即和既的区别如何区分这两个字

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select * from tbl_Articles WHERE ArticleID=2539690 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2539690 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2539690 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1055920,1081969,1048236,1091362,1127705,1129005,1056384,1068774,1053584,1095646,1077104,1092690,1063181,1095700,1067910,1054388,1069389,1099553,1086498,1059016,1127505,1089040,1093657,1126912,1068536,1070668,1044565,1068830,1091304,1073820) ORDER BY field (ArticleID,1055920,1081969,1048236,1091362,1127705,1129005,1056384,1068774,1053584,1095646,1077104,1092690,1063181,1095700,1067910,1054388,1069389,1099553,1086498,1059016,1127505,1089040,1093657,1126912,1068536,1070668,1044565,1068830,1091304,1073820)