SQL>select * from v$version;

BANNER
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Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - 64bit Production
PL/SQL Release 11.1.0.6.0 - Production
CORE    11.1.0.6.0      Production
TNS for 64-bit Windows: Version 11.1.0.6.0 - Production
NLSRTL Version 11.1.0.6.0 - Production

5 rows selected.

SQL>desc approved_links;
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 APPROVAL_PK                               NOT NULL NUMBER
 MASTER_LINK_FK                                     NUMBER
 CHILD_LINK_FK                                      NUMBER
 ENGINE_FK                                 NOT NULL NUMBER(3)
 RANK                                               NUMBER
 CREATED_BY_FK                             NOT NULL NUMBER
 CREATED_ON                                NOT NULL TIMESTAMP(6)
 LAST_LOGIN_FK                             NOT NULL NUMBER
 LAST_MODIFIED                             NOT NULL TIMESTAMP(6)
 LAST_MC                                   NOT NULL VARCHAR2(50)
 LAST_IP                                   NOT NULL VARCHAR2(20)