System and method of data management

A method for data management comprising:

• receiving, by a first sorting function, a first sorting instruction for sorting a first data set from a first source, wherein the first sorting instruction indicates data objects in an order, and the first data set includes first data items at least one of which is related to a data object among the data objects;
• sorting the first data set, by the first sorting function, by grouping, from the first data items, all the data items corresponding to a same data object into a same group to obtain one or more first groups, and ordering the one or more first groups according to the order of the data objects indicated by the first sorting instruction to obtain a first sorted data set;
• wherein the first sorted data set is used for a generation of a first processed data set;
• receiving, by a second sorting function, a second sorting instruction for sorting a second data set from a second source, wherein the second sorting instruction indicates the data objects in the order, and the second data set includes data items at least one of which is related to the data object among the data objects;
• sorting the second data set, by the second sorting function, by grouping, from the second data items, all the data items corresponding to a same data object into a same group to obtain one or more second groups, and ordering the one or more second groups according to the order of the data objects indicated by the second sorting instruction;
• wherein the second sorted data set is used for a generation of a second processed data set;
• obtaining, by a joining function, the first processed data set and the second processed data set;
• joining, by the joining function, the first processed data set and the second processed data set to obtain a single joined data set;
• and
• transmitting, by the joining function, the single joined data set to a data consumer.