请问尾戒代表什么含义

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select * from tbl_Articles WHERE ArticleID=3414786 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3414786 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3414786 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1109933,1096166,1113117,1129101,1128779,1005389,1105221,1123209,1128133,1116873,1124430,1120360,1125071,1116005,1126346,1124125,1128907,1128123,1120976,1126510,1065867,1104270,1124029,1120735,1121010,1129093,1115373,1008790,1128879,1104665) ORDER BY field (ArticleID,1109933,1096166,1113117,1129101,1128779,1005389,1105221,1123209,1128133,1116873,1124430,1120360,1125071,1116005,1126346,1124125,1128907,1128123,1120976,1126510,1065867,1104270,1124029,1120735,1121010,1129093,1115373,1008790,1128879,1104665)