This database was created to better understand the long-term impact of precision feeding on the performances of gestating sows, compared to sows fed a conventional feeding strategy. It gathers data from two experiments carried out with feed supplies adjusted individually and daily based on energy and amino acids requirements (trial 1) and also on minerals during the last month of gestation (trial 2). The database contains a large amount of data including feed composition and intakes, behaviours, ambient parameters, and sow performances of group-housed gestating sows.