SQL SELECT
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Internal
Overview
Upon execution, an SQL query returns a result set.
Query execution. SQL optimizer. Subqueries.
SELECT FROM WHERE GROUP BY HAVING ORDER BY
Select all (possibly across multiple tables) then filter and discard with where.
Example
SELECT id, name FROM person WHERE id = 1;
Clauses
SELECT
FROM
FROM permanent|derived|temporary|virtual(view)
Table alias.
Querying Multiple Tables
WHERE
GROUP BY ... HAVING
(make sure I understand thoroughly and link)