What Data Type Is Yes No in SQL?

What Data Type Is Yes No in SQL?

In SQL, the data type for representing a Yes/No value is typically called a bit data type. The bit data type is used to store boolean values, where 1 represents true (Yes) and 0 represents false (No).

It is commonly used to represent binary or Boolean values in a database table.

Bit Data Type

The bit data type in SQL can be considered as the smallest unit of storage in terms of memory consumption. It typically requires only 1 byte of storage space, and its value can either be 0 or 1.

This small size makes it highly efficient for storing boolean values with minimal storage requirements.

To define a column with the bit data type in SQL, you can use the following syntax:

column_name BIT

For example, if you have a table called “Employees” and want to add a column to represent whether an employee is active or not, you can use the bit data type:

CREATE TABLE Employees (
    EmployeeID int,
    Name varchar(50),
    IsActive bit
);

Using Bit Data Type in SQL Queries

When working with the bit data type in SQL queries, you can use it within conditional statements such as WHERE clauses or in conjunction with logical operators.

Here’s an example of a SELECT statement using the bit data type:

SELECT EmployeeID, Name
FROM Employees
WHERE IsActive = 1;

In this example, we are selecting the EmployeeID and Name columns from the Employees table where the IsActive column is set to 1 (true/Yes). This query will return all active employees.

Conclusion

In SQL, the bit data type is commonly used to represent Yes/No or boolean values. It is a compact and efficient way to store binary information, requiring only 1 byte of storage space.

By understanding how to define columns with the bit data type and how to use it in SQL queries, you can effectively handle boolean values in your database tables.