Answer 1

--To create a table

CREATE TABLE TABLE_NAME (COL_NAME COL_DATATYPE );
--You can add as many column as you need.

INSERT INTO TABLE_NAME VALUES(VALUE1, VALUE2);

--number of values should be equal to number of columns.
--You can leave the columns which accepts null, empty.

-- this is to add a column.
ALTER TABLE TABLE_NAME ADD ROW_NAME ROW_DATATYPE;