SQLite 添加具有默认值的列

Question

我在Android SQLite数据库中工作。我正在将其从版本 1 升级到版本 2。onUpgrade方法按预期被调用。

我的代码：

sqLiteDatabase.execSQL("ALTER TABLE " + Contracts.DateActivities.TABLE_NAME + " ADD COLUMN " + Contracts.DateActivities.C_GROUP + " INTEGER DEFAULT 0;");

我不断收到相同的错误：

Caused by: android.database.sqlite.SQLiteException: near "group": syntax error (code 1): , while compiling: ALTER TABLE DateActivities ADD group INTEGER DEFAULT 0

我做错了什么？

我尝试过的其他变体：

sqLiteDatabase.execSQL("ALTER TABLE " + Contracts.DateActivities.TABLE_NAME + " ADD COLUMN " + Contracts.DateActivities.C_GROUP + " INTEGER DEFAULT 0;");
sqLiteDatabase.execSQL("ALTER TABLE " + Contracts.DateActivities.TABLE_NAME + " ADD COLUMN " + Contracts.DateActivities.C_GROUP + " int DEFAULT 0;");
sqLiteDatabase.execSQL("ALTER TABLE " + Contracts.DateActivities.TABLE_NAME + " ADD " + Contracts.DateActivities.C_GROUP + " INTEGER DEFAULT 0;");

Answer 1

我怀疑Contracts.DateActivities.C_GROUP是"组"（或"组"或"组"或......大小写无关紧要），这是SQLite的保留关键字...并且不能用于列名