Внутр. накладная
CREATE TABLE WAYBILL (
ID INTEGER NOT NULL,
W_DATE DATE NOT NULL,
W_ID_FROM INTEGER DEFAULT  0  NOT NULL,
W_N_NAKL INTEGER DEFAULT  0  NOT NULL,
W_ID_TO SMALLINT DEFAULT  0  NOT NULL,
W_COMMENTS VARCHAR( 100 ) CHARACTER SET WIN1251 COLLATE WIN1251);
спецификация к внутр накладной.
CREATE TABLE SPECIFIC_WAYBILL (
ID INTEGER NOT NULL,
S_N_NAKL INTEGER DEFAULT  0  NOT NULL,
S_ID_PROD INTEGER DEFAULT  0  NOT NULL,
S_KOL DECIMAL( 8 ,  2 ) DEFAULT  0  NOT NULL,
NUMBER SMALLINT DEFAULT  0  NOT NULL);

торговая накладная - 12 
CREATE TABLE SHIPMENT (
ID SMALLINT NOT NULL,
SHIP_DATE DATE NOT NULL,
SHIP_N_NAKL INTEGER,
SHIP_COMMENTS VARCHAR( 100 ) CHARACTER SET WIN1251 COLLATE WIN1251,
KONTRA_ID SMALLINT);
спецификация к ней
CREATE TABLE SPECIFIC_SHIPMENT (
ID SMALLINT NOT NULL,
S_N_NAKL SMALLINT DEFAULT  0  NOT NULL,
S_ID_PROD SMALLINT DEFAULT  0  NOT NULL,
S_KOL DECIMAL( 5 ,  2 ),
NUMBER SMALLINT,
NDS DECIMAL( 2 ,  1 ));