Các loại con trỏ máy chủ SQL - Chỉ chuyển tiếp con trỏ động | Hướng dẫn sử dụng SQL Server / TSQL

--drop table dbo.Customer
Create table dbo.Customer ( 
CustomerId Int Identity(1,1),
CustomerName VARCHAR(100),
StreetAddress VARCHAr(100),
City VARCHAR(100),
State CHAR(2))
go

--Insert couple of Records in Sample Table
Insert into dbo.Customer
Select 'Aamir shahzad','Test Street Address','Charlotte','NC'
Union 
Select 'M Raza','Test Street Address','Charlotte','NC'

Select * from dbo.Customer

--Insert NEW Record
Insert into dbo.Customer
Select 'John Smith','Test Street Address','New York City','NY'

--Delete Records
Delete from dbo.Customer
Where CustomerName in ('Aamir Shahzad','M Raza')

--Update All Record
Update dbo.Customer
set CustomerName='NO NAME'




--Cursor Script

Declare @CustomerID INT
Declare @CustomerNAme VARCHAR (100)
DECLARE @StreetAddress VARCHAR(100)
DECLARE @City VARCHAR(100)
DECLARE @State CHAR(2)

--DECLARE A CURSOR
DECLARE CUR CURSOR
Forward_Only Dynamic
FOR
Select CustomerID,CustomerName,StreetAddress,City,State from dbo.Customer

--OPEN CURSOR
OPEN CUR
Print 'CURSOR IS OPEN'
--FETCH NEXT RECORD
FETCH NEXT FROM CUR INTO @CustomerID,@CustomerNAme,@StreetAddress,@City,@State
WHILE @@FETCH_STATUS=0
BEGIN 
RAISERROR ('',0,1) WITH NOWAIT
WAITFOR DELAY '00:00:15'
PRINT CONCAT(@CustomerID,' ',@CustomerNAme,' ',@StreetAddress,' ',@City,' ',@State)
FETCH NEXT FROM CUR INTO @CustomerID,@CustomerNAme,@StreetAddress,@City,@State

END
CLOSE CUR
DEALLOCATE CUR