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Sep 25, 2018 · Cursor might used for retrieving data row by row basis.its act like a looping statement (ie while or for loop). To use cursors in SQL procedures, you need to do the following: 1.Declare a cursor that defines a result set. 2.Open the cursor to establish the result set. 3.Fetch the data into local variables as needed from the cursor, one row at a ...
After recently switching from Oracle to SQL Server (employer preference), I notice cursor support in SQL Server is lagging. Cursors are not always evil, sometimes required, sometimes much faster, and sometimes cleaner than trying to tune a complex query by re-arranging or adding optimization hints.
The SQL:2003 standard defines positioned update and positioned delete SQL statements for that purpose. Such statements do not use a regular WHERE clause with predicates. Instead, a cursor identifies the row. The cursor must be opened and already positioned on a row by means of FETCH statement.
It is total chaos. I tried to use an inner cursor with the variables coming from the outer cursor. But It seems that its stuck in the inner cursor. A part of the query looks like this: Fetch NEXT FROM OUTER_CURSOR INTO @CONTACT_ID, @TYPE. While (@@FETCH_STATUS <> -1) BEGIN. IF (@@FETCH_STATUS <> -2) DECLARE INNER_CURSOR Cursor.
This should work: DECLARE db_cursor CURSOR FOR SELECT name, age, color FROM table; DECLARE @myName VARCHAR(256); DECLARE @myAge INT; DECLARE @myFavoriteColor VARCHAR(40); OPEN db_cursor; FETCH NEXT FROM db_cursor INTO @myName, @myAge, @myFavoriteColor; WHILE @@FETCH_STATUS = 0 BEGIN --Do stuff with scalar values FETCH NEXT FROM db_cursor INTO @myName, @myAge, @myFavoriteColor; END; CLOSE db_cursor; DEALLOCATE db_cursor;
May 9, 2013 · If you really have to use a cursor for some reason that is not part of the question. You could do. DECLARE @Id int; DECLARE @Ids TABLE (Id Int); DECLARE Warning_Cursor CURSOR FOR SELECT TOP 3 ID FROM Warnings; OPEN Warning_cursor; FETCH NEXT FROM Warning_cursor INTO @Id; WHILE @@FETCH_STATUS = 0 BEGIN INSERT @Ids SELECT @Id; FETCH NEXT FROM Warning_cursor INTO @Id; END CLOSE Warning_cursor; DEALLOCATE Warning_cursor; SELECT Id FROM @Ids;
Nov 3, 2016 · declare curPO cursor for select Product_ID, CurrentPOs from #t1 for update of CurrentPOs open curPO fetch next from curPO while @@fetch_status = 0 begin select OrderQuantity = <calculation>, ReceiveQuantity = <calculation> into #POs from PurchaseOrderLine POL inner join SupplierAddress SA ON POL.Supplier_ID = SA.Supplier_ID inner join PurchaseOrderHeader POH ON POH.PurchaseOrder_ID = POL.PurchaseOrder_ID where Product_ID = curPO.Product_ID and SA.AddressType = '1801' update curPO set ...
Apr 4, 2017 · This simple example can help you. -- assume this is your table. create table #tmp (MyDbName varchar(100), MyDbId int, MyStatus int) -- you need to have a variable for each field. DECLARE @MyDbName varchar(100) DECLARE @MyDbId int. DECLARE @MyDbStatus int. DECLARE db_cursor CURSOR FOR.
By using T-SQL and cursors like this : DECLARE @MyCursor CURSOR; DECLARE @MyField YourFieldDataType; BEGIN. SET @MyCursor = CURSOR FOR. select top 1000 YourField from dbo.table. where StatusID = 7. OPEN @MyCursor. FETCH NEXT FROM @MyCursor.
Mar 15, 2013 · I'm trying to create table using statements stored in table. I'm using a cursor with execute(sql) as below: create table tab ( CreateSql varchar(250) ) insert into tab values ('create table tab...
