Question

I have two tables, ta and tb:

ta:

key col1  
--------
k1 a 
k2 c 

tb:

key col2  
-------
k2 cc 
k3 ee 

They connected by “key”. I want to know how can I get a table, tc, like:

key col1 col2  
-------------
k1 a  
k2 c cc 
k3  ee

Is there a easy method instead of inserting every record? They are one million records of tables so I need an effective way.

Answer 1

Make a VIEW of the two tables. Write a SELECT ... JOIN statement that gives you the result you want, and then use that as the base for a VIEW.

Example:

CREATE VIEW
  database.viewname
AS
  SELECT
    ta.key, 
    ta.col1,
    tb.col2
  FROM
    ta
   LEFT JOIN
    tb
   USING(key)