In SQL (Structured Query Language), there are various operators that you can use to perform operations on data within a database. These operators are used in SQL queries to manipulate, compare, and combine data. Here are some commonly used SQL operators:

1. Arithmetic Operators:

- Addition (+): Adds two values.
- Subtraction (-): Subtracts one value from another.
- Multiplication (*): Multiplies two values.
- Division (/): Divides one value by another.
- Modulus (%): Returns the remainder of a division operation.

2. Comparison Operators:

- Equal to (=): Checks if two values are equal.
- Not equal to (!= or <>): Checks if two values are not equal.
- Greater than (>): Checks if one value is greater than another.
- Less than (<): Checks if one value is less than another.
- Greater than or equal to (>=): Checks if one value is greater than or equal to another.
- Less than or equal to (<=): Checks if one value is less than or equal to another.

3. Logical Operators:

- AND: Returns true if all conditions separated by AND are true.
- OR: Returns true if any of the conditions separated by OR is true.
- NOT: Negates a condition.

4. String Operators:

- Concatenation (+ or ||): Concatenates two strings together.
- LIKE: Searches for a specified pattern in a string.
- IN: Checks if a value matches any value in a list.

5. NULL-related Operators:

- IS NULL: Checks if a value is NULL.
- IS NOT NULL: Checks if a value is not NULL.

6. Aggregate Functions:

- `COUNT()` (counts the number of rows or non-null values)
- `SUM()` (calculates the sum of values)
- `AVG()` (calculates the average of values)
- `MAX()` (finds the maximum value)
- `MIN()` (finds the minimum value)

These are just a few examples of SQL operators. The specific set of operators available may vary slightly depending on the database management system (DBMS) you are using, as different DBMSs may have their own proprietary operators or extensions to the standard SQL operators./p>