Solved

Insert Into for New Data Only

Posted on 2013-05-20
4
195 Views
Last Modified: 2013-12-16
I have a table (tbl1) with 8 rows of data for Agents and their Sales
A - 3
B - 6
C - 12
D - 7
E - 8
F - 9
G - 10
H - 22

I want to insert data into a second table (tbl2), but only new data. So if tbl2 currently has Agents and Sales in it for Agents A & B, when I perform an insert I only want data for Agents C, D, E, F, and G to go into tbl2. Thus the data already in tbl2 for Agents A & B does NOT change.
I am not writing the correct Insert statement or Update, need help. Thanks
0
Comment
Question by:SeTech
  • 2
4 Comments
 
LVL 4

Accepted Solution

by:
Kent Fichtner earned 500 total points
ID: 39181386
how are you going to be doing this insert?  is it going to be based on a trigger, or is it a one time thing that you are writing a query for?

you could try something like:

Update TBL2
SET <column> = <data here>
WHERE AGENT NOT IN (SELECT AGENT FROM TBL1)
0
 

Author Comment

by:SeTech
ID: 39181404
I will send the new data weekly, but how could you do an update when the data is NOT yet in tbl2?
0
 
LVL 4

Expert Comment

by:Kent Fichtner
ID: 39181429
I guess I am not quite understanding what you are looking to do.  Where are you getting the data for tbl2?  How are you going to be inserting it (through a stored procedure)?  As long as tbl2 has a column for agent, the were clause above should still be valid.  In the case of the first insert it would find no agents on tbl2 the same as tbl1 and would insert everything.
0
 
LVL 59

Expert Comment

by:Kevin Cross
ID: 39181482
You would use NOT EXISTS.

INSERT INTO tbl2(col1, col2)
SELECT col1, col2
FROM tbl1
WHERE NOT EXISTS (
    SELECT 1
    FROM tbl2
    WHERE tbl2.col1 = tbl1.col1
)
;

Open in new window


Just adjust the WHERE clause of the subquery to be the correct columns that match an existing record in tbl2.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
encyps queries mssql 15 37
Update in Sql 7 30
Joining Two Tables In SQL and combining records 6 51
Distributed Replay - When should i use it? 1 24
SQL Server engine let you use a Windows account or a SQL Server account to connect to a SQL Server instance. This can be configured immediatly during the SQL Server installation or after in the Server Authentication section in the Server properties …
In this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…
A company’s greatest vulnerability is their email. CEO fraud, ransomware and spear phishing attacks are the no1 threat to a company’s security. Cybercrime is responsible for the largest loss of money to companies today with losses projected to r…

929 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now