- StarRocks介绍
- 快速开始
- 表设计
- 导入数据
- 导出数据
- 使用StarRocks
- 参考手册
- SQL参考
- 用户账户管理
- 集群管理
- ADMIN CANCEL REPAIR
- ADMIN CHECK TABLET
- ADMIN REPAIR
- ADMIN SET CONFIG
- ADMIN SET REPLICA STATUS
- ADMIN SHOW CONFIG
- ADMIN SHOW REPLICA DISTRIBUTION
- ADMIN SHOW REPLICA STATUS
- ALTER SYSTEM
- CANCEL DECOMMISSION
- CREATE FILE
- DROP FILE
- INSTALL PLUGIN
- SHOW BACKENDS
- SHOW BROKER
- SHOW FRONTENDS
- SHOW FULL COLUMNS
- SHOW INDEX
- SHOW PLUGINS
- SHOW PROC
- SHOW PROCESSLIST
- SHOW TABLE STATUS
- SHOW FILE
- UNINSTALL PLUGIN
- DDL
- ALTER DATABASE
- ALTER TABLE
- ALTER VIEW
- BACKUP
- CANCEL BACKUP
- CANCEL RESTORE
- CREATE DATABASE
- CREATE INDEX
- CREATE MATERIALIZED VIEW
- CREATE REPOSITORY
- CREATE RESOURCE
- CREATE TABLE AS SELECT
- CREATE TABLE LIKE
- CREATE TABLE
- CREATE VIEW
- CREATE FUNCTION
- DROP DATABASE
- DROP INDEX
- DROP MATERIALIZED VIEW
- DROP REPOSITORY
- DROP RESOURCE
- DROP TABLE
- DROP VIEW
- DROP FUNCTION
- HLL
- RECOVER
- RESTORE
- SHOW RESOURCES
- SHOW FUNCTION
- TRUNCATE TABLE
- DML
- ALTER ROUTINE LOAD
- BROKER LOAD
- CANCEL LOAD
- CANCEL EXPORT
- DELETE
- EXPORT
- GROUP BY
- INSERT
- PAUSE ROUTINE LOAD
- RESUME ROUTINE LOAD
- CREATE ROUTINE LOAD
- SELECT
- SHOW ALTER
- SHOW BACKUP
- SHOW CREATE TABLE
- SHOW CRAETE VIEW
- SHOW DATA
- SHOW DATABASES
- SHOW DELETE
- SHOW DYNAMIC PARTITION TABLES
- SHOW EXPORT
- SHOW LOAD
- SHOW PARTITIONS
- SHOW PROPERTY
- SHOW REPOSITORIES
- SHOW RESTORE
- SHOW ROUTINE LOAD
- SHOW ROUTINE LOAD TASK
- SHOW SNAPSHOT
- SHOW TABLES
- SHOW TABLET
- SHOW TRANSACTION
- SPARK LOAD
- STOP ROUTINE LOAD
- STREAM LOAD
- 辅助命令
- 数据类型
- 函数参考
- 窗口函数
- JAVA UDF
- 日期函数
- convert_tz
- curdate
- current_timestamp
- curtime
- now
- date
- date_add
- date_sub
- date_format
- date_trunc
- dayname
- dayofmonth
- dayofweek
- dayofyear
- weekofyear
- monthname
- months_add
- months_diff
- now
- quarter
- month
- week
- day
- hour
- minute
- second
- years_diff
- months_diff
- weeks_diff
- datediff
- hours_diff
- minutes_diff
- seconds_diff
- timediff
- str_to_date
- str2date
- time_slice
- timestamp
- timestampadd
- timestampdiff
- from_unixtime
- unix_timestamp
- utc_timestamp
- from_days
- to_days
- to_date
- time_to_sec
- microseconds_add
- microseconds_sub
- year
- 加密函数
- 地理位置函数
- 字符串函数
- JSON 函数
- 模糊/正则匹配函数
- 工具函数
- 聚合函数
- Bitmap函数
- Array 函数
- Bit 函数
- cast函数
- hash函数
- 条件函数
- 百分位函数
- 数学函数
- 系统变量
- 错误码
- 系统限制
- SQL参考
- 常见问题解答
- 性能测试
编辑
MAX
功能
返回 expr 表达式的最大值
语法
MAX(expr)参数说明
epxr: 被选取的表达式
返回值说明
返回值为数值类型
示例
MySQL > select max(scan_rows)
from log_statis
group by datetime;
+------------------+
| max(`scan_rows`) |
+------------------+
| 4671587 |
+------------------+关键词
MAX