1/2的负一次方是多少?

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select * from tbl_Articles WHERE ArticleID=1705951 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1705951 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1705951 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1172621,892480,3498483,1828645,3488923,2179753,3245858,756315,3338641,2263038,1192072,911706,2195838,2796866,2287917,3464043,401079,459954,789012,767333,420440,692639,1184584,1017696,3118167,1487577,391743,387788,1203263,829291) ORDER BY field (ArticleID,1172621,892480,3498483,1828645,3488923,2179753,3245858,756315,3338641,2263038,1192072,911706,2195838,2796866,2287917,3464043,401079,459954,789012,767333,420440,692639,1184584,1017696,3118167,1487577,391743,387788,1203263,829291)