寸是什么制中的长度单位

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select * from tbl_Articles_data WHERE ArticleID=1822602 LIMIT 0,1
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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1103420,1110732,1073528,1089454,1501819,1102814,1095307,1078797,1078100,1097097,997640,1074198,1121170,983947,1126198,1080593,1083170,1092113,1126912,1052739,1093829,1070764,1078903,1070922,1108668,1041559,1053752,1100723,1095992,1127992) ORDER BY field (ArticleID,1103420,1110732,1073528,1089454,1501819,1102814,1095307,1078797,1078100,1097097,997640,1074198,1121170,983947,1126198,1080593,1083170,1092113,1126912,1052739,1093829,1070764,1078903,1070922,1108668,1041559,1053752,1100723,1095992,1127992)