Question

I’m not sure why this isn’t working today, I’ve done very similar a few times… a simple subquery in my select statement. Here’s what I’m trying to do:

SELECT  TradeDate, Symbol, (SELECT COUNT(Symbol) 
     FROM tblDailyPricingAndVol AS T2 WHERE T2.TradeDate = TradeDate 
          AND T2.Symbol = Symbol) AS CountOf 
FROM tblDailyPricingAndVol  WHERE CountOf >1
ORDER BY TradeDate, Symbol

tblDailyPricingAndVol is a table with relevant fields TradeDate and Symbol… so there is a record for each symbol, for every trading day (for the most part).. I’d like my query to return the number of duplicates for a trade day, or all trade dates with the count of symbols that have more than one record for that date. Hope that makes sense.. thanks.

Answer 1

try this..

SELECT  TradeDate, Symbol, COUNT(Symbol)  
FROM tblDailyPricingAndVol  
GROUP BY TradeDate, Symbol
HAVING COUNT(Symbol) > 1
ORDER BY TradeDate, Symbol