时差是如何产生的

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select * from tbl_Articles_data WHERE ArticleID=2782576 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2782576 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1097815,1132149,1054942,1056384,988780,1117980,1057064,1055824,1128351,993285,1079051,1085376,1049946,1132883,1120829,1063417,1056152,1066888,998502,3417693,1041271,1066852,1128045,1046963,1048406,1065773,1059515,1053494,1079950,1052952) ORDER BY field (ArticleID,1097815,1132149,1054942,1056384,988780,1117980,1057064,1055824,1128351,993285,1079051,1085376,1049946,1132883,1120829,1063417,1056152,1066888,998502,3417693,1041271,1066852,1128045,1046963,1048406,1065773,1059515,1053494,1079950,1052952)