We conducted an extensive search for high dielectrics over a set of ternary oxides by combining crystal structure prediction and density functional perturbation theory calculations. The input files containing important parameters and calculation results are stored in a JSON file. For each material, one can check the properties by accessing values through keys, such as "e poly", "e total" and "e electronic", corresponding to polycrystalline dielectric, total dielectric tensor and electronic contribution tensor, respectively (referred to Table 1). Other parameters can be found by accessing the “meta” key as listed in Table 2.