I'm using referential costraints in table creation.how to insert the value

Question

Hi,
This is the table Script.
CREATE TABLE Trn_Invest_DividendSU(
          DividendSU_ID               NUMBER(10)     DEFAULT 0,     
               DividendSU_LedgerType     CHAR(1)          DEFAULT ' ',
               DividendSU_EntryDate          DATE,     
               DividendSU_SU_Code          VARCHAR2(20)     DEFAULT ' ',     
               Scheme_Code           VARCHAR2(20) References Mst_Invest_Scheme(Scheme_Code),
               Share_Code           VARCHAR2(20) References Mst_Invest_Share(Share_Code),
               DividendSU_SchemeTypeID     NUMBER(4)     DEFAULT 0,
               InvstMaster_ID          NUMBER(4)     DEFAULT 0,
               DividendSU_DividentDate     DATE,     
               DividendSU_EligibleSU          NUMBER(10,5)     DEFAULT 0,
               DividendSU_NoSUTobe     NUMBER(10,5)     DEFAULT 0,
               DividendSU_AverageSU     NUMBER(10,5)     DEFAULT 0,
               DividendSU_Narration          VARCHAR2(300)     DEFAULT ' ',     
               DividendSU_BRVDate          DATE,     
               DividendSU_DividendSU     NUMBER(5,4)     DEFAULT 0,
               DividendSU_MJVStatus     CHAR(1)          DEFAULT ' ',
               DividendSU_TotalDividend     NUMBER(5,4)     DEFAULT 0,
               SalSU_Brokerage          NUMBER(3,2)     DEFAULT 0,
               SalSU_STT          NUMBER(4,6)     DEFAULT 0,
               DividendSU_RequestId     NUMBER(8)     DEFAULT 0,
               DividendSU_Timestamp     VARCHAR2(25)     DEFAULT ' '
ALTER TABLE Trn_Invest_DividendSU ADD (CONSTRAINT Trn_Inv_DivSU_DividendSUID_PK PRIMARY KEY (DividendSU_ID));
ALTER TABLE Trn_Invest_DividendSU ADD (CONSTRAINT Trn_Inv_DivSU_SchemeType_Id_FK FOREIGN KEY (DividendSU_SchemeTypeID) REFERENCES Mst_Invest_SchemeType (SchemeType_ID));
ALTER TABLE Trn_Invest_DividendSU ADD (CONSTRAINT Trn_Inv_DivSU_InvID_FK FOREIGN KEY (InvstMaster_ID) REFERENCES Mst_Invest_Master (InvstMaster_ID));
ALTER TABLE Trn_Invest_DividendSU ADD CONSTRAINT Check_Id2_FK check
((Scheme_Code Is Null and Share_Code Is Null) OR
(Scheme_Code Is Not Null and Share_Code Is Null) OR
(Scheme_Code Is Null and Share_Code Is Not Null));
Note:
Scheme_Code is primary key in Sheme Master
Share_Code is primary key in Share Master
SH01 is available in Share Master.but insert statement will not accept.
insert into TRN_Invest_DividendSU(DIVIDENDSU_ID,DIVIDENDSU_SU_CODE,SCHEME_CODE,SHARE_CODE) values (1,'SH01',null,null)
The Following will be coming
ORA-02291: integrity constraint (SBNPINV.TRN_INV_DIVSU_INVID_FK) violated - parent key not found
Pls very urgent.
Thanks,
V.Nagarajan

Answer 1

Hi,
I can not understand the need for this constraint excatly
ALTER TABLE Trn_Invest_DividendSU
ADD CONSTRAINT Check_Id2_FK check(
   (Scheme_Code Is Null and Share_Code Is Null) OR
   (Scheme_Code Is Not Null and Share_Code Is Null) OR
   (Scheme_Code Is Null and Share_Code Is Not Null)
);If I am reading it correctly, you do not want value for both Scheme_code and Share_code at the same time. Only one of the values should be present for a particular row.
If I read it correctly, then this constraint needs to be modified so that you can specify values for both these fields in your INSERT statement.
Thanks,
Ankur