Question

I have a simple table with two columns. The first field represents an id, the second one a name (string value). No field is unique. So, e.g., there are many records like:

What I need is a simple SQL statement which shows me the whole table in the following format and inserts the content into a new table.

Any help?

Answer 1

Just use COUNT function to count from_id. And if you want to count in group, use GROUP BY clause for that. Like this one.

SELECT `name`, COUNT(from_id) AS `COUNT`
FROM myTable 
GROUP BY `name`;

This will return your desired result.

Now you want to insert it into new table then you can do like this:

INSERT INTO newTable (`name`, `count`) 
SELECT `name`, COUNT(from_id) AS `COUNT`
    FROM myTable 
    GROUP BY `name`;