print('haha\\haha')
时间: 2023-08-20 18:11:53 浏览: 148
回答: 在MySQL中,如果你想打印一个常量,你可以使用SELECT语句来实现。在这个例子中,如果你想打印字符串'haha\haha',你可以使用以下语句:SELECT 'haha\\haha'。这将在结果中打印出'haha\haha'。\[1\]\[2\]\[3\]
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相关问题
用三种方法书写# haha = "撒抠脚34大汉风口65465sdfas4654654浪尖次撒的谎879风口浪1321尖撒的谎43风口浪尖阿萨德好asdfsd可怜" # 把haha字符串中数字放到列表1中,非数字放到列表2中,打印两个列表,显示数字是a列表, 非数字是B列表并且用一个print打印出来
好的,我可以帮你实现这个需求。
方法一:
```python
haha = "撒扣脚34大汉风口65465sdfas4654654浪尖次撒的谎879风口浪1321尖撒的谎43风口浪尖阿萨德好asdfsd可怜"
a = []
b = []
for i in haha:
if i.isdigit():
a.append(i)
else:
b.append(i)
print("数字列表:", a, "\n非数字列表:", b)
```
方法二:
```python
haha = "撒扣脚34大汉风口65465sdfas4654654浪尖次撒的谎879风口浪1321尖撒的谎43风口浪尖阿萨德好asdfsd可怜"
a = [i for i in haha if i.isdigit()]
b = [i for i in haha if not i.isdigit()]
print("数字列表:", a, "\n非数字列表:", b)
```
方法三:
```python
import re
haha = "撒扣脚34大汉风口65465sdfas4654654浪尖次撒的谎879风口浪1321尖撒的谎43风口浪尖阿萨德好asdfsd可怜"
a = re.findall('\d', haha)
b = re.findall('\D', haha)
print("数字列表:", a, "\n非数字列表:", b)
```
以上三种方法都可以实现将数字放入列表 a 中,将非数字放入列表 b 中,并打印两个列表。在这三种方法中,都使用了 Python 中的内置函数或模块来实现此功能。同时,我将两个列表的输出通过一个 print 语句输出,以便更方便地查看结果。
import cx_Oracle # 连接Oracle数据库 conn = cx_Oracle.connect('HHZNWSC/hhznwsc@192.168.139.9:1521/orcl') cursor = conn.cursor() # 查询重复实例号从test2表 query = "select instance from test2 group by instance having count(*) >1" cursor.execute(query) haha = cursor.fetchall() # 循环遍历查询结果,构造insert语句并输出到test1表 i = 0 for row in haha: instance = row[0] print(instance) insert_query = "delete from test2 where instance = '{0}' and ROWID NOT IN (SELECT MAX(ROWID) FROM test2 GROUP BY instance HAVING COUNT(*) > 1) ".format(instance) print(insert_query) print(row[0],'ok') cursor.execute(insert_query) conn.commit() i = i+1 print(i) # 关闭数据库连接 cursor.close() conn.close() 改为多进程
import cx_Oracle
import multiprocessing
def delete_duplicates(instance):
# 连接Oracle数据库
conn = cx_Oracle.connect('HHZNWSC/hhznwsc@192.168.139.9:1521/orcl')
cursor = conn.cursor()
# 构造delete语句
delete_query = "delete from test2 where instance = '{0}' and ROWID NOT IN (SELECT MAX(ROWID) FROM test2 GROUP BY instance HAVING COUNT(*) > 1)".format(instance)
# 执行delete语句
cursor.execute(delete_query)
conn.commit()
# 关闭数据库连接
cursor.close()
conn.close()
if __name__ == '__main__':
# 连接Oracle数据库
conn = cx_Oracle.connect('HHZNWSC/hhznwsc@192.168.139.9:1521/orcl')
cursor = conn.cursor()
# 查询重复实例号从test2表
query = "select instance from test2 group by instance having count(*) > 1"
cursor.execute(query)
instances = cursor.fetchall()
# 关闭数据库连接
cursor.close()
conn.close()
# 创建多个进程来并行处理删除操作
processes = []
for instance in instances:
p = multiprocessing.Process(target=delete_duplicates, args=(instance[0],))
processes.append(p)
p.start()
# 等待所有进程结束
for process in processes:
process.join()
print("删除操作已完成")