| Siebel Data Quality Administration Guide > Siebel Data Quality Concepts >  Data Model for the SDQ Matching Server
 This topic provides information about the database tables that the SDQ Matching Server interacts with. Table 4 lists the tables that are relevant to data matching. Table 5 lists the database operations that result from the various data matching functions. 
Table 4.	Tables Used by SDQ Matching Server 
    |  | Usage by SDQ Matching Server |  
    | S_CONTACT | Stores contact records. |  
    | S_DEDUP_RESULT | Stores the results of data matching. The following fields are of interest: 
DUP_OBJ_ID field. Stores the row ID of a potential duplicate record.
OBJ_ID field. Stores the row ID of the master record (the record for which matching was performed).
OBJ_NAME field. Stores the name of the business component for which data matching was performed, for example, Account.
TOT_SCORE_VAL field. Stores the match score of the potential duplicate record.
 |  
    | S_ORG_DEDUP_KEY | Stores match keys for account records. |  
    | S_ORG_EXT | Stores account records. |  
    | S_PER_DEDUP_KEY | Stores match keys for contact records. |  
    | S_PRSP_CONTACT | Stores prospective contact records. |  
    | S_PRSP_DEDUPKEY | Stores match keys for prospective contact records. |  
 
Table 5.	Database Operations Resulting from SDQ Matching Functions
    |  |  |  
    | Key Generation or Key Refresh | 
Data creation in one of the following tables:
S_ORG_DEDUP_KEY (Account records)
S_PER_DEDUP_KEY (Contact records)
S_PRSP_DEDUPKEY (List Mgmt Prospective Contact records)
Data update in one of the following tables:
 |  
    | Matching (DeDuplication) | 
Data lookup in one of the following tables:
S_ORG_DEDUP_KEY (Account records)
S_PER_DEDUP_KEY (Contact records)
S_PRSP_DEDUPKEY (List Mgmt Prospective Contact records)
Data creation in the S_DEDUP_RESULT table
Data update in one of the following tables:
 |  
    | Merging | 
Data deletion in the S_DEDUP_RESULT table
Data update and deletion in one of the following tables:
S_CONTACT (Contact records)
S_ORG_EXT (Account records)
S_PRSP_CONTACT (List Mgmt Prospective Contact records)
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