Fase 5: provare query di esempio utilizzando l'editor di query

Per configurare e utilizzare l'editor di query di Amazon Redshift v2 per interrogare un database, consulta Working with Query Editor v2 nella Amazon Redshift Management Guide.

Ora, provare alcune query di esempio, come illustrato di seguito. Per ulteriori informazioni sull'utilizzo del SELECT comando, SELECTconsulta la Amazon Redshift Database Developer Guide.

-- Get definition for the sales table.
SELECT *    
FROM pg_table_def    
WHERE tablename = 'sales';  

-- Find total sales on a given calendar date.
SELECT sum(qtysold) 
FROM   sales, date 
WHERE  sales.dateid = date.dateid 
AND    caldate = '2008-01-05';

-- Find top 10 buyers by quantity.
SELECT firstname, lastname, total_quantity 
FROM   (SELECT buyerid, sum(qtysold) total_quantity
        FROM  sales
        GROUP BY buyerid
        ORDER BY total_quantity desc limit 10) Q, users
WHERE Q.buyerid = userid
ORDER BY Q.total_quantity desc;   

-- Find events in the 99.9 percentile in terms of all time gross sales.
SELECT eventname, total_price 
FROM  (SELECT eventid, total_price, ntile(1000) over(order by total_price desc) as percentile 
       FROM (SELECT eventid, sum(pricepaid) total_price
             FROM   sales
             GROUP BY eventid)) Q, event E
       WHERE Q.eventid = E.eventid
       AND percentile = 1
ORDER BY total_price desc;