一分一段表是什么意思

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select * from tbl_Articles WHERE ArticleID=1024702 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1024702 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1024702 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(379406,1110211,1106320,1093811,3120012,1098475,1110682,1104161,362295,87052,781935,410190,1111360,1105429,1112448,1089594,369539,2247904,1099443,1100292,1099323,381519,1120416,1116952,1087769,1100262,1116924,1104183,379658,1105922) ORDER BY field (ArticleID,379406,1110211,1106320,1093811,3120012,1098475,1110682,1104161,362295,87052,781935,410190,1111360,1105429,1112448,1089594,369539,2247904,1099443,1100292,1099323,381519,1120416,1116952,1087769,1100262,1116924,1104183,379658,1105922)