Different locking statements

what can be the different types of locking statements in a Oracle Developer application. Two forms of locking i use are:-
a) FOR UPDATE OF COLUMN_NAME NOWAIT;
B) FOR UPDATE OF COLUMN_NAME;
I hope my question is clear. Please help in solving my doubt as it is very urgent.

are all records in the table locked? or is there another filter condition
alternatively
After the update statement ... issue commit/rollback

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I'm needing to use a if statement in a sql query. I have written an if statement to handle it but it won't work I think due to the 2 statements return different values. How would I make this work:
ALTEr PROCEDURE [dbo].[spBookings]
@callAgentID VARCHAR(3),
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@optionRank nvarchar(20),
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BEGIN
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Taxis.OwnerSurname As OwnSur,
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Taxis.DriverCell,
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Taxis.Region,
Bookings.Complete AS Comp,
Bookings.CampaignID AS CampID,
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Bookings.SmsStatus AS Sms,
Bookings.Reward
FROM Taxis INNER JOIN Bookings ON Bookings.TaxiID=Taxis.ID
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Order By Taxis.ID
END
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Try the below:
ALTEr PROCEDURE [dbo].[spBookings]
@callAgentID VARCHAR(3),
@optionReg nvarchar (20),
@optionRank nvarchar(20),
@optionBook nvarchar(20)
--@TaxID VARCHAR(50)
AS
Begin
if (@optionReg= 'All' AND @optionRank='All' AND @optionBook='Not Booked')
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GETDATE()
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OR callAgentID = @callAgentID AND Value2=''
ORDER BY Taxis.ID
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Taxis.OwnerName AS OwnName,
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Taxis.DriverCell,
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Taxis.Region,
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Bookings.CampaignID AS CampID,
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Taxis.RankBookedAt,
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Bookings.SlotTime As Time,
Bookings.SmsStatus AS Sms,
Bookings.Reward
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The conditions separated by OR has to be wrapped within barckets otherwise it wont work as intended
ie like below
.....WHERE callAgentID = @callAgentID AND Value2<
GETDATE()
OR (callAgentID = @callAgentID AND Value2 IS NULL)
OR (callAgentID = @callAgentID AND Value2='')
ORDER BY Taxis.ID....
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

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are you sure your data meets the JOIN conditions?
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select single * from KONP into ls_konp
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if sy-subrc eq 0.
select * from from A905 into table lt_a905 where
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