How to use default value for character varying in PostgreSQL? Read the article to learn more. As part of our PostgreSQL Support, Bobcares provides answers to all of your questions.

Steps to Use Default Value for Character Varying in PostgreSQL

When we define a column in a PostgreSQL table as character variable (or varchar), we can also specify a default value for it. The character varying type is used to store strings with changeable lengths. When we give a default value for a varchar column, PostgreSQL will use the default value instead of an explicit value if a new row is inserted into the table.

Also, the default value should be a valid varchar statement. This can include a literal string enclosed in single quotes (e.g., ‘This is the default value’). A null value expressly converted to varchar.

Benefits

1. Enforces Consistency: When users do not explicitly indicate a value, default values serve as a fallback, ensuring data consistency.

2. Reduces Code: We don’t have to create code in order to insert the default value whenever a new row is added.

3. Data Integrity: If the column accepts null values (but no null constraint is enforced), a default value prevents rows from being inserted that contain missing data.

An Example

In this example, the email column’s default value is ‘unknown@example.com’. If we create a new user without supplying an email address, then, the default value will be used.

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Conclusion

To sum up, the article offers the details on using the default value for character varying in PostgreSQL.