1. A method for building indices for a time sequence in a time series database, comprising: dividing, using a processing device, a time sequence in the time series database into a plurality of subsequences based on a sliding window; building spatial indices for the plurality of subsequences, the spatial indices being used for defining spatial locations of subsequences in the plurality of subsequences in the time sequence; and building content indices for the plurality of subsequences, the content indices being used for defining content ranges of subsequences in the plurality of subsequences.