I think it is through Union, Join or Merge, but I am not sure... I tried googling it, but couldn't find relevant material...
Thanks in advance

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Adding a table and Joining tables are different.

When you want to join a table to other table, you can use the WHERE clause.
Example:

SELECT a.name, b.grade
FROM table1 a, table2 b
WHERE a.studInfo = b.studInfo;

*Base from my example above, I joined tables "table1" (a) and "table2" (b)

When you want to add a table...
CREATE TABLE tableName(Sample1 Varchar2(15), Sample2 char(3));

Add the PEOPLE table and THINGS table
CREATE TABLE People
(Name Varchar2(20),
Gender Char(1));
CREATE TABLE Things
(ProdName Varchar2(20),
ProdNum Varchar2(20));
COMMIT;

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