4. The method according to claim 1 , wherein importing the entity in the E-R model data file based on the determined dependency type further includes: responsive to the determined dependency type of the entity being weak correlation, recording weak correlation reference information of the entity in a weak correlation table.
4. The method according to claim 1 , wherein importing the entity in the E-R model data file based on the determined dependency type further includes: responsive to the determined dependency type of the entity being weak correlation, recording weak correlation reference information of the entity in a weak correlation table. 5. The method according to claim 4 , wherein correspondingly importing the entity in the E-R model data file based on the determined dependency type further comprises: determining whether the imported entity with no correlation or weak correlation affects an entity recorded in a strong correlation table; responsive to the determination that the imported entity with no correlation or weak correlation affects an entity recorded in a strong correlation table, importing the entity recorded in the strong correlation table and deleting the entity recorded in the strong correlation table from the strong correlation table.