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Insert  using jdbc - sql syntax !

Posted on 2006-06-15
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Last Modified: 2011-09-20
What is the syntax for this: (If I do not want to insert anything for the DATEs  - keep them empty or null or ?ever)

Insert into thistable  (email, failurecount, indate, outdate, timestamp) values (_Esam@ee.com, 005, no_date, no_date, timestamp)

Thax..
_Esam
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Question by:_Esam
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CEHJ earned 20 total points
ID: 16913669
You need a PreparedStatement if you're working in a loop:


PreparedStatement ps = conn.prepareStatement("Insert into thistable  (email, failurecount, indate, outdate, timestamp) values (?, ?, ?, ?, ?)");

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by:_Esam
ID: 16913782
Can I also do it with a Statement and addBatch to this Statement?

_Esam....
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by:CEHJ
ID: 16913802
Yes that's better still with a PreparedStatement
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by:_Esam
ID: 16914044
>PreparedStatement ps = conn.prepareStatement("Insert into thistable  (email, failurecount, indate, outdate, timestamp) values (?, ?, ?, ?, ?)");

How do I set some of these: , ?, ?   from an objects value fields...?

Let me know if you need clarification..

Thax
_Esam
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by:CEHJ
ID: 16914990
ps.setString(1, x.getEmailAddress());
ps.setInt(2, x.getFailureCount());
//etc.
ps.executeUpdate();
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Author Comment

by:_Esam
ID: 16915128
As you posted earlier:
>You need a PreparedStatement if you're working in a loop:


PreparedStatement ps = conn.prepareStatement("Insert into thistable  (email, failurecount, indate, outdate, timestamp) values (?, ?, ?, ?, ?)");

<

Now, how do I check that I want to insert this record only if it does not exist in the table?
I am using PreparedStatement in this regard...

Thanks.
_Esam


PS: have you had a chance to look at the other question?!
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Expert Comment

by:objects
ID: 16916752
> Can I also do it with a Statement and addBatch to this Statement?

Yes, if you're doing lots of inserts to the one table then a batch is a good way to go.
To use a batch you can only use a PreparedStatement.

http://javaalmanac.com/egs/java.sql/BatchUpdate.html

> Now, how do I check that I want to insert this record only if it does not exist in the table?

you need to do a seperate query to achieve that.
or catch the error on insert if handled by primaty key constraints.
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Assisted Solution

by:Mayank S
Mayank S earned 20 total points
ID: 16920377
>> To use a batch you can only use a PreparedStatement.

Why, you can also use statement.addBatch () and statement.executeBatch () :) ? But well, PreparedStatement will still give better performance.
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Author Comment

by:_Esam
ID: 16920798
> Now, how do I check that I want to insert this record only if it does not exist in the table?

you need to do a seperate query to achieve that.
or catch the error on insert if handled by primaty key constraints.


Well, the idea is to avoid doing another query!
The table may have upto 4-5 millions records...

What about the updatable resultset ???

I can insert/update at the same time??

Thanks.
_Esam
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Author Comment

by:_Esam
ID: 16924029
Goes back into the loop again :)

How do I set the Timestamp filed???

Come on..

_Esam
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Assisted Solution

by:objects
objects earned 20 total points
ID: 16924205
> What about the updatable resultset ???

as I said, it'll probably be a lot slower than using a batch.
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Expert Comment

by:CEHJ
ID: 16946723
:-)
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