Unless I am missing something in your explanation, it sounds like you just want to do something like the following.
If your sample data is:
CREATE TABLE WarehouseTransaction([WarehouseID] int, [TransactionID] int, [TransactionDate] datetime, [RequestedBy] int, [TransactionTypeID] int);
INSERT INTO WarehouseTransaction ([WarehouseID], [TransactionID], [TransactionDate], [RequestedBy], [TransactionTypeID])
VALUES (27, 36101398, '2012-04-18 14:49:34', 3, 1),
(29, 1234578, getdate(), 3, 1);
CREATE TABLE Warehousedetail ([WarehouseID] int, [PackID] int, [Quantity] numeric(20, 5)) ;
INSERT INTO Warehousedetail ([WarehouseID], [PackID], [Quantity])
VALUES
(27, 4, 25.000000000),
(27, 26, 175.000000000),
(27, 30, 25.000000000),
(29, 4, 25.000000000),
(29, 26, 175.000000000),
(29, 30, 25.000000000) ;
Then the query will be similar to this:
select t.WarehouseID,
t.TransactionID,
t.TransactionDate,
t.RequestedBy,
t.TransactionTypeID,
d.PackId,
d.Quantity
from WarehouseTransaction t
inner join Warehousedetail d
on t.WarehouseID = d.WarehouseID
where t.TransactionDate >= Cast(getdate() as date)
and t.TransactionDate <= DateAdd(d, 1, Cast(getdate() as date))
See SQL Fiddle with Demo
Which generates the result:
| WAREHOUSEID | TRANSACTIONID | TRANSACTIONDATE | REQUESTEDBY | TRANSACTIONTYPEID | PACKID | QUANTITY |
-----------------------------------------------------------------------------------------------------------------------
| 29 | 1234578 | December, 24 2012 13:29:00+0000 | 3 | 1 | 4 | 25 |
| 29 | 1234578 | December, 24 2012 13:29:00+0000 | 3 | 1 | 26 | 175 |
| 29 | 1234578 | December, 24 2012 13:29:00+0000 | 3 | 1 | 30 | 25 |
You did not specify what version of SQL Server but the Cast(getdate() as date) will work in SQL Server 2008+, if you are not in SQL Server 2008, then you can use the following:
select t.WarehouseID,
t.TransactionID,
t.TransactionDate,
t.RequestedBy,
t.TransactionTypeID,
d.PackId,
d.Quantity
from WarehouseTransaction t
inner join Warehousedetail d
on t.WarehouseID = d.WarehouseID
where t.TransactionDate >= DateAdd(Day, Datediff(Day,0, GetDate()), 0)
and t.TransactionDate <= DateAdd(d, 1, Datediff(Day,0, GetDate()))
Edit, if you want your transactions to contain yesterday and today in SQL Server 2005 you can use:
select t.WarehouseID,
t.TransactionID,
t.TransactionDate,
t.RequestedBy,
t.TransactionTypeID,
d.PackId,
d.Quantity
from WarehouseTransaction t
inner join Warehousedetail d
on t.WarehouseID = d.WarehouseID
where t.TransactionDate >= DateAdd(Day, Datediff(Day,0, GetDate()), -1)
and t.TransactionDate <= DateAdd(d, 1, Datediff(Day,0, GetDate()))
See SQL Fiddle with Demo