A column’s default value is set using the DEFAULT constraint. If no alternative value is supplied, the default value will be appended to all new records.
Defaults in the SQL Server
In SQL Server, the default constraint names start with specific pre Defaults in the SQL Server fixes: PK , UQ , CK , or FK . The default name for a PRIMARY KEY constraint starts with ‘ PK ‘, followed by underscores (‘ __ ‘), the table name, more underscores (‘ __ ‘), and a hexadecimal sequence number generated by SQL Server.
In SQL Server, defaults are values that are automatically assigned to a column when a new row is inserted into a table, if no explicit value is provided for that column. Defaults provide a way to specify a default value that is used when a value is not explicitly provided during an insert operation.
Defaults can be defined at the column level during table creation or added later using the ALTER TABLE statement. Here are a few key points regarding defaults in SQL Server:
- Default Constraints
- Syntax for Defining Defaults
- Default Values
- Nullable Columns
- Altering Defaults
- Dropping Defaults                                         Defaults provide a convenient way to handle scenarios where certain columns often have common or predefined values. They help ensure data consistency and can simplify data entry by automatically assigning default values when no explicit value is provided during an insert operation.
The DEFAULT constraint is used to set a default value for a column. The default value will be added to all new records, if no other value is specified.
What does SQL Server default do?
A column’s default value is set using the DEFAULT constraint. If no alternative value is supplied, the default value will be appended to all new records.
Defaults in the SQL Server
In SQL Server, the default constraint names start with specific pre Defaults in the SQL Server fixes: PK , UQ , CK , or FKÂ . The default name for a PRIMARY KEY constraint starts with ‘ PK ‘, followed by underscores (‘ __ ‘), the table name, more underscores (‘ __ ‘), and a hexadecimal sequence number generated by SQL Server.