CREATE TABLE PLOBJ
   (	"POID" NUMBER NOT NULL , 
	"PONAME" VARCHAR2(20 BYTE), 
	"WPID" NUMBER, 
	"PROJID" NUMBER, 
	"WFID" NUMBER, 
	"BASELINESTDT" DATE, 
	"BASELINEENDDT" DATE, 
	"FORECASTSTDT" DATE, 
	"FORECASTENDDT" DATE, 
	"ACTUALSTDT" DATE, 
	"ACTUALENDDT" DATE, 
	"PLANNEDSTDT" DATE, 
	"PLANNEDENDDT" VARCHAR2(20 BYTE), 
	"POTEMID" NUMBER);

INSERT INTO PLOBJ VALUES(1,'PO1',1,1,1,'25-FEB-15',NULL,NULL,NULL,'25-FEB-15',NULL,NULL,NULL,1);

 CREATE TABLE "RULE_POT_GDF" 
   (	"PROJECTID" NUMBER(5,0), 
	"POTEMID" NUMBER(5,0), 
	"LGDF_COL" VARCHAR2(20 BYTE), 
	"OPERATORID" VARCHAR2(5 BYTE), 
	"RGDF_COL" VARCHAR2(20 BYTE), 
	"EMAILADDRESS" VARCHAR2(30 BYTE), 
	"RVALUE" NUMBER(5,0)
   );


INSERT INTO RULE_POT_GDF VALUES(1,1,'BASELINESTDT','=','ACTUALSTDT',tt@gmail.com, null);	

POTEMID column is relationship between two tables.

In RULE_POT_GDF table LGDF_COL and  RGDF_COL values may get BASELINESTDT, ACTUALSTDT, BASELINEENDDT etc which are column names of  PLOBJ table.

I would like to retrieve the column data from plobj table based on the colum value from RULE_POT_GDF table;