插叙在文中起的作用是什么

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select * from tbl_Articles_data WHERE ArticleID=2931385 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2931385 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1114510,1099679,524411,597397,3108368,1104547,613400,416439,1089002,2618210,1091719,370901,604308,1111354,1106623,1105725,487341,1303912,537634,1115406,1097001,1113816,1103394,1117085,1091920,1097857,1115811,406695,500682,1090356) ORDER BY field (ArticleID,1114510,1099679,524411,597397,3108368,1104547,613400,416439,1089002,2618210,1091719,370901,604308,1111354,1106623,1105725,487341,1303912,537634,1115406,1097001,1113816,1103394,1117085,1091920,1097857,1115811,406695,500682,1090356)