如何计算丝锥的使用寿命

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select * from tbl_Articles WHERE ArticleID=2472177 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2472177 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2472177 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1103602,1095424,1107118,1058958,1108640,1107997,1087805,1046928,1060911,1091177,1082363,1069159,1097823,1089522,1103287,1058843,1055678,901464,1084667,1070967,1069389,1090771,1084829,1047441,1112632,1053584,999216,987892,1096817,1079255) ORDER BY field (ArticleID,1103602,1095424,1107118,1058958,1108640,1107997,1087805,1046928,1060911,1091177,1082363,1069159,1097823,1089522,1103287,1058843,1055678,901464,1084667,1070967,1069389,1090771,1084829,1047441,1112632,1053584,999216,987892,1096817,1079255)