Copy a table data from one database to another database SQL

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I have had a look at similar problems, however none of the answers helped in my case.

Just a little bit of background. I have Two databases, both have the same table with the same fields and structure. Data already exists in both tables. I want to overwrite and add to the data in db1.table from db2.table the primary ID is causing a problem with the update.

When I use the query:

USE db1;
INSERT INTO db2.table(field_id,field1,field2)
SELECT table.field_id,table.field1,table.field2
FROM table;

It works to a blank table, because none of the primary keys exist. As soon as the primary key exists it fails.

Would it be easier for me to overwrite the primary keys? or find the primary key and update the fields related to the field_id? Im really not sure how to go ahead from here. The data needs to be migrated every 5min, so possibly a stored procedure is required?


first you should try to add new records then update all records.you can create a procedure like below code

PROCEDURE sync_Data(a IN NUMBER ) IS
  BEGIN

   insert into db2.table
     select *
       from db1.table t
         where t.field_id not in (select tt.field_id from db2.table tt);

     begin
       for t in (select * from   db1.table) loop
        update db2.table aa
         set aa.field1  = t.field1,
           aa.field2     = t.field2 
     where aa.field_id = t.field_id;
  end loop;
 end;

END sync_Data

How to copy tables from one database to another in SQL Server, In SQL Server, copying tables between the databases of the same for this, for importing and exporting data from one source into another, this� Another useful tool provided by ApexSQL that can be used to copy SQL Server tables data and schema from the source database to the destination one is the ApexSQL Script tool. This nice tool will create script for the database tables schema and data with the indexes and keys of these tables handling the Identity column insert.


Set IsIdentity to No in Identity Specification on the table in which you want to move data, and after executing your script, set it to Yes again

Six different methods to copy tables between databases in SQL Server, On SQL Server? and on the same database server? Use three part naming. INSERT INTO bar..tblFoobar( *fieldlist* ) SELECT *fieldlist* FROM� Users of SQL Server Database work with various database components including Table, Views, Stored Procedures, etc. In many cases, user may need to copy the SQL Server table schema and data from one database to another database in the same instance or different SQL instance.


I ended up just removing the data in the new database and sending it again.

DELETE FROM db2.table WHERE db2.table.field_id != 0;
USE db1;
INSERT INTO db2.table(field_id,field1,field2)
SELECT table.field_id,table.field1,table.field2
FROM table;

Its not very efficient, but gets the job done. I couldnt figure out the syntax to correctly do an UPDATE or to change the IsIdentity field within MariaDB, so im not sure if they would work or not.

Copy tables from one database to another in SQL Server, This article demonstrates how to copy a table with data from one database to another in a SQL Server database. Method #2: Use SQL Server Management Studio to Copying Table from One DB to Another. The next method to copy table data from one database to another SQL Server is the Export and Import wizard that is available in SQL Server Management Studio. Here, you have the option to either import from the destination database or to export from the source


The overhead of deleting and replacing non-trivial amounts of data for an entire table will be prohibitive. That said I'd prefer to update in place (merge) over delete /replace.

USE db1;
INSERT INTO db2.table(field_id,field1,field2)
SELECT t.field_id,t.field1,t.field2
FROM table t
ON DUPLICATE KEY UPDATE field1 = t.field1, field2 = t.field2

This can be used inside a procedure and called every 5 minutes (not recommended) or you could build a trigger that fires on INSERT and UPDATE to keep the tables in sync.

Copy Table With Data From One Database to Another in SQL Server , Using Generate Scripts. This method enables you to copy not only the table schema and data but also objects, indexes, trigger, constraints, keys,� Run it from the database you want to copy the data into. If the tables don't exist it will create them for you, but you'll probably have to recreate any indexes and such. If the tables do exist, it will append the new data by default but you can adjust that (edit mappings) so it will delete all existing data.


INSERT INTO database1.tabledata SELECT * FROM database2.tabledata;

But you have to keep length of varchar length larger or equal to database2 and keep the same column name

How to Copy SQL Tables from One Database to Another?, In many cases, user may need to copy the SQL Server table schema and data from one database to another database in the same instance or� This method enables you to copy not only the table schema and data but also objects, indexes, trigger, constraints, keys, etc. Go through the steps below to generate a script to fully copy tables from one database to another in SQL Server: Open SQL Server. Right-click on the database name > Tasks > Generate Scripts.


Ways to Copy Table from One Database to another SQL Server, You need to copy a table from one SQL Server database to another, so what To copy the data, you can run a query like this in server-A:. There is not one, but several options to achieve what you want. Your question is not very specific in that respect. You may find this article "SQL SERVER – 2008 – Copy Database With Data – Generate T-SQL For Inserting Data From One Table to Another Table" useful:


How to Copy a Table in SQL Server to Another Database, So, here in this article, I will guide you on how to copy table data from one database to another SQL Server. Let's get started. Techniques to Copy� Most of the time users want to copy the database from one Server to another without any data loss. One of the most emerging queries nowadays is to copy SQL Server database from one Server to another Server. This is a challenging task for end users, therefore, not an easy to execute.


How to Copying Table from One Database to Another in SQL Server, Move user Database (.mdf and .ldf files) to another drive in SQL Server - Duration : 6:36 Duration: 3:47 Posted: Feb 16, 2014 The following SQL statement uses the IN clause to copy the table into a new table in another database: SELECT * INTO CustomersBackup2017 IN 'Backup.mdb' FROM Customers;