问题
I have two data sources, one sql table, one flat file (csv). Both sources have exact same columns. Example Data:
Table:
HCN Name Surname DOB
111 John Black 2013-12-10
222 Jack White 1989-01-14
333 Brian Brown 2000-04-22
FlatFile:
HCN Name Surname DOB
111 John Black 2013-12-10
444 Alex Smith 1978-05-16
Note that the column HCN is the primary key. What I need to do is to get such records included by the table but FlatFile.
Expected output:
HCN Name Surname DOB
222 Jack White 1989-01-14
333 Brian Brown 2000-04-22
I have to do it in Data Flow of my SSIS Package. I am doing below to get the matching records (HCN:111), but how I can get the unmatched ones I could not figure out. Any help would be appreciated.
回答1:
SOLUTION 1 : LOOKUP:
You can follows theses steps:
- add a lookup transformation
in connection tab, choose your flatfile connexion
in column tab, drag and drop the Join column in general tab, handle not matching entries by redirect rows - Redirect the non matching output to your destination
SOLUTION 2 : LEFT ANTI JOIN
You can follows theses steps:
1 Sort datasets / or modifiy the properties of the source to isSorted = true
2 Use a LEFT JOIN on the key, and add a new column containing the id of the right side
3 Add a conditional split condition on right side ID is null
Then redirect CASE 1 splited data to your destination, you have only rows from the left side without right side correspondance
回答2:
Firstly I suggest you to load Flat file data into OLEDB staging table, Which is optional. If you Load flat file data into destination, you can align primary keys for the look up.
Create a staging table to insert unmatched records, you will only need asynchronous transformation in this case
Refer Below for Look up Transformation
Check for Look up Columns:
Here is example
来源：https://stackoverflow.com/questions/50681600/how-to-get-unmatched-data-between-two-sources-in-ssis-data-flow