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我正在努力更新和查詢某些條目到我的數據庫。 上面的代碼將JobNo與數據庫中的條目進行比較,然後更新相應的代碼,但試圖僅更新該特定組件時,第二行會引發錯誤。什麼是寫入sqlite.query的正確方法? (Android)
long id = db.update(DatabaseHelper.COMP_TABLE, contentValues, DatabaseHelper.HCJOBNO + " = '" + HCJobNo + "'" , null);
long id = db.update(DatabaseHelper.COMP_TABLE, contentValues, DatabaseHelper.HCJOBNO + " = " + HCJobNo + " AND " + DatabaseHelper.COMPONENTTAG + " = " + ComponentTag , null);
Simliar查詢從數據庫 它拋出和錯誤獲取數據時。這第一行工作,其他兩個不正確
Cursor cursor = db.query(DatabaseHelper.COMP_TABLE, columns, DatabaseHelper.HCJOBNO + " = '" + JobNumber + "'", null, null, null, null);
Cursor cursor = db.query(DatabaseHelper.CONDITION_TABLE, columns, DatabaseHelper.CONDITIONJOBNO + " =? AND " + DatabaseHelper.PARTTAG + " =?", selectionArgs, null, null, null, null);
Cursor cursor = db.query(DatabaseHelper.COMP_TABLE, columns, DatabaseHelper.HCJOBNO + " = " + JobNumber + " AND " + DatabaseHelper.COMPONENTTAG + " = " + CompTag, null, null, null, null);
什麼是寫這個特定的代碼的正確方法?
Cursor cursor = db.query(DatabaseHelper.COMP_TABLE, columns, DatabaseHelper.HCJOBNO + " = " + JobNumber + " AND " + DatabaseHelper.COMPONENTTAG + " = " + CompTag, null, null, null, null);
編輯: 乾杯
long id = db.update(DatabaseHelper.COMP_TABLE, contentValues, DatabaseHelper.HCJOBNO + " = '" + HCJobNo + "' AND " + DatabaseHelper.COMPONENTTAG + " = '" + ComponentTag + "'", null);
它拋出了什麼錯誤?表格是如何定義的? –
android.database.sqlite.SQLiteException:沒有這樣的列:Rod(code 1): 下面的答案固定了吧 – Jube
接受答案然後,謝謝。 –