如何合并sqlite3输出到一个文件

Question

我将每个表作为一个单独的文件获取TXT文件，如何将输出组合到一个TXT文件中？

with sqlite3.connect(r'db\test.sqlite') as conn:
    cursor = conn.cursor()
    tables = cursor.execute("SELECT name FROM sqlite_master WHERE type='table';").fetchall()
    for table in tables:
        rows = cursor.execute(f"SELECT * FROM {table[0]} WHERE USER_NAME COLLATE NOCASE LIKE ?",('%'+name+'%',)).fetchall()
        headers = [description[0] for description in cursor.description]

        if not rows:
            await update.message.reply_text("find no")

        else:
            row_text = f"test"

            for row in rows:
                row_text += "\n".join([f"\n\n[{table[0]}]"] + [f"[{headers[i]}]: {cell}" for i, cell in enumerate(row)])

        with open(f"{name}.txt", "w", encoding="utf-8") as f:
            f.write(row_text)

        with open(f"{name}.txt", "rb") as f:
            await update.message.reply_document(document=f)

conn.commit()
conn.close()

Answer 1

with open(f"{name}.txt", "w", encoding="utf-8") as f:
    f.write(row_text)

这确实以

w

（写）模式打开文件，从而覆盖现有内容（如果有）。如果您想添加新数据

后，应该使用

a

（附加）模式，即已经存在的代码，那就是do

with open(f"{name}.txt", "a", encoding="utf-8") as f:
    f.write(row_text)

cods

cods

有关详细信息。