请你简述一下九章算术的主要内容

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select * from tbl_Articles WHERE ArticleID=2486852 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2486852 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2486852 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1085995,1093923,1100799,1078903,1044735,1097815,1065928,1050647,1108219,1114236,1087485,1119007,1103287,1070292,1083059,1108990,1114222,1101929,1095578,1049670,1078725,1086498,1067966,1090032,1110067,1086194,1100537,1069045,1070963,1112336) ORDER BY field (ArticleID,1085995,1093923,1100799,1078903,1044735,1097815,1065928,1050647,1108219,1114236,1087485,1119007,1103287,1070292,1083059,1108990,1114222,1101929,1095578,1049670,1078725,1086498,1067966,1090032,1110067,1086194,1100537,1069045,1070963,1112336)