n个点最多可确定几条直线

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select * from tbl_Articles WHERE ArticleID=2784580 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2784580 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2784580 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(2335166,1086582,1092139,1357992,359015,190968,1127187,1297654,1113556,1083180,270365,3417106,1127831,438821,1275834,1062362,3205535,1091358,1546365,1061938,3135293,3348692,1093379,3418579,1128469,1901106,2337318,1111640,1103342,1305172) ORDER BY field (ArticleID,2335166,1086582,1092139,1357992,359015,190968,1127187,1297654,1113556,1083180,270365,3417106,1127831,438821,1275834,1062362,3205535,1091358,1546365,1061938,3135293,3348692,1093379,3418579,1128469,1901106,2337318,1111640,1103342,1305172)