直线y=1的斜率是多少

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select * from tbl_Articles WHERE ArticleID=2123742 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2123742 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2123742 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1048878,1054388,1066804,1063867,1062670,1042658,1065019,1054934,1115001,1061796,1065749,1065928,1127819,1045911,1047441,1117662,1107687,1096338,1088906,992026,1305249,1061328,1095508,1048506,1064147,1057491,1054612,1061494,3029578,1068118) ORDER BY field (ArticleID,1048878,1054388,1066804,1063867,1062670,1042658,1065019,1054934,1115001,1061796,1065749,1065928,1127819,1045911,1047441,1117662,1107687,1096338,1088906,992026,1305249,1061328,1095508,1048506,1064147,1057491,1054612,1061494,3029578,1068118)