Abstract: Meta-data is used to generate code which retrieves source data from multiple sources having different formats and places the data into a set of tables having a single schema. Stored procedures access meta-data from a set of meta-data tables, configure one or more destination tables, generate query code from the meta-data and store the source data in the destination tables. When storing the data, data may be replaced or updated as part of storing the source data. The meta-data tables contain meta-data that is combined into code statements by the stored procedures. The code statements are used to retrieve source data from one or more source data stores. Destination tables for storing retrieved data may have a single schema for storing source data, wherein the source data includes several different domains having different numbers of levels and attributes and originates from more than one source.