Examlex
The presence of one or more foreign keys in a relation means that we cannot eliminate duplicated data in that table.
Q1: In UML,an attribute that is accessible only
Q4: A defining requirement for BCNF is that
Q7: Each physical record is addressed by its
Q9: MySQL supports BEFORE triggers.
Q14: SQL statements end with a colon.
Q16: In the MySQL Table Editor,the abbreviation AI
Q44: How is maximum cardinality expressed in IE
Q52: When a table is created using existing
Q64: The MySQL keyword to close and exit
Q68: A null value in a column may