对于网络的理解有哪些

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select * from tbl_Articles WHERE ArticleID=223672 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=223672 LIMIT 0,1
select * from tbl_Articles_sphinx where id=223672 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1065303,1071661,1125283,977420,1086872,1055694,1085062,1088670,1091229,1083421,1052425,1057710,1088586,1091442,1090537,1046866,1063825,1079546,1065281,1064861,1113790,1086612,1055526,1065381,964762,1044609,1081255,1090621,1049670,1073899) ORDER BY field (ArticleID,1065303,1071661,1125283,977420,1086872,1055694,1085062,1088670,1091229,1083421,1052425,1057710,1088586,1091442,1090537,1046866,1063825,1079546,1065281,1064861,1113790,1086612,1055526,1065381,964762,1044609,1081255,1090621,1049670,1073899)