# Standard built-in functions

The standard built-in functions supported in Derby are as follows:

- ABS or ABSVAL
- ACOS
- ASIN
- ATAN
- BIGINT
- CAST
- CEIL or CEILING
- CHAR
- Concatenation
- COS
- NULLIF and CASE expressions
- CURRENT_DATE
- CURRENT ISOLATION
- CURRENT_TIME
- CURRENT_TIMESTAMP
- CURRENT_USER
- DATE
- DAY
- DEGREES
- DOUBLE
- EXP
- FLOOR
- HOUR
- IDENTITY_VAL_LOCAL
- INTEGER
- LENGTH
- LN or LOG
- LOG10
- LOCATE
- LCASE or LOWER
- LTRIM
- MINUTE
- MOD
- MONTH
- PI
- RADIANS
- RTRIM
- SECOND
- SESSION_USER
- SIN
- SMALLINT
- SQRT
- SUBSTR
- TAN
- TIME
- TIMESTAMP
- UCASE or UPPER
- USER
- VARCHAR
- YEAR

Parent topic: Built-in functions