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MySQL views the SQL statement details executed by the optimizer

2022-04-23 05:00:00 【GreatorMan】

         In some complex applications , We don't know what we wrote SQL Whether to carry out as we think and as we think of the implementation plan , However, we can analyze the commands to see the results after the optimizer SQL;

EXPLAIN 
	EXTENDED
SELECT * FROM demo INNER JOIN WHERE id= 394427013860954112 OR id =5
;
SHOW WARNINGS;

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