Database
[{"data":{"category":[{"name":"HELLO","subcategory":["EDUCATION","ART"]},{"name":"HELLO","subcategory":["z","SHORE",]}]}},{"data":{"category":[{"name":"HELLO","subcategory":["EDUCATION","HELLO",]}]}},{"data":{"category":[{"name":"HELLO","subcategory":["GG","ART",]}]}}]
Query
db.collection.update({"data.category.subcategory":"EDUCATION"},{"$push":{"data.category.$[].subcategory":{"$each":["X","Y"]}}},{multi:true})