drop table venasiento;
create table venasiento(
COD_CIA                         CHAR(3) NOT NULL, 
SUCURSAL                        CHAR(3) NOT NULL, 
TIP_DOC                         CHAR(3) NOT NULL, 
COD_MONEDA                      VARCHAR2(3)  NOT NULL,
TIP_CAMBIO                      NUMBER(14,4) NOT NULL,
TIP_CAMBIOBASE                  NUMBER(14,4) NOT NULL,
COD_CTA                         VARCHAR2(25) NOT NULL, 
CCOSTO                          VARCHAR2(7)  NOT NULL, 
DEBITOS                         NUMBER(14,2) NOT NULL, 
CREDITOS                        NUMBER(14,2) NOT NULL,
USUARIO                         VARCHAR2(30) NOT NULL
);




