complicated. Here it is in Oracle SQL:</p> <pre><code>with my_data as (select 'agra' city, 'atm' "type", 'X' "name" from dual union select 'agra' city, 'branch' "type", 'X1' "name" from dual union select 'delhi' city, 'atm' "type", 'X2' "name" from dual union select 'agra' city, 'atm' "type", 'X3' "name" from dual union select 'agra' city, 'atm' "type", 'X4' "name" from dual union select 'delhi' city, 'branch' "type", 'X5' "name" from dual union select 'chennai' city, 'branch' "type", 'X6' "name" from dual) select city, sum(decode("type", 'atm', 1, 0)) as ATM, sum(decode("type", 'branch', 1, 0)) as branch from my_data group by city; </code></pre> <p>If the number of columns is unknown, Oracle has a '<a href="http://www.oracle-developer.net/display.php?id=506" rel="nofollow">PIVOT XML</a>' statement that allows it to return all of the summarized data in one XML:</p> <pre><code>select * from my_data PIVOT XML (count("name") for "type" in (ANY)); </code></pre> <p>You can parse each column out yourself using the <a href="http://docs.oracle.com/cd/B19306_01/server.102/b14200/functions052.htm" rel="nofollow">EXTRACTVALUE()</a> function, but this still implies that you know how many columns there are ahead of time. I believe that Oracle SQL doesn't have the ability to create a pivot table with a dynamic number of columns. It can be done in PL/SQL though, where you'd use a cursor to dynamically concatenate your SQL.</p>
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    1. POGetting multiple aggregations in Single statement
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    1. USGreg
    1. USGreg
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    1. COHard code? What if there are 100 cities instead of just 3?
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    2. CO@Annjawn: The WITH clause is possibly misleading; it is just a way of creating a 'temporary table' that contains the data you showed (with the usual anonymous table — it is weird how often SQL questions omit the table name(s)). You would not need to key that in your real database; you'd just select directly from your table. You'd write the SQL starting with the SELECT in column 1.
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      1. USJonathan Leffler
 

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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.

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