Hi @Spunny ,
I recommend that you consolidate the data first, combining the data of the tables into one dataset as much as possible. Within a data region, you can create multiple tables from different datasets, but one dataset per table. I assume you have two datasets, each with a [ID] column, create table A and table B based on the two datasets, then maybe you can use the LOOK UP function in SSRS to Insert the values from table B into table A.
Best Regards,
Joy
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