Salesforce.com Lightning and Lightning Web Component – Learn & Share
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 copying rows from an existing table.
Read More31.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 inner query, o4r the subquery returns a value that is…
Read More21.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 the columns having same name and data types in both…
Read More11.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 keyword, after the column name in the ORDER BY clause.
Read More1.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 manipulating and creating databases. MySQL and Microsoft’s SQL Server both…
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