什么是倒顺开关

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select * from tbl_Articles WHERE ArticleID=226337 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=226337 LIMIT 0,1
select * from tbl_Articles_sphinx where id=226337 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1126571,980715,1053684,1076541,1099175,1091199,1089454,1092724,1080593,1056858,1067017,1073588,1072713,1059368,1051283,1102388,1042765,1084083,1099819,1106599,1115821,1092308,1099203,1073526,1121052,1005452,1500507,1106142,1105591,1297501) ORDER BY field (ArticleID,1126571,980715,1053684,1076541,1099175,1091199,1089454,1092724,1080593,1056858,1067017,1073588,1072713,1059368,1051283,1102388,1042765,1084083,1099819,1106599,1115821,1092308,1099203,1073526,1121052,1005452,1500507,1106142,1105591,1297501)