CREATE TABLE T_INVOICE (ID NUMBER(10) NOT NULL, INVOICE_NO VARCHAR2(30) NOT NULL, CONSTRAINT PK_INVOICE_ID PRIMARY KEY(ID)); CREATE TABLE T_INVOICE_DETAIL (ID NUMBER(10) NOT NULL, AMOUNT NUMBER(10,3), PIECE NUMBER(10), INVOICE_ID NUMBER(10), CONSTRAINT PK_DETAIL_ID PRIMARY KEY(ID)); ALTER TABLE T_INVOICE_DETAIL ADD CONSTRAINT FK_INVOICE_ID FOREIGN KEY(INVOICE_ID ) REFERENCES T_INVOICE(ID);
ALTER TABLE T_INVOICE_DETAIL ADD CONSTRAINT FK_INVOICE_ID FOREIGN KEY(INVOICE_ID ) REFERENCES T_INVOICE(ID) ON DELETE CASCADE;
ALTER TABLE T_INVOICE_DETAIL ADD CONSTRAINT FK_INVOICE_ID FOREIGN KEY(INVOICE_ID ) REFERENCES T_INVOICE(ID) ON DELETE SET NULL;
ALTER TABLE T_INVOICE_DETAIL ADD CONSTRAINT FK_INVOICE_ID FOREIGN KEY(INVOICE_ID ) REFERENCES T_INVOICE;
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