Question

I have one query that I have below two tables ..

CREATE table "EMPLOYEE" (
    "EMP_ID"     NUMBER,
    "ENAME"      VARCHAR2(4000),
    "SALARY"     VARCHAR2(4000),
    "COMPANY"    VARCHAR2(4000),
    "CONTACTNO." NUMBER,
    "GENDER"     CHAR(100),
    constraint  "EMPLOYEE_PK" primary key ("EMP_ID")
)

CREATE TABLE  "DEPARTMENT" 
(   
    "DEPT_ID" NUMBER, 
    "DEPT_NAME" VARCHAR2(4000), 
    "LOCATION" VARCHAR2(4000), 
    "CONTACTNO." NUMBER, 
     CONSTRAINT "DEPARTMENT_PK" PRIMARY KEY ("DEPT_ID") ENABLE
)

Now what will be the output If I write select * from EMPLOYEE,DEPARTMENT

Answer 1

With only a schema, nothing. If the tables had data, you’d get a cross-join of everything in each table.