Question

I have two table in two different database.

1. Kalix2 –>I have one table ph_Companies
2. Asterisk–> Here I have table called cdr.

In ph_Companies I am having CompanyName column and company name is in this format.

   CompanyName
  AccuWebHosting

In other table I am having another column clid which stores the company name in the following format.

    clid
   "AccuWebHosting-EN" <6618083563> 

Now, my question is how can I make join between these two table based on this column. In both the table these are the only column which is having some common data. No other column is having similar data.

Please help me. Thanks in advance.

Answer 1

SELECT  a.*, b.*
FROM    ph_Companies a
        INNER JOIN otherTable b
            ON b.clid LIKE CONCAT('%', a.CompanyName, '%')

Caution, this query is very slow if you want large database because it requires a FullTable Scan. The reason is you have “bad” schema design. I’ll recommend you to alter the tables like this,

CREATE TABLE ph_Companies
(
    ID INT PRIMARY KEY,
    CompanyName VARCHAR(20),
    -- OTHER COLUMNS HERE
);

CREATE TABLE otherTable 
(
    ID INT AUTO_INCREMENT PRIMARY KEY,
    CompanyID INT,
    CompanyName VARCHAR(20),
    clid VARCHAR(50),
    -- OTHER COLUMNS HERE
    CONSTRAINT tb_fk FOREIGN KEY (CompanyID)
        REFERENCES ph_Companies (ID)
);

and you will have a query like this,

SELECT  a.*, b.*
FROM    ph_Companies a
        INNER JOIN otherTable b
            ON a.ID = b.CompanyID

which is FAR more better than the query above.