Android SQL错误代码1（靠近“0”）&引用；

我正试图用这个语句在我的Android应用程序中编写这个查询

 public void syncflavorcount() {

    mDb.execSQL("UPDATE " +DATABASE_TABLE2+ " SET COUNT = (SELECT SUM(c)" +
            " FROM ("+
            "SELECT COUNT(*) AS c FROM " +DATABASE_TABLE+ " WHERE " +DATABASE_TABLE2+ ".flv1name = " +DATABASE_TABLE2+ ".name "+
            " UNION ALL "+
            " SELECT COUNT(*) FROM " +DATABASE_TABLE+ " WHERE " +DATABASE_TABLE2+ ".flv2name = " +DATABASE_TABLE2+ ".name "+
            " UNION ALL "+
            " SELECT COUNT(*) FROM " +DATABASE_TABLE+ " WHERE " +DATABASE_TABLE2+ ".flv3name = " +DATABASE_TABLE2+ ".name)");
}

它很好，但是当它运行时，我得到了这个错误

      Error Code : 1 (SQLITE_ERROR)
      Caused By : SQL(query) error or missing database.
      (near ")": syntax error (code 1): , while compiling: UPDATE flavors  SET COUNT = (SELECT SUM(c) FROM (SELECT COUNT(*) AS c FROM recipes WHERE flavors.flv1name = flavors.name  UNION ALL  SELECT COUNT(*) FROM recipes WHERE flavors.flv2name = flavors.name  UNION ALL  SELECT COUNT(*) FROM recipes WHERE flavors.flv3name = flavors.name))

我不知道这是为什么。该语句只有两个开括号。有人能帮我查一下吗。或者帮我把这句话写出来

预期的输出应该是DATABASETABLE2的列名计数将更新为DATABASETABLE的列名flv1name的计数。。。flv3name，其中来自flv1name的条目。。。flv3name等于DATABASETABLE2的名为name的列

    DATABASETABLE2

    name    other columns      count
    Apple   ...                1
    Berry   ...                3
    Cherry  ...                0
    ...     ...                ...

---

内部查询可能需要别名

根据@Jens的评论，您在

设置计数=（

---

COUNT=（

结尾处缺少结束括号感谢这一错误的帮助，但现在我有了另一个更复杂的错误。感谢这一错误的帮助，但现在我有了另一个更复杂的错误。（“FROM”附近）：语法错误（代码1）：“有了所有的FROM，我想它是来自声明中的第一个FROM。

public void syncflavorcount() {
    mDb.execSQL("UPDATE " +DATABASE_TABLE2+ " SET COUNT = (SELECT SUM(c)" +
            " FROM ("+
            "SELECT COUNT(*) AS c FROM " +DATABASE_TABLE+ " WHERE " +DATABASE_TABLE2+ ".flv1name = " +DATABASE_TABLE2+ ".name "+
            " UNION ALL "+
            " SELECT COUNT(*) FROM " +DATABASE_TABLE+ " WHERE " +DATABASE_TABLE2+ ".flv2name = " +DATABASE_TABLE2+ ".name "+
            " UNION ALL "+
            " SELECT COUNT(*) FROM " +DATABASE_TABLE+ " WHERE " +DATABASE_TABLE2+ ".flv3name = " +DATABASE_TABLE2+ ".name) as myTable)");
}