Breast cancer may cause swollen axillary lymph nodes since the lymph vessels of the breast drain into the lymph nodes of the armpit. These nodes become enlarged when cancer cells spread beyond the breast tissue.
Relational database. (Redirected from Database constraints) A relational database is a digital database whose organization is based on the relational model of data, as proposed by E. F. Codd in 1970. The various software systems used to maintain relational databases are known as a relational database management system (RDBMS).
Before You Begin. Limitations and restrictions. User-defined functions cannot be used to perform actions that modify the database state. User-defined functions cannot contain an OUTPUT INTO clause that has a table as its target. User-defined functions can not return multiple result sets. Use a stored procedure if you need to return multiple result sets.