Create additional CDS entities and a view

Back in the development perspective, open the existing Core Data Services file in Code Editor mode:

You will reuse the existing file to add two more tables and a view.

Replace the existing code with following code into the editor to create two additional entities:

context PO {

    entity APPROVAL_STATUS {
        ID   : String(1);
        TEXT : String(200);
    };

    entity HEADER {
        key PURCHASEORDERID : String(10) not null;
            CURRENCY        : String(5);
            GROSSAMOUNT     : Decimal(15, 2);
            NETAMOUNT       : Decimal(15, 2);
            APPROVALSTATUS  : String(1);
    };


    entity ITEM {
        key PURCHASEORDERID   : String(10) not null;
        key PURCHASEORDERITEM : String(10) not null;
            PRODUCTID         : String(10);
            CURRENCY          : String(5);
            GROSSAMOUNT       : Decimal(15, 2);
            NETAMOUNT         : String(10);
            QUANTITY          : Decimal(5, 2);
            QUANTITYUNIT      : String(5);
    };

     define view PO_VIEW as
        select from HEADER join APPROVAL_STATUS as A on "A"."ID" = "HEADER"."APPROVALSTATUS"
        {
            "HEADER"."PURCHASEORDERID" as "PURCHASEORDERID",
            "HEADER"."APPROVALSTATUS" as "APPROVALSTATUS",
            "HEADER"."GROSSAMOUNT" as "GROSSAMOUNT",
            "HEADER"."CURRENCY" as "CURRENCY",
            "A"."TEXT" as "TEXT"
        };
};

As follows:

Save and Build the database module.

You will now use plain SQL to load data into your newly created entities. Copy the following code in the SQL console you left open from the database explorer:

INSERT INTO "DB_1"."PO.HEADER" VALUES('1000','USD',1704.22,1297.88,'A');
INSERT INTO "DB_1"."PO.HEADER" VALUES('1001','USD',184.39,1862.61,'A');
INSERT INTO "DB_1"."PO.HEADER" VALUES('1002','USD',1588.3,147.53,'R');
INSERT INTO "DB_1"."PO.HEADER" VALUES('1003','USD',178.14,485.68,'I');
INSERT INTO "DB_1"."PO.HEADER" VALUES('1004','USD',869.59,652.36,'I');
INSERT INTO "DB_1"."PO.HEADER" VALUES('1005','USD',1671.67,624.85,'A');

INSERT INTO "DB_1"."PO.ITEM" VALUES('1000','1','PC_1001','USD',1657.7,193.38,2,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1001','1','HR_1232','USD',240.96,1964.76,5,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1002','1','IT_8456','USD',1678.83,1156.55,1,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1003','1','BO_5423','USD',136.45,212.50,1,'KG');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1004','1','PI_3721','USD',1108.46,1283.65,3,'KG');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1005','1','CC_3526','USD',581.84,1678.54,4,'LB');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1000','2','PROD1','USD',1241.95,1679.88,1,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1001','2','PROD1','USD',1490.50,460.70,5,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1002','2','PROD1','USD',318.25,7.15,4,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1003','2','PROD1','USD',311.75,152.29,1,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1004','2','PROD1','USD',664.58,864.91,5,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1005','2','PROD1','USD',1174.65,216.97,1,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1000','3','PRID2','USD',1839.9,1425.12,4,'M');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1001','3','PRID3','USD',1344.18,1838.52,3,'M');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1002','3','PRID4','USD',1109.49,950.91,1,'EA');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1003','3','PRID5','USD',570.36,1804.31,1,'LB');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1004','3','PRID6','USD',38.5,1874.59,2,'KG');
INSERT INTO "DB_1"."PO.ITEM" VALUES('1005','3','PRID7','USD',1145.66,126.50,2,'G');

Click on the Run button: