FETCH (Transact-SQL)
Applies to:
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Retrieves a specific row from a Transact-SQL server cursor.
Transact-SQL syntax conventions
Syntax
FETCH
[ [ NEXT | PRIOR | FIRST | LAST
| ABSOLUTE { n | @nvar }
| RELATIVE { n | @nvar }
]
FROM
]
{ { [ GLOBAL ] cursor_name } | @cursor_variable_name }
[ INTO @variable_name [ ,...n ] ]
Note
To view Transact-SQL syntax for SQL Server 2014 (12.x) and earlier versions, see Previous versions documentation.
Arguments
NEXT
Returns the result row immediately following the current row and increments the current row to the row returned. If FETCH NEXT
is the first fetch against a cursor, it returns the first row in the result set. NEXT
is the default cursor fetch option.
PRIOR
Returns the result row immediately preceding the current row, and decrements the current row to the row returned. If FETCH PRIOR
is the first fetch against a cursor, no row is returned and the cursor is left positioned before the first row.
FIRST
Returns the first row in the cursor and makes it the current row.
LAST
Returns the last row in the cursor and makes it the current row.
ABSOLUTE { n| @nvar}
If n or @nvar is positive, returns the row n rows from the front of the cursor and makes the returned row the new current row. If n or @nvar is negative, returns the row n rows before the end of the cursor and makes the returned row the new current row. If n or @nvar is 0, no rows are returned. n must be an integer constant and @nvar must be smallint, tinyint, or int.
RELATIVE { n| @nvar}
If n or @nvar is positive, returns the row n rows beyond the current row and makes the returned row the new current row. If n or @nvar is negative, returns the row n rows prior to the current row and makes the returned row the new current row. If n or @nvar is 0, returns the current row. If FETCH RELATIVE
is specified with n or @nvar set to negative numbers or 0 on the first fetch done against a cursor, no rows are returned. n must be an integer constant and @nvar must be smallint, tinyint, or int.
GLOBAL
Specifies that cursor_name refers to a global cursor.
cursor_name
Is the name of the open cursor from which the fetch should be made. If both a global and a local cursor exist with cursor_name as their name, cursor_name to the global cursor if GLOBAL is specified and to the local cursor if GLOBAL is not specified.
@cursor_variable_name
Is the name of a cursor variable referencing the open cursor from which the fetch should be made.
INTO @variable_name[ ,...n]
Allows data from the columns of a fetch to be placed into local variables. Each variable in the list, from left to right, is associated with the corresponding column in the cursor result set. The data type of each variable must either match or be a supported implicit conversion of the data type of the corresponding result set column. The number of variables must match the number of columns in the cursor select list.
Remarks
If the SCROLL
option is not specified in an ISO style DECLARE CURSOR
statement, NEXT
is the only FETCH
option supported. If SCROLL
is specified in an ISO style DECLARE CURSOR
, all FETCH
options are supported.
When the Transact-SQL DECLARE cursor extensions are used, these rules apply:
If either
FORWARD_ONLY
orFAST_FORWARD
is specified,NEXT
is the onlyFETCH
option supported.If
DYNAMIC
,FORWARD_ONLY
orFAST_FORWARD
are not specified, and one ofKEYSET
,STATIC
, orSCROLL
are specified, allFETCH
options are supported.DYNAMIC SCROLL
cursors support all theFETCH
options exceptABSOLUTE
.
The @@FETCH_STATUS
function reports the status of the last FETCH
statement. The same information is recorded in the fetch_status column in the cursor returned by sp_describe_cursor. This status information should be used to determine the validity of the data returned by a FETCH
statement prior to attempting any operation against that data. For more information, see @@FETCH_STATUS (Transact-SQL).
Permissions
Permissions for FETCH
default to any valid user.
Examples
A. Using FETCH in a simple cursor
The following example declares a simple cursor for the rows in the Person.Person
table with a last name that starts with B
, and uses FETCH NEXT
to step through the rows. The FETCH
statements return the value for the column specified in DECLARE CURSOR
as a single-row result set.
USE AdventureWorks2022;
GO
DECLARE contact_cursor CURSOR FOR
SELECT LastName FROM Person.Person
WHERE LastName LIKE 'B%'
ORDER BY LastName;
OPEN contact_cursor;
-- Perform the first fetch.
FETCH NEXT FROM contact_cursor;
-- Check @@FETCH_STATUS to see if there are any more rows to fetch.
WHILE @@FETCH_STATUS = 0
BEGIN
-- This is executed as long as the previous fetch succeeds.
FETCH NEXT FROM contact_cursor;
END
CLOSE contact_cursor;
DEALLOCATE contact_cursor;
GO
B. Using FETCH to store values in variables
The following example is similar to example A, except the output of the FETCH
statements is stored in local variables instead of being returned directly to the client. The PRINT
statement combines the variables into a single string and returns them to the client.
USE AdventureWorks2022;
GO
-- Declare the variables to store the values returned by FETCH.
DECLARE @LastName VARCHAR(50), @FirstName VARCHAR(50);
DECLARE contact_cursor CURSOR FOR
SELECT LastName, FirstName FROM Person.Person
WHERE LastName LIKE 'B%'
ORDER BY LastName, FirstName;
OPEN contact_cursor;
-- Perform the first fetch and store the values in variables.
-- Note: The variables are in the same order as the columns
-- in the SELECT statement.
FETCH NEXT FROM contact_cursor
INTO @LastName, @FirstName;
-- Check @@FETCH_STATUS to see if there are any more rows to fetch.
WHILE @@FETCH_STATUS = 0
BEGIN
-- Concatenate and display the current values in the variables.
PRINT 'Contact Name: ' + @FirstName + ' ' + @LastName
-- This is executed as long as the previous fetch succeeds.
FETCH NEXT FROM contact_cursor
INTO @LastName, @FirstName;
END
CLOSE contact_cursor;
DEALLOCATE contact_cursor;
GO
C. Declaring a SCROLL cursor and using the other FETCH options
The following example creates a SCROLL
cursor to allow full scrolling capabilities through the LAST
, PRIOR
, RELATIVE
, and ABSOLUTE
options.
USE AdventureWorks2022;
GO
-- Execute the SELECT statement alone to show the
-- full result set that is used by the cursor.
SELECT LastName, FirstName FROM Person.Person
ORDER BY LastName, FirstName;
-- Declare the cursor.
DECLARE contact_cursor SCROLL CURSOR FOR
SELECT LastName, FirstName FROM Person.Person
ORDER BY LastName, FirstName;
OPEN contact_cursor;
-- Fetch the last row in the cursor.
FETCH LAST FROM contact_cursor;
-- Fetch the row immediately prior to the current row in the cursor.
FETCH PRIOR FROM contact_cursor;
-- Fetch the second row in the cursor.
FETCH ABSOLUTE 2 FROM contact_cursor;
-- Fetch the row that is three rows after the current row.
FETCH RELATIVE 3 FROM contact_cursor;
-- Fetch the row that is two rows prior to the current row.
FETCH RELATIVE -2 FROM contact_cursor;
CLOSE contact_cursor;
DEALLOCATE contact_cursor;
GO
See Also
CLOSE (Transact-SQL)
DEALLOCATE (Transact-SQL)
DECLARE CURSOR (Transact-SQL)
OPEN (Transact-SQL)