I have SSIS package that reads XML file and put the data in database tables. In SSIS package I have added column names between two columns and I changed my table design exactly same way. That is , lets say, in SSIS package mapping I added new columns col2 and col3 between col1 and col4; then I modified my table accordingly (added new columns col2 and col3 between col1 and col4). This worked for me in Test server as I have proper access to it.
However, for UAT, to add new columns in between two columns I have to create a script and give to DBA.
I tried this:
update [information_schema].[columns]
set ordinal_position = 2
where table_name = 'Report_JR'
and column_name = 'col2'
I'm getting error: Ad hoc updates to system catalogs are not allowed.
How can I add new columns in between two existing columns? Is this error I'm getting due to permission issue? Please help.
Related
I want to be able to update a specific column of a table using data from another table. Here's what the two tables look like, the DB type and SSIS components used to get the tables data (btw, both ID and Code are unique).
Table1(ID, Code, Description) [T-SQL DB accessed using ADO NET Source component]
Table2(..., Code, Description,...) [MySQL DB accessed using ODBC Source component]
I want to update the column Table1.Description using the Table2.Description by matching them with the right Code first (because Table1.Code is the same as Table2.Code).
What i tried:
Doing a Merge Join transformation using the Code column but I couldn't figure out how to reinsert the table because since Table1 has relationships i can't simply drop the table and replace it with the new one
Using a Lookup transformation but since both tables are not the same type it didn't allow me to create the lookup table's connection manager (which would be for in my case MySQL)
I'm still new to SSIS but any ideas or help would be greatly appreciated
My solution is based on #Akina's comments. Although using a linked server would've definitely fit, my requirement is to make an SSIS package to take care of migrating some old data.
The first and last are SQL tasks, while the Migrate ICDDx is the DFT that transfers the data to a staging table created during the first SQL task.
Here's the SQL commands that gets executed during Create Staging Table :
DROP TABLE IF EXISTS [tempdb].[##stagedICDDx];
CREATE TABLE ##stagedICDDx (
ID INT NOT NULL,
Code VARCHAR(15) NOT NULL,
Description NVARCHAR(500) NOT NULL,
........
);
and here's the sql command (based on #Akina's comment) for transferring from staged to final (inside Transfer Staged):
UPDATE [MyDB].[dbo].[ICDDx]
SET [ICDDx].[Description] = [##stagedICDDx].[Description]
FROM [dbo].[##stagedICDDx]
WHERE [ICDDx].[Code]=[##stagedICDDx].[Code]
GO
Here's the DFT used (both TSQL and MySQL sources return sorted output using ORDER BY Code, so i didnt have to insert Sort components before the Merge Join) :
Note: Btw, you have to setup the connection manager to retain/reuse the same connection so that the temporary table doesn't get deleted before we transfer data to it. If all goes well, then after the Transfer Staged SQL Task, the connection would be closed and the global temporary table would be deleted.
how can we insert new data or update the data from one table to another table from MySQL to SQL server using ssis and by not using lookup.
A common way to do this is to insert new data to an empty temporary table, and then run SQL Merge command (using separate SQL Query task).
MERGE command is super powerful and can do updates, inserts or even deletes. See full description of Merge here:
https://learn.microsoft.com/en-us/sql/t-sql/statements/merge-transact-sql?view=sql-server-2017
The design for this will look like below :
You will have 4 tables and 1 view : Source, TMP_Dest (exactly as source with no PK), CHG_Dest(for changes, exactly as destination with no PK), Dest(will have PK), FV_TMP_Dest (this is in case the destination looks different than the source - different field types)
SSIS package :
1.Use ExecuteSQLTask and truncate TMP_Dest because it is just temporary for the extracted data
Use ExecuteSQlTask and truncate CHG_Dest because it is just temporary for the extracted data
Use one DataFlowTask for loading data from Source to TMP_Dest
Define two variables OperationIDInsert=1 and OperationIDUpdate=2 (the values are not important, you can set them as you want) -> you will use them at 5. point below
Use another DataFlowTask in which you will have:
on the left side OLE DB Source in which you will extract data from the view, ordered by PK (do not forget to set the SortKeyPosition from Advanced Editor for the PK fields)
on the right side OLE DB Source in which you will extract data from the Dest ordered by PK (do not forget to set the SortKeyPosition from Advanced Editor for the PK fields)
LEFT JOIN between this
on the left side ( "insert side") you will have: a derived column in which you will assign as Expression the OperationIDInsert variable AND an OLE DB Destination for inserting the data in CHG_Dest table. In this way, you will insert the data that have to be inserted in the destination table and you know this because you have the OperationIDInsert column.
on the right side you will do the same thing but using OperationIDUpdate column
You will use ExecuteSQLTask in the ControlFlow and will have an SQL Merge. Based on the PK fields and OperationIDInsert/OperationIDUpdate fields you will either insert the data or update it.
Hope this will help you. Let me know if you need additional info.
We have one table (S1) from database1 and are loading data into another database (datbase2) and table (D1). We implemented this in ssis using OLEDB source (database1.S1) and OLEDB Destination (datbase2.D1).
We have to add a new column 'Addeddate' to destination table. For this we have used a Derived column in between source and destination.
Now my Thought is, instead of using a derived column can we create the added column in the source itself? because we need just record loaded date.
Yes, if you use a SQL Query in your Source (and you should) all you have to do is add the column to the query.
Something like,
SELECT
S1.Column1, S1.Column2, ... S1.ColumnN, GETDATE() AS RecordLoadedDate
FROM S1
WHERE ...
i have two data tables A and B in sql database .
i want to copy the content of table A to table B i am not able to copy the content of table A if it has dependencies (foreign key relationship)please help me with the control file code (which is present in SQL loader like sqldir) and my intention is to copy (export)the contents from one table in windows and copy (import) the contents into other table using script(.sh or .ctl file),i followed the below approach : sql loader using control file(.ctol file).Thanks..
Regards,
Vamsi Alla
While not a direct answer to your question, why go through the hassle when you can do it directly from SQL (your syntax may vary, but you get the idea)?
INSERT INTO table_b (column1, column2, ... )
SELECT column1, column2, ...
FROM table_a
[WHERE conditions];
I have two SQL Server databases, and I need to write a script to migrate data from database A to database B. Both databases have the same schema.
I must loop through the tables and for each table I must follow those rules:
If the item I'm migrating does not exist in the target table (for example, the comparison is made on a column Name) then I insert it directly.
If the item I'm migrating exists in the target table then I need to only update certain columns (for example, only update Age and Address but do not touch other columns)
Can anyone help me with that script? Any example would suffice. Thanks a lot
EDIT:
I just need an example for one table. No need to loop, I can handle each table separately (because each table has its own comparison column and update columns)
The MERGE statement looks like it can help you here. An Example:
MERGE StudentTotalMarks AS stm
USING (SELECT StudentID,StudentName FROM StudentDetails) AS sd
ON stm.StudentID = sd.StudentID
WHEN MATCHED AND stm.StudentMarks > 250 THEN DELETE
WHEN MATCHED THEN UPDATE SET stm.StudentMarks = stm.StudentMarks + 25
WHEN NOT MATCHED THEN
INSERT(StudentID,StudentMarks)
VALUES(sd.StudentID,25);
The merge statement is available as of SQL Server 2008 so you are in luck
Instead of creating a script why don't you copy the source table under a different name into the target server (update needs to take place).
Then just do a simple insert where name does not exist.
Here is the SQL for step 1 only.
INSERT INTO [TableA]
SELECT Name,
XX,
XXXX
FROM TableB
WHERE NOT NAME IN(SELECT NAME
FROM TableA)