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).
In T-SQL, there are really two kinds of column-level defaults: default constraints and bound defaults. &#9;Default constraints are ANSI-standard constraints you can assign to a column either with the CREATE TABLE or ALTER TABLE statements.Although default constraints have names, the CREATE TABLE statement doesn't let you do ityou have to let SQL Server construct a name.hen add whether the column should be NULL or not: Finally, get the column default constraint value from the view: When you use the stored procedure against the preceding table, like so: the output of the stored procedure is. &#9;The stored procedure inserts tabs but can't make the columns line up precisely.