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我的代码:的Android的SQLite中删除一行
public void droptablecontents(String category)
{
SQLiteDatabase db = this.getWritableDatabase();
String query = "DELETE FROM " + Table_Name + " WHERE " + KEY_CAT + "=" + category;
Cursor cursor = db.rawQuery(query, null);
cursor.moveToFirst();
cursor.close();
}
我的表的创建语句:
"CREATE TABLE IF NOT EXISTS " + Table_Name + "(" + KEY_NOTE + " TEXT, " + KEY_CAT + " TEXT" + ")"
我的日志猫错误:
android.database.sqlite.SQLiteException: no such column: Ideas (code 1): , while compiling: DELETE FROM Cats WHERE cat=Ideas
但为什么它寻找一个列命名为'想法'?我正在尝试在KEY_CAT列中搜索值'Ideas'。
'String [] params = new String [] {contact_no}; Cursor c = db.rawQuery(“DELETE FROM + Table_Name +”WHERE“+ KEY_CAT +”=?“, params);' –
**”从“+ Table_Name +”中删除其中“+ KEY_CAT +”(“ +类别+“)”** 试试这个查询 –