What are SQL operators and how do they work?

What are SQL operators and how do they work?

SQL operators are special symbols or keywords used to perform operations on data in SQL queries. They can be categorized into several types, such as arithmetic, comparison, logical, and bitwise operators.

Can you give me examples of each type of SQL operator?

Sure! For arithmetic operators, we have + (addition), - (subtraction), * (multiplication), and / (division). For comparison operators, examples include = (equal), != (not equal), < (less than), and > (greater than). Logical operators include AND, OR, and NOT.

How do I use these operators in a SQL query?

You can use operators in the WHERE clause of a SQL query to filter results. For example: SELECT * FROM users WHERE age > 18 AND status = 'active'; This query retrieves all active users older than 18.

Are there any common mistakes to avoid when using SQL operators?

Yes, common mistakes include using the wrong operator for comparisons, forgetting to use parentheses for logical conditions, and not considering data types when performing operations.