On 3 Dec 2019, at 8:48am, Jonathan Moules <[email protected]> wrote:
> SELECT
> count(1)
> FROM
> data_table
> JOIN joining_table USING (data_id);
SELECT
count(1)
FROM data_table
JOIN joining_table
ON joining_table.data_id = data_table.data_id;
Given the rest of the structure you gave, including the indexes, compare the
speeds of these two.
Simon
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