Question 23 A table T1 in a relational database has the following rows and columns: roll no. marks 1 10 2 20 3 30 4 Null […]

Question 3 Consider two tables in a relational database with columns and rows as follows: Table: Student ROLL_NO NAME DEPT_ID 1 ABC 1 2 DEF 1 […]

Question 5 Consider a relational database containing the following schemas. The primary key of each table is indicated by underlying the constituent fields. SELECT s.sno, s.sname […]

Question 1 Which one of the following is used to represent the supporting many-one relationships of a weak entity set in an entity-relationship diagram? A Ovals […]