41.Say True or False. Give explanation if False. INSERT statement does not allow copying rows from one table to another. False. INSERT statement allows to add rows to a table …
31.What do you understand by a subquery? When is it used? A subquery is a SELECT statement embedded in a clause of another SELECT statement. It is used when the …
21.What is the difference between cross joins and natural joins? The cross join produces the cross product or Cartesian product of two tables. The natural join is based on all …
11.What is the default ordering of data using the ORDER BY clause? How could it be changed? The default sorting order is ascending. It can be changed using the DESC …
1.What is the difference between SQL and MySQL or SQL Server? SQL or Structured Query Language is a language; language that communicates with a relational database thus providing ways of …
