Dear list,
As you already know, there are different ways to retrieve a record-set
from a database. For example, here's the classic way to perform this in PHP:
while ($row = mysql_fetch_assoc($db)) {
// my row is available here
}
Speacking about PHP internals, what exactly happens here?
1) The PHP asks the Database-Layer to give a record in each while pass?
I mean the record-set is not available in PHP's memory, but in MySQL's Mem.
2) Or the database-layer has gave the whole result-set to PHP, and we're
just fetching a single row from PHP's memory?
3) Finally, what is the efficient way to retrieve thousands or records which
need to be processed at once? Using LIMIT?
Kind regards,
-behzad
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