SQLite的錯誤時，試圖從數據庫

Question

這是我的代碼數據庫

public ArrayList<SubCatInfo> getSubCatByCatIdAndtypeName(int id, 
      String typeName) { 

ArrayList<SubCatInfo> list = new ArrayList<SubCatInfo>(); 
     Cursor c = this.db.rawQuery("SELECT * FROM " + TB_SUBCAT 
       + " WHERE cat_id='" + id + " AND typeName='" + typeName,null); 

的logcat的表演得到個域中，

01-28 12:28:46.693: ERROR/AndroidRuntime(260): Caused by: android.database.sqlite.SQLiteException: near "1": syntax error: , while compiling: SELECT * FROM tbl_subcategories WHERE cat_id='11 AND typeName='1 

Answer 1

這是錯誤的，因爲也許你正在查詢的格式錯誤。下面的代碼而不是上面

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Cursor c = this.db.rawQuery("SELECT * FROM " + TB_SUBCAT + " WHERE cat_id=" + id + " AND typeName=" + typeName,null);