系统误差可分为哪四种

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select * from tbl_Articles WHERE ArticleID=570591 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=570591 LIMIT 0,1
select * from tbl_Articles_sphinx where id=570591 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1501924,1879426,2194386,2056424,748180,1940131,1074708,2014180,3369302,175950,2529136,1129395,222786,637645,2304341,1124963,251944,1805359,755018,471308,1546205,2470889,1441014,1926186,2189978,2961832,2473050,1096687,1294677,2059864) ORDER BY field (ArticleID,1501924,1879426,2194386,2056424,748180,1940131,1074708,2014180,3369302,175950,2529136,1129395,222786,637645,2304341,1124963,251944,1805359,755018,471308,1546205,2470889,1441014,1926186,2189978,2961832,2473050,1096687,1294677,2059864)