#1. Write a script to declare and use a cursor for the following SELECT statemen

Question

#1. Write a script to declare and use a cursor for the following SELECT statement. Use a WHILE loop to fetch each row in the result set. Omit the INTO clause to fetch directly to the Grids tab.

SELECT VendorName, AVG(InvoiceTotal) AS InvoiceAVG

FROM Vendors JOIN Invoices

ON Vendors.VendorID = Invoices.VendorID

GROUP BY VendorName

#2. Modify the solution to exercise 1 to fetch each row into a set of local variables. Use the PRINT statement to return each row in the format "Name, $0.00" to the Messages tab.

#3. Write a script that uses a cursor and dynamic SQL to output one row from each base user table in the AP database. Specifically exclude the tables named "dtproperties" and sysdiagrams" from the result set.

Explanation / Answer

#1

DECLARE @name VARCHAR(50) -- database name  
DECLARE @path VARCHAR(256) -- path for backup files  
DECLARE @fileName VARCHAR(256) -- filename for backup  
DECLARE @fileDate VARCHAR(20) -- used for file name

SET @path = 'C:Backup'  

SELECT @fileDate = CONVERT(VARCHAR(20),GETDATE(),112)

DECLARE db_cursor CURSOR FOR  
SELECT name
FROM MASTER.dbo.sysdatabases
WHERE name NOT IN ('master','model','msdb','tempdb')  

OPEN db_cursor  
FETCH NEXT FROM db_cursor INTO @name  

WHILE @@FETCH_STATUS = 0  
BEGIN  
       SET @fileName = @path + @name + '_' + @fileDate + '.BAK'  
       BACKUP DATABASE @name TO DISK = @fileName  

       FETCH NEXT FROM db_cursor INTO @name  
END  

CLOSE db_cursor  
DEALLOCATE db_cursor

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