56 lines
1.5 KiB
Python
56 lines
1.5 KiB
Python
# -*- coding: utf-8 -*-
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"""
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根据 search_name 去重，只保留一条记录
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"""
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import sqlite3
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DB_PATH = r"D:\夏骥\微信研究\contacts.db"
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def main():
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conn = sqlite3.connect(DB_PATH)
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cursor = conn.cursor()
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# 1. 查找重复的 search_name
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cursor.execute('''
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SELECT search_name, COUNT(*) as cnt
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FROM contacts
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WHERE search_name != ''
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GROUP BY search_name
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HAVING COUNT(*) > 1
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ORDER BY cnt DESC
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''')
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duplicates = cursor.fetchall()
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print(f'发现 {len(duplicates)} 个重复的搜索姓名')
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# 2. 对每个重复的 search_name，只保留 id 最小的一条
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deleted_count = 0
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for search_name, cnt in duplicates:
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# 获取该 search_name 的所有 id
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cursor.execute('''
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SELECT id FROM contacts
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WHERE search_name = ?
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ORDER BY id
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''', (search_name,))
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ids = [row[0] for row in cursor.fetchall()]
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# 保留第一个，删除其他的
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keep_id = ids[0]
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delete_ids = ids[1:]
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if delete_ids:
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placeholders = ','.join('?' * len(delete_ids))
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cursor.execute(f'DELETE FROM contacts WHERE id IN ({placeholders})', delete_ids)
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deleted_count += len(delete_ids)
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print(f' "{search_name}": 保留 id={keep_id}, 删除 {len(delete_ids)} 条')
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conn.commit()
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conn.close()
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print(f'\n共删除 {deleted_count} 条重复记录')
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if __name__ == '__main__':
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main()
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