看来检索行数很容易SELECT使用 SQL 查询编辑
cursor.execute("SELECT COUNT(*) from ...")
result=cursor.fetchone()
但我应该如何检索行数DELETE query?
“受影响的行”功能是通过以下方式实现的cursor.rowcount:
cursor.execute("DELETE from ...")
result = cursor.rowcount
Demo:
In [1]: import sqlite3
In [2]: db = sqlite3.connect(":memory:")
In [3]: cursor = db.cursor()
In [4]: cursor.execute("create table test(i)")
Out[4]: <sqlite3.Cursor at 0x103a3c260>
In [5]: cursor.execute("insert into test(i) values (1)")
Out[5]: <sqlite3.Cursor at 0x103a3c260>
In [6]: cursor.execute("insert into test(i) values (2)")
Out[6]: <sqlite3.Cursor at 0x103a3c260>
In [7]: cursor.execute("insert into test(i) values (3)")
Out[7]: <sqlite3.Cursor at 0x103a3c260>
In [8]: cursor.execute("delete from test where i >= 2")
Out[8]: <sqlite3.Cursor at 0x103a3c260>
In [9]: cursor.rowcount
Out[9]: 2
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