[英]How to delete multiple tables in one query?
我需要使用相同的ID刪除兩個表。 到目前為止,我正在使用此方法:
public Integer deleteSplitMondayByID (String ID){
SQLiteDatabase database = this.getWritableDatabase();
return database.delete(TABLE_NAME, "ID = ?", new String[]{ID});
}
我如何在那增加一張桌子? 我已經嘗試過類似的東西
(TABLE_NAME, TABLE_NAME2 "ID = ?", new String[]{ID})
(TABLE_NAME + " , " + TABLE_NAME2 "ID = ?", new String[]{ID})
(TABLE_NAME + " UNION " + TABLE_NAME2 "ID = ?", new String[]{ID})
但是我無法刪除它們。 那么,我該怎么做呢?
如前所述-您不能在單個語句中從兩個表中刪除,尤其是當它在Java庫中抽象時。 嘗試這樣的事情:
public Integer deleteSplitMondayByID (String ID){
int delcount = 0;
SQLiteDatabase database = this.getWritableDatabase();
database.beginTransaction();
try
{
delcount += database.delete(TABLE_NAME, "ID = ?", new String[]{ID});
delcount += database.delete(TABLE_NAME2, "ID = ?", new String[]{ID});
database.setTransactionSuccessful();
} finally {
database.endTransaction();
}
return delcount;
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.