数学函数
- round
- bround
- floor
- ceil
- rand
- exp
- log
- pow
- sqrt
- bin
- hex
- unhex
- abs
- pmod
- sin
- asin
- cos
- acos
- tan
- atan
- degrees
- radians
- signum
- factorial
- cbrt
- shiftleft
- shiftright
- shiftrightunsigned
- greatest
- least
集合函数
- size
- array_contains
- sort_array
类型转换函数
日期函数
- from_unixtime
- unix_timestamp
- to_date
- year
- quarter
- month
- dayofmonth
- dayofyear
- hour
- minute
- second
- weekofyear
- datediff
- date_add
- date_sub
- from_ut