How to insert more than one record in a new table in one select statement using top1

Question

1.00/5 (2 votes)

See more:

I have a table (TABLE1)

Id1 Id2 dateTime
1    1  2020-08-06 10:45:38.017
2    1  2020-08-06 11:45:38.017
3    2  2020-08-06 10:45:38.017
4    3  2020-08-06 11:45:38.017
5    3  2020-08-06 12:45:38.017

i want to insert the bold ones into a new table(TABLE2) with one select statement
so i'm inserting the latest record for each repeated Id2

The new table has the same fields as well

What I have tried:

insert into TABLE2 select top 1  table1.Id1,table1.Id2, Table1.dateTime from table1 
where table1.Id2 = table2.Id2 order by DateTime desc

currently it's inserting one record

Posted 6-Aug-20 4:33am

Member 14800672

Updated 6-Aug-20 4:44am

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard Deeming · Accepted Answer · 2020-08-06T04:44:00

TOP 1 instructs SQL Server that you only want to return one record, so your query is doing exactly what you've asked it to do.

Based on your description, you want something like:

SQL

WITH cte As
(
    SELECT
        Id1,
        Id2,
        [dateTime],
        ROW_NUMBER() OVER (PARTITION BY Id2 ORDER BY [dateTime] DESC) As RN
    FROM
        table1
)
INSERT INTO table2
(
    Id1,
    Id2,
    [dateTime]
)
SELECT
    Id1,
    Id2,
    [dateTime]
FROM
    cte
WHERE
    RN = 1
;

ROW_NUMBER (Transact-SQL) - SQL Server | Microsoft Docs[^]