SQL Expressions

SQL expressions are special expressions in the expression language, which are converted into SQL and evaluated in an external system that supports SQL (e.g., Snowflake, SQL Server, Databricks, Redshift). Only a subset of expression language functionalities are supported by SQL expressions (which are explained in this page).

• Arithmetics operators: Addition (+), Subtraction (-), Multiplication (*), Division (/), Remainder (%)
• Comparison operators: ==, <, <=, >, >=, !=.
• Logical operators: && (AND), || (OR), ! (NOT) are used to combine expressions that return boolean values.
• Data types: strings ("this is a string"), integers (123), decimal numbers (123.45), booleans (true, false)
• null value (null)

Function	Parameters	Description
CaseWhen		Goes through conditions and returns a value when the first condition is met, similar to an if-then-else. Once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the else-expression. Consists of any number of pairs of condition and value expressions followed by an optional else expression. CaseWhen(Column("a") == null, 1, Column("a") < 1.0, 2, 3) Returns 1 if the value of column "a" is null. Returns 2 if the value of column "a" is less than 1.0. Returns 3 otherwise.
Ceiling	number	Returns given value rounded to the nearest equal or larger integer. The data type should be one of the numeric data types. If the value is null, then the result is also null.
Coalesce		Returns the first non-null parameter it is given. There can be any number of parameters. If all parameters are null, returns null.
Column		Return the value of given column.
Concat		Return the concatenated string value of given values.
Floor		Returns given value rounded to the nearest equal or smaller integer. The data type should be one of the numeric data types. If the value is null, then the result is also null.
Variable		Returns the value of given variable. Supports number, string and boolean values. Examples: let x = "124256122"; CreateRedshiftConnection().Table("eventlog_o2c_events").Where(#sql{Column("CaseId")==Variable("x")}).Collect() Returns cases having id equal to "124256122".
DateDiff		Calculates the count of the specified datepart boundaries crossed between the specified dates. Parameters: datepart: Units in which datediff reports the difference between the dates. Supported date parts: second, minute, hour, day, week, quarter, month, year startDate: Starting timestamp. endDate: Ending timestamp.
Day		Returns the days part of given timestamp.
Hour		Returns the hours part of given timestamp.
Millisecond		Returns the milliseconds part of given timestamp.
Minute		Returns the minutes part of given timestamp.
Month		Returns the months part of given timestamp.
Second		Returns the seconds part of given timestamp.
Year		Returns the years part of given timestamp.