我的应用程序中有一个无用的数据库。如何删除任何行?我的数据库代码如下:
mydb=Nickname.this.openOrCreateDatabase("private", 0, null);
mydb.execSQL("CREATE TABLE IF NOT EXISTS numbers(nickname varchar,number INT(13))");
有人知道怎么可能吗?
mydb=Clear.this.openOrCreateDatabase("private", 0, null);
mydb.execSQL("CREATE TABLE IF NOT EXISTS numbers(_id INTEGER PRIMARY KEY,nickname varchar,number INT(13))");
mydb.execSQL("DELETE FROM numbers WHERE id='=?' AND number='"+num+"'");
//num is string which contains which number i wish to delete
答案 0 :(得分:1)
SQLDatabase对象有一个删除方法。 public int delete(String table,String whereClause,String [] whereArgs)
mydb.delete(TABLE, "nickname = "+ DatabaseUtils.sqlEscapeString(name), null);
答案 1 :(得分:0)
mydb.execSQL("DELETE FROM your_db.your_table WHERE <write your SQL conditions here> ");