请问旁通管的作用是什么

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select * from tbl_Articles WHERE ArticleID=182525 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=182525 LIMIT 0,1
select * from tbl_Articles_sphinx where id=182525 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1097147,1084703,1087351,1077960,1104195,1107022,1089508,1093290,1120418,1074184,1085388,1075859,1062712,1088479,1096388,988905,1049344,997640,1108668,2451048,1068118,1077370,1078438,1090561,1079942,1126262,1076537,1108976,1066704,1092315) ORDER BY field (ArticleID,1097147,1084703,1087351,1077960,1104195,1107022,1089508,1093290,1120418,1074184,1085388,1075859,1062712,1088479,1096388,988905,1049344,997640,1108668,2451048,1068118,1077370,1078438,1090561,1079942,1126262,1076537,1108976,1066704,1092315)