平均数和平均分有什么区别

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select * from tbl_Articles WHERE ArticleID=315511 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=315511 LIMIT 0,1
select * from tbl_Articles_sphinx where id=315511 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1077868,1048945,1048354,1066622,1067880,1069027,1065589,1076662,1041948,1062580,1065431,1001240,1070254,1049014,1072290,1076452,1075859,1071055,1132081,1077742,1070922,1074409,1068730,994629,1073076,1104133,1050455,1069707,1061798,1132115) ORDER BY field (ArticleID,1077868,1048945,1048354,1066622,1067880,1069027,1065589,1076662,1041948,1062580,1065431,1001240,1070254,1049014,1072290,1076452,1075859,1071055,1132081,1077742,1070922,1074409,1068730,994629,1073076,1104133,1050455,1069707,1061798,1132115)