Choosing the right types of data for your database tables is very important. It helps your database run better and keeps your information safe. When you pick data types, you need to think about what kind of data you want to save and how you will use it later.

First, let's look at the different types of data. For example, if you want to store names, like a student’s name, you should use a VARCHAR type. This type can handle names of different lengths easily.

If you need to save numbers, like a student ID, you can choose between INTEGER or BIGINT based on how large the number could be.

It's also important to use the right data types for how you plan to use them:

• Date/Time Data: If you need to store things like birth dates or when a student enrolls, use DATE or TIMESTAMP. This helps you sort and filter the data correctly.

• Boolean Values: If you want to know if a student is enrolled or not, use the BOOLEAN type. This makes it clear and easy to understand.

Next, think about how much space your data will take up. If you choose bigger data types than you really need, it will cost more to store them, and your queries (searching for information) will be slower. For example:

• Use TINYINT for small numbers.
• Use INT for regular numbers.
• Use BIGINT for very large numbers.

Also, pay attention to data rules. Using specific data types helps you keep your information accurate. For example, if you need to make sure a piece of information is required, you can set it to NOT NULL. This means that the record can't be created without that important info.

In summary, picking the right data types takes careful thought. By understanding what your data is and how you'll use it, you can choose types that help your database work better. This also keeps your university database systems safe and efficient.