Download Querying Data with Transact-SQL.70-761.BrainDumps.2018-05-18.75q.vcex

Box 1: SELECT..COALESCE…The COALESCE function evaluates the arguments in order and returns the current value of the first expression that initially does not evaluate to NULL. Box 2: ..LEFT OUTER JOIN..The LEFT JOIN (LEFT OUTER JOIN) keyword returns all rows from the left table (table1), with the matching rows in the right table (table2). The result is NULL in the right side when there is no match. A customer might have no orders so the right table must be allowed have a NULL value. Box 3: ON c.custid = o.custidWe JOIN on the custID column, which is available in both tables. Box 4: GROUP BY c.custidReferences:https://technet.microsoft.com/en-us/library/ms189499(v=sql.110).aspxhttp://www.w3schools.com/sql/sql_join_left.asp

Box 1: custidIDENTITY indicates that the new column is an identity column. When a new row is added to the table, the Database Engine provides a unique, incremental value for the column. Identity columns are typically used with PRIMARY KEY constraints to serve as the unique row identifier for the table. Box2: postalcodepostalcode is declared as NOT NULL, which means that a value must be inserted. Box 3: regionFax is also a correct answer. Both these two columns are declared as NULL, which means that data entry is optional. References: https://msdn.microsoft.com/en-us/library/ms174979.aspx

DELETE FROM Sales.Orders WHERE OrderDate < '2012-01-01' AND ShippedDate NOT NULL References:https://msdn.microsoft.com/en-us/library/ms189835.aspxhttps://msdn.microsoft.com/en-us/library/bb630352.aspx

SELECT TOP(3) FirstName + ' ' + LastName AS Fullname, S.SalesYTD FROM Person as P INNER JOIN SalesPerson AS S ON P.PersonID = S.SalesPersonID WHERE S.TerritoryID IS NOT NULL ORDER BY S.SalesYTD ; On ordering: ASC | DESCSpecifies that the values in the specified column should be sorted in ascending or descending order. ASC sorts from the lowest value to highest value. DESC sorts from highest value to lowest value. ASC is the default sort order. Null values are treated as the lowest possible values. References: https://msdn.microsoft.com/en-us/library/ms189463.aspx

SELECT Complaints.ComlaintID, Persons.Name FROM Persons JOIN Contacts ON Persons.PersonID=Contacts.PersonID JOIN Complaints ON Contacts.ComplaintID=Complaints.ComplaintID References: https://technet.microsoft.com/en-us/library/ms190014(v=sql.105).aspx

ISNULL Syntax: ISNULL ( check_expression , replacement_value ) author:"Luxemburg, Rosa"The ISNULL function replaces NULL with the specified replacement value. The value of check_expression is returned if it is not NULL; otherwise, replacement_value is returned after it is implicitly converted to the type of check_expression. References: https://msdn.microsoft.com/en-us/library/ms184325.aspx

The OUTPUT Clause returns information from, or expressions based on, each row affected by an INSERT, UPDATE, DELETE, or MERGE statement. These results can be returned to the processing application for use in such things as confirmation messages, archiving, and other such application requirements. The results can also be inserted into a table or table variable. Additionally, you can capture the results of an OUTPUT clause in a nested INSERT, UPDATE, DELETE, or MERGE statement, and insert those results into a target table or view. Note: If the column modified by the .RITE clause is referenced in an OUTPUT clause, the complete value of the column, either the before image in deleted.column_name or the after image in inserted.column_name, is returned to the specified column in the tablevariable.Incorrect Answers:C: The deleted.Creditlimit should be inserted in the second column, the OldCreditLimit column, not the third column.References: https://msdn.microsoft.com/en-us/library/ms177564.aspx

Box 1: RANK() OVERRANK returns the rank of each row within the partition of a result set. The rank of a row is one plus thenumber of ranks that come before the row in question. ROW_NUMBER and RANK are similar. ROW_NUMBER numbers all rows sequentially (for example 1, 2, 3, 4, 5). Incorrect Answers:DENSE_RANK returns the rank of rows within the partition of a result set, without any gaps in the ranking. The rank of a row is one plus the number of distinct ranks that come before the row in question. Box 2: (PARTITION BY CityID ORDER BY MIN(AccountOpenedDate) DESC)Syntax for RANK: RANK ( ) OVER ( [ partition_by_clause ] order_by_clause )  Box 3: GROUP BY CityIDReferences: https://msdn.microsoft.com/en-us/library/ms176102.aspx

Using Cross Joins A cross join that does not have a WHERE clause produces the Cartesian product of the tables involved in the join. The size of a Cartesian product result set is the number of rows in the first table multiplied by the number of rows in the second table. However, if a WHERE clause is added, the cross join behaves as an inner join. B: You can use the IIF in the ON-statement.IIF returns one of two values, depending on whether the Boolean expression evaluates to true or false in SQL Server. References:https://technet.microsoft.com/en-us/library/ms190690(v=sql.105).aspxhttps://msdn.microsoft.com/en-us/library/hh213574.aspx

The datetime datetype defines a date that is combined with a time of day with fractional seconds that is based on a 24-hour clock. The DATEFROMPARTS function returns a date value for the specified year, month, and day. Incorrect Answers:A: ValidFrom should be less (<) than @sdate AND ValidTo should be greater (>) than @edate.B: We should add a day with DATEADD, not subtract one day.C: We cannot compare a date to an exact datetime.References: https://msdn.microsoft.com/en-us/library/ms187819.aspx