Microsoft SQL Server Compact 3.5 supports functions.
Supported Functions
SQL Server Compact 3.5 supports the following functions.
Aggregate Functions
Perform calculations on a set of values and return a single value. Except for the COUNT function, aggregate functions ignore null values.
AVGAVG
COUNT
MAX
MIN
SUM
Date and Time Functions
Perform an operation on a date and time input value and return a string, numeric, or date and time value.
DATEADD
DATEDIFF
DATENAME
DATEPART
GETDATE
Mathematical Functions
Perform calculations based on input values provided as parameters to the function and return a numeric value.
ABS
ACOS
ASIN
ATAN
ATN2
CEILING
COS
COT
DEGREES
EXP
FLOOR
LOG
LOG10
PI
POWER
RADIANS
RAND
ROUND
SIGN
SIN
SQRT
TAN
String Functions
Perform an operation on a string input value and return a string or numeric value.
NCHAR
CHARINDEX
LEN
LOWER
LTRIM_lce_ltrim
PATINDEX
REPLACE
REPLICATE
RTRIM
SPACE_lce_space
STR
STUFF
SUBSTRING
UNICODE
UPPER_lce_upper
System Functions
Perform operations on, and return information about, values, objects, and settings in SQL Server Compact 3.5.
@@IDENTITY
COALESCE
DATALENGTH