sql hint article

unnest, no_ununest, push_subq --- sub query

push_pred, merge, no_merge --- views

http://bbs.chinabyte.com/thread-357284-1-1.html

sql 性能变差原因及办法:

http://www.laoxiong.net/how-keeping-sql-plan-stability.html

recovery :

http://xuqingwei.itpub.net/post/37188/500757

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