Provided in the present application are a method and device for use in querying data. The method comprises: acquiring first data; generating P index keys according to L rows of data in the first data; updating first index information in a first index partition that corresponds to the first data according to the P index keys, a row primary key of the first data and internal data identification of the first data, wherein the internal data identification of the first data is unique in the first index partition; the first index information comprises a first correspondence and a second correspondence for M stored pieces of data, wherein the first correspondence represents the one-to-one correspondence between N index keys generated on the basis of the M pieces of data and N groups of the internal data identification, and the second correspondence represents the one-to-one correspondence between M row primary keys generated on the basis of the M pieces of data and M internal data identifications of the M pieces of data. Therefore, the efficiency of querying data may be effectively improved.