iso当中4个核心指的是什么

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select * from tbl_Articles WHERE ArticleID=562026 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=562026 LIMIT 0,1
select * from tbl_Articles_sphinx where id=562026 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1106142,1094219,1064085,1071199,1095223,1060887,1067027,1071701,1073399,1052599,1067803,1048610,1078134,1112114,1104847,1086290,1062716,1063735,1050369,1046706,1069271,1110608,1068150,3030228,1066812,1055341,1112901,1078194,999794,1125544) ORDER BY field (ArticleID,1106142,1094219,1064085,1071199,1095223,1060887,1067027,1071701,1073399,1052599,1067803,1048610,1078134,1112114,1104847,1086290,1062716,1063735,1050369,1046706,1069271,1110608,1068150,3030228,1066812,1055341,1112901,1078194,999794,1125544)