ssis - How to apply lookup transformation column wise multiple times -


i need compare 2 data sets - excel , db. while comparing need check 4 fields say, a, b c & d columns both data sets. output should tell field not matching mismatch a, mismatch b etc. how can implement in ssis? tried implementing using lookup transformations multiple times. 1st time column , non matching records mismatch , send matching records 2nd lookup column & column b comparison. no match output 2nd lookup mismatch b this.. not working after 1st lookup.

use merge join transformation. sort both inputs on join key. once merged, use derived column component evaluate columns. i.e. 

excelcolumna == dbcolumna ? "" : ("excel: + "excelcolumna + "; db: " + dbcolumna )

name each column mismatcha, etc.


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