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INSERT INTO  ITEMAPPROVAL ( REQUESTITEMID,  USERID,  APPROVALSTATUS,  REQUESTSTATUSID,  ITEMAPPROVALDATE,  ITEMAPPROVALNOTE , APPROVEDAMOUNT)
                VALUES   ('132568', '15', '1', '4', TO_DATE('06/02/1436:10:6i:41a6', 'mm/dd/yyyy:hh:mi:ssam'), '' ,'20000');

Error starting at line : 23 in command -
INSERT INTO  ITEMAPPROVAL ( REQUESTITEMID,  USERID,  APPROVALSTATUS,  REQUESTSTATUSID,  ITEMAPPROVALDATE,  ITEMAPPROVALNOTE , APPROVEDAMOUNT)
                VALUES   ('132568', '15', '1', '4', TO_DATE('06/02/1436:10:6i:41am', 'mm/dd/yyyy:hh:mi:ssam'), '' ,'20000')

    Error report -
        SQL Error: ORA-01861: literal does not match format string
        01861. 00000 -  "literal does not match format string"
        *Cause:    Literals in the input must be the same length as literals in
                   the format string (with the exception of leading whitespace).  If the
                   "FX" modifier has been toggled on, the literal must match exactly,
                   with no extra whitespace.
        *Action:   Correct the format string to match the literal.

query = "INSERT INTO  ITEMAPPROVAL " +
                               "          ( REQUESTITEMID,  USERID,  APPROVALSTATUS,  REQUESTSTATUSID,  ITEMAPPROVALDATE,  ITEMAPPROVALNOTE , APPROVEDAMOUNT) " +
                               " VALUES   ('" + itemapproval.RequestItemID + "', '" + itemapproval.User.ID + "', '" + itemapproval.status + "', '" + itemapproval.requeststatus.ID + "', TO_DATE('" + itemapproval.date.ToString("mm/dd/yyyy:hh:mi:ssam") + "', 'mm/dd/yyyy:hh:mi:ssam'), '" + itemapproval.notes + "' ,'" + itemapproval.ApprovedAmount + "'); "

INSERT INTO  ITEMAPPROVAL ( REQUESTITEMID,  USERID,  APPROVALSTATUS,  REQUESTSTATUSID,  ITEMAPPROVALDATE,  ITEMAPPROVALNOTE , APPROVEDAMOUNT)
                VALUES   ('132568', '15', '1', '4', TO_DATE('06/02/1436:10:10:41am', 'mm/dd/yyyy:hh:mi:ssam'), '' ,'20000');

mm/dd/yyyy:hh:mm:ss.tt

query = "INSERT INTO  ITEMAPPROVAL " +
                               "          ( REQUESTITEMID,  USERID,  APPROVALSTATUS,  REQUESTSTATUSID,  ITEMAPPROVALDATE,  ITEMAPPROVALNOTE , APPROVEDAMOUNT) " +
                               " VALUES   ('" + itemapproval.RequestItemID + "', '" + itemapproval.User.ID + "', '" + itemapproval.status + "', '" + itemapproval.requeststatus.ID + "', TO_DATE('" + itemapproval.date.ToString("mm/dd/yyyy:hh:mi:ssam") + "', 'mm/dd/yyyy:hh:mm:sstt'), '" + itemapproval.notes + "' ,'" + itemapproval.ApprovedAmount + "'); "