Android &引用；SQLite管理器查询错误“；

我想从一个表更新另一个表的列

UPDATE tbl_relations SET tbl_relations.WANTED = table_wanted.WANTED FROM table_wanted , tbl_relations  WHERE table_wanted.M_V_NO = tbl_relations.M_V_NO

SQLite管理器中的错误消息为

near ".": syntax error: 

尝试以下方法（在SQLite中使用假数据对我有效）：

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希望有帮助。

请查看INSERT命令的语法树：

UPDATE tbl_relations
SET tbl_relations.WANTED = (SELECT w.WANTED 
                            FROM table_wanted w
                            WHERE w.M_V_NO = tbl_relations.M_V_NO) 
    WHERE tbl_relations.M_V_NO IN (SELECT w.M_V_NO
                                   FROM table_wanted w 
                                   WHERE w.M_V_NO = tbl_relations.M_V_NO)