18. A non-transitory computer storage medium including at least one program for processing information when implemented by a processor, comprising: instruction for obtaining, at a front end, attribute information about a target field corresponding to data stored in one or more storage units at a back end, each storage unit corresponding to a respective query engine configured to execute a query operation in a language based on type information of the storage unit, the attribute information including a name of the target field; instruction for obtaining a table storing the target field according to the name of the target field and a preset corresponding relationship between the name of the target field and the table; instruction for obtaining data source information of a selected storage unit storing the target field based upon the obtained table, the data source information including a type serial number of the selected storage unit; instruction for obtaining the type information of the selected storage unit based upon the type serial number; instruction for obtaining attribute information about the target field described in a first language according to the type information about the selected storage unit; and instruction for sending the attribute information about the target field described in the first language to a query engine using the first language so that the query engine obtains data corresponding to the target field based upon the attribute information about the target field described in the first language.
19. The computer storage medium of claim 18 , wherein said instruction for obtaining the attribute information about the target field comprises: instruction for receiving attribute information about a candidate field described in a second language; instruction for parsing the attribute information about the candidate field described in the second language so as to obtain the attribute information about the candidate field; and instruction for removing attribute information about an incorrect candidate field from the attribute information about the candidate field so as to obtain the attribute information about the target field.