explain extended select j1.c1 from j1, j2, j3 where j1.c1 = j2.c1 and j3.c1 = j1.c1;
show warnings;
Read full article from EXPLAIN EXTENDED can tell you all kinds of interesting things - MySQL Performance Blog
show warnings;
Read full article from EXPLAIN EXTENDED can tell you all kinds of interesting things - MySQL Performance Blog
No comments:
Post a Comment