What are the compatibility rules for SQL data types?

What are the compatibility rules for SQL data types?

SQL data types compatibility refers to how different data types can interact with each other in SQL operations. For example, when performing operations like joins or comparisons, certain data types can be implicitly converted to others.

Can you give me an example of incompatible data types?

Sure! An example of incompatible data types would be trying to compare a string type with a date type directly. SQL will throw an error in such cases.

How can I convert data types in SQL?

You can use functions like CAST() or CONVERT() to change one data type to another in SQL. For example, you can convert a string to an integer using CAST(your_column AS INT).

Are there any specific rules for numeric data types?

Yes, numeric data types can often be implicitly converted to other numeric types, but be cautious of precision loss when converting from a larger type to a smaller one.