什么是实数和虚数

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select * from tbl_Articles WHERE ArticleID=163053 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=163053 LIMIT 0,1
select * from tbl_Articles_sphinx where id=163053 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1074865,1078392,1079429,1076111,1073025,980827,1102388,1110157,1062346,1065019,1065361,1102666,1071265,1100033,1080241,1048112,1070498,1126571,1111820,1113692,1064977,1063929,1097325,1103532,1073437,1109669,1122160,1120418,1077348,1075688) ORDER BY field (ArticleID,1074865,1078392,1079429,1076111,1073025,980827,1102388,1110157,1062346,1065019,1065361,1102666,1071265,1100033,1080241,1048112,1070498,1126571,1111820,1113692,1064977,1063929,1097325,1103532,1073437,1109669,1122160,1120418,1077348,1075688)