Spaltenvorgaben

Spaltenvorgaben, also known as column specifications or column constraints, are rules and guidelines applied to columns in a database table. They define the characteristics and behavior of the data that can be stored in each column. Spaltenvorgaben ensure data integrity, consistency, and reliability within a database system. Common Spaltenvorgaben include data types, which specify the kind of data that can be stored (e.g., integer, text, date). Other constraints such as NOT NULL ensure that a column cannot have NULL values, while UNIQUE enforces that all values in the column must be distinct. Default values can be set to automatically populate a column with a specified value if no other value is provided. Primary keys and foreign keys are also types of Spaltenvorgaben that establish relationships between tables and enforce referential integrity. By defining Spaltenvorgaben, database administrators and developers can maintain the quality and accuracy of the data stored in a database.