sql,SELECT column_name, COUNT(*),FROM table_name,GROUP BY column_name,HAVING COUNT(*) > 1;,
`,,这段代码会返回所有在
column_name`列中出现超过一次的值及其出现的次数。python3 your_script.py
或创建 systemd 服务文件进行管理。redis-cli
来执行各种操作。以下是一些常用的 Redis 命令:,,1. **启动 Redis 服务器**:, ``sh, redis-server,
`,,2. **连接到 Redis 服务器**:,
`sh, redis-cli,
`,,3. **设置键值对**:,
`sh, SET mykey "Hello, World!",
`,,4. **获取键的值**:,
`sh, GET mykey,
`,,5. **删除键**:,
`sh, DEL mykey,
`,,6. **检查键是否存在**:,
`sh, EXISTS mykey,
`,,7. **设置键的过期时间**:,
`sh, EXPIRE mykey 60,
`,,8. **查看所有键**:,
`sh, KEYS *,
`,,9. **发布消息到频道**:,
`sh, PUBLISH mychannel "Hello, subscribers!",
`,,10. **订阅频道**:,
`sh, SUBSCRIBE mychannel,
``Powered By Z-BlogPHP 1.7.3