attributes of cursor in sql

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Rasel Ahmed answered on January 8, 2021 Popularity 10/10 Helpfulness 3/10

answer attributes of cursor in sql

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attributes of cursor in sql

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/*
Declare – Declares the cursor with a name and the select statement which populates the result set
Open – Opens a cursor and populates the cursor by executing the select statement which is specified while declaring a cursor
Fetch – To retrieve a specific row from the cursor based on the fetch arguments like NEXT, FIRST, LAST, etc
Close – Closes the current result set of SQL Server cursor and can be reopened
Deallocate – Removes cursor reference and releases all the resources associated with a cursor
*/

DECLARE @TempTable AS TABLE (Id INT, [Name] VARCHAR(200));

INSERT INTO @TempTable
VALUES (1,'Test Name1'),
(2,'Test Name2'),
(3,'Test Name2')

DECLARE 
    @Id INT, 
    @Name VARCHAR(200);

DECLARE cursor_personInfo CURSOR
FOR SELECT 
        Id, 
        [Name]
    FROM 
       @TempTable;

OPEN cursor_personInfo;

FETCH NEXT FROM cursor_personInfo INTO 
    @Id, 
    @Name;

WHILE @@FETCH_STATUS = 0
    BEGIN
        PRINT CONVERT(VARCHAR(10),@Id) +' '+ @Name;

        FETCH NEXT FROM cursor_personInfo INTO 
            @Id, 
            @Name;
    END;

CLOSE cursor_personInfo;

DEALLOCATE cursor_personInfo;

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Contributed on Jun 23 2022

Rasel Ahmed

0 Answers Avg Quality 2/10

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cursor in sql server

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DECLARE @TempTable AS TABLE (Id INT, [Name] VARCHAR(200));

INSERT INTO @TempTable
VALUES (1,'Test Name1'),
(2,'Test Name2'),
(3,'Test Name2')

DECLARE 
    @Id INT, 
    @Name VARCHAR(200);

DECLARE cursor_personInfo CURSOR
FOR SELECT 
        Id, 
        [Name]
    FROM 
       @TempTable;

OPEN cursor_personInfo;

FETCH NEXT FROM cursor_personInfo INTO 
    @Id, 
    @Name;

WHILE @@FETCH_STATUS = 0
    BEGIN
        PRINT CONVERT(VARCHAR(10),@Id) +' '+ @Name;

        FETCH NEXT FROM cursor_personInfo INTO 
            @Id, 
            @Name;
    END;

CLOSE cursor_personInfo;

DEALLOCATE cursor_personInfo;

/*
Declare – Declares the cursor with a name and the select statement which populates the result set
Open – Opens a cursor and populates the cursor by executing the select statement which is specified while declaring a cursor
Fetch – To retrieve a specific row from the cursor based on the fetch arguments like NEXT, FIRST, LAST, etc
Close – Closes the current result set of SQL Server cursor and can be reopened
Deallocate – Removes cursor reference and releases all the resources associated with a cursor
*/

Popularity 10/10 Helpfulness 7/10 Language sql

Source: Grepper

Tags: cursor cu

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Contributed on Jun 16 2022

Rasel Ahmed

0 Answers Avg Quality 2/10

what is cursor in sql server with example

Comment

/*
Declare – Declares the cursor with a name and the select statement which populates the result set
Open – Opens a cursor and populates the cursor by executing the select statement which is specified while declaring a cursor
Fetch – To retrieve a specific row from the cursor based on the fetch arguments like NEXT, FIRST, LAST, etc
Close – Closes the current result set of SQL Server cursor and can be reopened
Deallocate – Removes cursor reference and releases all the resources associated with a cursor
*/

ECLARE @TempTable AS TABLE (Id INT, [Name] VARCHAR(200));

INSERT INTO @TempTable
VALUES (1,'Test Name1'),
(2,'Test Name2'),
(3,'Test Name2')

DECLARE 
    @Id INT, 
    @Name VARCHAR(200);

DECLARE cursor_personInfo CURSOR
FOR SELECT 
        Id, 
        [Name]
    FROM 
       @TempTable;

OPEN cursor_personInfo;

FETCH NEXT FROM cursor_personInfo INTO 
    @Id, 
    @Name;

WHILE @@FETCH_STATUS = 0
    BEGIN
        PRINT CONVERT(VARCHAR(10),@Id) +' '+ @Name;

        FETCH NEXT FROM cursor_personInfo INTO 
            @Id, 
            @Name;
    END;

CLOSE cursor_personInfo;

DEALLOCATE cursor_personInfo;

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Source: www.sqlservertutorial.net

Tags: cursor cu

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Contributed on Jun 16 2022

Rasel Ahmed

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what is purpose of cursor in sql

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A SQL Server cursor is a set of T-SQL logic to loop over a predetermined number of rows one at a time. The purpose for the cursor may be to update one row at a time or perform an administrative process such as SQL Server database backups in a sequential manner.

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Contributed on Jan 08 2021

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SQL Cursor

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DECLARE @CONTACTID INT 

--will need to declare at least one variable

--in this case, to store values when iterating through cursor

DECLARE SIMPLE_CURSOR CURSOR FOR 
SELECT ID
FROM CONTACT

OPEN SIMPLE_CURSOR

FETCH NEXT FROM SIMPLE_CURSOR  --Start the cursor
INTO @CONTACTID

WHILE @@FETCH_STATUS = 0  --while there is a loaded record, keep processing
BEGIN

--do whatever you need to do
print ('This is where the magic happens! 
Do whatever you need to do (update/insert/delete/stored proc/etc.')

FETCH NEXT FROM SIMPLE_CURSOR INTO @CONTACTID  --fetch next record
END

CLOSE SIMPLE_CURSOR   --close and deallocate
DEALLOCATE SIMPLE_CURSOR

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Contributed on May 16 2022

Kevin Tsumura-Dare

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CURSOR in SQL

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IF OBJECT_ID('tempdb.dbo.#employees', 'U') IS NOT NULL drop table tempdb.dbo.#employees
 create table #employees (id int)
  insert into #employees
   select 1 union select 2 union select 3 union select 4 union select 5
--CURSOR
declare @id int
 declare @ids cursor
  set @ids = cursor
   for
    select id from #employees
	 open @ids
	  fetch next from @ids into @id
	   while @@FETCH_STATUS = 0 --can add more conditions
	    begin
		  select @id --process with cursor data
	       fetch next from @ids into @id
		end
 close @ids
deallocate @ids

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Source: Grepper

Tags: cursor sql

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Contributed on Jan 18 2024

Ram Subramoni

0 Answers Avg Quality 2/10

attributes of cursor in sql

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