Pregunta de entrevista de TCS

Difference between primary key and unique key. Questions based on unique key and composite key. Write function to return multiple values. Sql queries to print values, update statement to update multiple rows in single command. Questions around package - Overloading, security wise etc. Question on procedures - Role of proc in package, input parameters etc. Collections questions - methods, scenerio based if delete is used, how to use trim with it. Assign value of one collection to anoth