Analytics SAQL Developer Guide

Overview
Quick Start
Examples
SAQL Reference
SAQL Basic Elements
Statements
Keywords
Identifiers
Number Literals
String Literals
Boolean Literals
Multivalue Field
Quoted String Escape Sequences
Special Characters
Comments
SAQL Operators
SAQL Statements
SAQL Functions
Query Performance
PDF

Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

Comments

To add a single-line comment in SAQL, preface your comment with two hyphens (--). To add a multi-line comment, start your comment with a forward slash and asterisk (/*) and end it with an asterisk and forward slash (*/).

Single-Line Comments

Here’s an example of a single-line comment on its own line. 
1--Load a data stream.
2a = load "myData";
You can put a comment at the end of a line of SAQL code.
1a = load "myData"; --Load a data stream.
To comment a line of SAQL code, add two hyphens at the beginning of the line.
1--The following line is commented out:
2--a = load "myData";

Multi-Line Comments

Here’s an example of a multi-line comment.

1q = load "campaign_data";
2q = group q by Owner;
3q = foreach q generate count() as 'count';
4/*
5q = limit q 5;
6*/