sql - is below mysql Query cause huge load on server -


hi have executed below query 

select a.* table1 a, table2 b a.x!=b.x;

as server hang not able provide exact structure of both tables. server having huge load.

table1 has no indexes , table 2 has index on x.

i have explain output similar query.

select a.* table1 a, table2 b a.x!=b.x; +----+-------------+-------+--------+---------------+-------+---------+----------------+-------+-------+ | id | select_type | table | type   | possible_keys | key   | key_len | ref            | rows  | | +----+-------------+-------+--------+---------------+-------+---------+----------------+-------+-------+ |  1 | simple      | b     |    | null          | null  | null    | null           | 70503 |       | |  1 | simple      |     | eq_ref | email         | email | 386     | asp_db.b.email |     1 |       | +----+-------------+-------+--------+---------------+-------+---------+----------------+-------+-------+ 2 rows in set (0.00 sec)

please can 1 in regrading this...

table1 has 69264 rows , table2 has 3332349 rows , mysql query

think want select. far say: give me records of table1 , each of these records non-matching records of table2 (i.e. id not match). give hundreds of millions of rows.


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