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delete P1.* from `t1` AS P1 INNER JOIN (SELECT aaa FROM `t1` GROUP BY N HAVING Count(M) > 1) AS p2 ON P1.N = p2.N;
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ERROR 42S22: Unknown column 'aaa' in 'field list'
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OBJECTID int NOT NULL default 0,
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SORTORDER int NOT NULL auto_increment,
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KEY t1_SortIndex (SORTORDER),
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KEY t1_IdIndex (OBJECTID)
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UNIQUE KEY t2_ID_IDX (ID),
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INSERT INTO t2 VALUES (1000,0),(1001,0),(1002,0),(1003,0),(1008,1),(1009,1),(1010,1),(1011,1),(1016,2);
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DATA decimal(10,2) default NULL,
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UNIQUE KEY t3_ID_IDX (ID)