将2个SQL SELECT查询合并为一个

Question

I have (2) tables (1) is Prices and the other is Orders

Prices:

Symbol varchar
Open decimal
High decimal
Low decimal
Date DateTime

Orders:

Ticker varchar
Enter decimal
EntDate datetime
Exit decimal
ExtDate datetime

I'd like a query that give me all the pricing data for a specific datetime range and all the orders for that symbol for that same datetime range:

SELECT
   T1.Symbol
   , P1.Open
   , P1.High
   , P1.Low
   , P1.Close
   , P1.Date
   , O1.EntDate
   , O1.Enter
   , O1.ExtDate
   , O1.Exit
FROM Prices AS P1 
INNER JOIN ORDERS AS O1 ON O1.Ticker = P1.Symbol
WHERE P1.Date < CONVERT(datetime, '01/01/2012 10:00 AM')

Obviously this just does not work, I get multiple listings for Orders repeated for every line of Price Data.

Example Prices Table

 Sym    Open   High    Low    Close    Date
 ABC     1         3         1           2        1/1/2011 10:01 AM
 ABC     1         3         1           2        1/1/2011 10:02 AM
 ABC     1         3         1           2        1/1/2011 10:03 AM
 ABC     1         3         1           2        1/1/2011 10:04 AM
 ABC     1         3         1           2        1/1/2011 10:05 AM
 ABC     1         3         1           2        1/1/2011 10:06 AM
 ABC     1         3         1           2        1/1/2011 10:07 AM
 ABC     1         3         1           2        1/1/2011 10:08 AM
 ABC     1         3         1           2        1/1/2011 10:09 AM
 ABC     1         3         1           2        1/1/2011 10:10 AM

Example Orders Table

Sym  Enter   EntDate            Exit ExtDate
ABC   1      1/1/2011 10:-00    3    1/1/2011 10:02 AM  
ABC   1      1/1/2011 10:-03    3    1/1/2011 10:04 AM  

Example Output for Prices and Orders Query with Date and EntDate < 1/1/2011 10:07 AM AND Symbol = ABC

Sym    Open   High    Low    Close               Date                Enter  EntDate                 Exit      ExtDate
ABC     1         3         1           2        1/1/2011 10:01 AM     1    1/1/2011 10:-00         3         1/1/2011 10:02 AM
ABC     1         3         1           2        1/1/2011 10:02 AM     1    1/1/2011 10:-03         3         1/1/2011 10:04 AM
ABC     1         3         1           2        1/1/2011 10:03 AM
ABC     1         3         1           2        1/1/2011 10:04 AM
ABC     1         3         1           2        1/1/2011 10:05 AM
ABC     1         3         1           2        1/1/2011 10:06 AM
ABC     1         3         1           2        1/1/2011 10:07 AM

Answer 1

您需要拥有P1.Symbol而不是T1.Symbol

Answer 2

Consider joining only the orders for the same day as the Price row:

from    Prices as P1 
left join 
        Orders as O1 
on      O1.Ticker = P1.Symbol
        and p1.Date <= O1.ExtDate and O1.ExtDate < dateadd(day,1,p1.Date)