请问个语句优化：有四个表tab1,tab2(是tab1的详情表),tab3,tab4(tab3的详情表),
select a.*,b.content,c.title,d.cominfo from tab1 as a left join tab2 as b on a.pid=b.pid left join tab3 as c on a.cid=c.cid left join tab4 as d on c.cid=d.cid where a.pid in(5,8,9,17,12,16,2,59)
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建议对数据库优化，这句没有多大的优化价值