> For the complete documentation index, see [llms.txt](https://docs.starcounter.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.starcounter.io/2.3.1/guides/sql/data-operators.md).

# Data operators

## Introduction

In Starcounter SQL, the most common operators on data are implemented.

## Arithmetic Operators

The standard arithmetic operators, plus (+ x), minus (- x), addition (x + y), subtraction (x - y), multiplication (x \* y) and division (x / y), are supported for all numerical types:

```sql
SELECT (e.Salary * 12) / 365 FROM Employee e
```

{% hint style="info" %}
For the expected datatypes of an arithmetic operation, see [Datatypes](/2.3.1/guides/database/datatypes.md).
{% endhint %}

## String Concatenation

String concatenation (x || y) is supported. See example below.

```sql
SELECT e.FirstName || ' ' || e.LastName FROM Employee e
```


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