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Insert rows not contained in one table to another


Insert rows not contained in one table to another

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Insert rows not contained in one table to another
Tag : sql , By : Ed.
Date : November 28 2020, 04:01 AM

will help you You can get all the rows from [DB].[dbo].[Table_1a] that do not exist in [DB].[dbo].[Table_1a], by using left join:
INSERT [DB].[dbo].[Table_1] 
  SELECT t1a.*
  FROM [DB].[dbo].[Table_1a] t1a
  LEFT JOIN [DB].[dbo].[Table_1] t1
  ON t1a.[Column] = t1.[Column]
  WHERE t1.[Column] IS NULL

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Unique rows in duplicate data contained in one table


Tag : sql , By : Anna
Date : March 29 2020, 07:55 AM
This might help you One method that might be useful is to calculate a hash of each record and run a match based on that. It doesn't have to be some super-secure SHA-whatever, just the regular Oracle Ora_Hash(), as long as you're going to get a pretty small chance of hash collisions. Ora_Hash ought to be sufficent with a max_bucket_size of 4,294,967,295.
I'd just run joins between the two sets of hashes. Hash joins (as in the join mechanism) are very efficient.

PostgreSQL - insert rows based on select from another table, and update an FK in that table with the newly inserted rows


Tag : sql , By : Ryan Adriano
Date : March 29 2020, 07:55 AM
like below fixes the issue There are several ways to solve the problem.
1. temporarily add a column
INSERT INTO dateset (start)
SELECT start FROM reminder;

WITH
CTE_Joined
AS
(
    SELECT
        reminder.id AS reminder_id
        ,reminder.dateset_id AS old_dateset_id
        ,dateset.id AS new_dateset_id
    FROM
        reminder
        INNER JOIN dateset ON dateset.start = reminder.start
)
UPDATE CTE_Joined
SET old_dateset_id = new_dateset_id
;
reminder
id    start         dateset_id
3     2015-01-01    NULL
7     2015-01-01    NULL
dateset
id    start
1     2015-01-01
2     2015-01-01
reminder
id    start         dateset_id
3     2015-01-01    1
7     2015-01-01    2
reminder
id    start         dateset_id
3     2015-01-01    2
7     2015-01-01    1
INSERT INTO dateset (start)
SELECT start FROM reminder;
WITH
CTE_reminder_rn
AS
(
    SELECT
        id
        ,start
        ,dateset_id
        ,ROW_NUMBER() OVER (PARTITION BY start ORDER BY id) AS rn
    FROM reminder
)
,CTE_dateset_rn
AS
(
    SELECT
        id
        ,start
        ,ROW_NUMBER() OVER (PARTITION BY start ORDER BY id) AS rn
    FROM dateset
)
,CTE_Joined
AS
(
    SELECT
        CTE_reminder_rn.id AS reminder_id
        ,CTE_reminder_rn.dateset_id AS old_dateset_id
        ,CTE_dateset_rn.id AS new_dateset_id
    FROM
        CTE_reminder_rn
        INNER JOIN CTE_dateset_rn ON 
            CTE_dateset_rn.start = CTE_reminder_rn.start AND
            CTE_dateset_rn.rn = CTE_reminder_rn.rn
)
UPDATE CTE_Joined
SET old_dateset_id = new_dateset_id
;

select rows not contained in table


Tag : chash , By : FarmerDave
Date : March 29 2020, 07:55 AM
hop of those help? I have a table containing an ID as follows: ,
why doesn´t it work with an empty list?
SELECT * from TABLE1 where ID NOT IN ('')
SELECT * from TABLE1 where ID NOT IN (NULL)

SQL : select rows with value in some column and the value does is not contained in another table


Tag : sql , By : Alpinfish
Date : March 29 2020, 07:55 AM
it should still fix some issue There are two tables , Try this:
SELECT student.ID 
FROM Students student
WHERE 0 = (SELECT COUNT(*) 
           FROM Actions action 
           WHERE action.Description LIKE CONCAT('%', student.Name, '%')
AND student.Age = 19;

How can I fetch the number of rows from a database table and insert the total rows into columns of a different table usi


Tag : php , By : picamiolo
Date : March 29 2020, 07:55 AM
it helps some times I have a table in my database where I want to track the number of downloads for each uploaded file in my website. I have succeeded in inserting user details after a successful download of a file. Each user that downloads a file the user ip address is save in my database tbl (All_downloads) and the filename the user downloaded. I have a different table (Songs) where I stored all uploaded files and I added a column in the table name "DOWNLOAD COUNTER", now I want to fetch the total number of downloads from tbl ALL_downloads and INSERT the total number into tbl "songs" (I WANT IT TO BE GROUP BY THE SONG NAME). , The basic query to get your counts is:
SELECT count(*)
FROM songs_download_counter
GROUP BY name
UPDATE
    songs
SET
    download_counter =
        (
        SELECT count(*)
        FROM songs_download_counter d
        WHERE d.name = songs.name
        )
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