What is meant by default in SQL?

Why do we use default in SQL?

The DEFAULT Constraint is used to fill a column with a default and fixed value. The value will be added to all new records when no other value is provided. Dropping the default constraint will not affect the current data in the table, it will only apply to new rows.

What is a default in database?

Default values, in the context of databases, are preset values defined for a column type. Default values are used when many records hold similar data.

What is the meaning of default value?

default value means a value derived from a typical value by the application of pre-determined factors and that may, in circumstances specified in this Directive, be used in place of an actual value.

What is default NULL in SQL?

By default, a column can hold NULL values. The NOT NULL constraint enforces a column to NOT accept NULL values. This enforces a field to always contain a value, which means that you cannot insert a new record, or update a record without adding a value to this field.