# 系统函数
- **[系统函数兼容性概述](https://support.huaweicloud.com/distributed-ref-v10-gaussdb/gaussdb-08-0553.html)**   
- **[流程控制函数](https://support.huaweicloud.com/distributed-ref-v10-gaussdb/gaussdb-08-0554.html)**   
- **[日期和时间函数](https://support.huaweicloud.com/distributed-ref-v10-gaussdb/gaussdb-08-0555.html)**   
- **[字符串函数](https://support.huaweicloud.com/distributed-ref-v10-gaussdb/gaussdb-08-0556.html)**   
- **[强制转换函数](https://support.huaweicloud.com/distributed-ref-v10-gaussdb/gaussdb-08-0557.html)**   
- **[加密函数](https://support.huaweicloud.com/distributed-ref-v10-gaussdb/gaussdb-08-0558.html)**   
- **[比较函数](https://support.huaweicloud.com/distributed-ref-v10-gaussdb/gaussdb-08-0559.html)**   
- **[聚合函数](https://support.huaweicloud.com/distributed-ref-v10-gaussdb/gaussdb-08-0560.html)**   
- **[数字操作函数](https://support.huaweicloud.com/distributed-ref-v10-gaussdb/gaussdb-08-0561.html)**   
- **[其他函数](https://support.huaweicloud.com/distributed-ref-v10-gaussdb/gaussdb-08-0562.html)**