-- =============================================
-- Declare and using a KEYSET cursor
-- =============================================
DECLARE <cursor_name, sysname, test_cursor> CURSOR
KEYSET
FOR <select_statement, , SELECT au_fname FROM pubs.dbo.authors>
DECLARE @name varchar(40)
OPEN <cursor_name, sysname, test_cursor>
FETCH NEXT FROM <cursor_name, sysname, test_cursor> INTO @name
WHILE (@@fetch_status <> -1)
BEGIN
IF (@@fetch_status <> -2)
BEGIN
-- PRINT 'add user defined code here'
-- eg.
PRINT 'updating record for ' + @name
UPDATE pubs.dbo.authors
SET phone = replace(phone, ' ', '-')
WHERE CURRENT OF <cursor_name, sysname, test_cursor>
END
FETCH NEXT FROM <cursor_name, sysname, test_cursor> INTO @name
END
CLOSE <cursor_name, sysname, test_cursor>
DEALLOCATE <cursor_name, sysname, test_cursor>
GO
-- =============================================
-- Declare and using a READ_ONLY cursor
-- =============================================
DECLARE <cursor_name, sysname, test_cursor> CURSOR
READ_ONLY
FOR <select_statement, , SELECT au_fname FROM pubs.dbo.authors>
DECLARE @name varchar(40)
OPEN <cursor_name, sysname, test_cursor>
FETCH NEXT FROM <cursor_name, sysname, test_cursor> INTO @name
WHILE (@@fetch_status <> -1)
BEGIN
IF (@@fetch_status <> -2)
BEGIN
-- PRINT 'add user defined code here'
-- eg.
DECLARE @message varchar(100)
SELECT @message = 'my name is: ' + @name
PRINT @message
END
FETCH NEXT FROM <cursor_name, sysname, test_cursor> INTO @name
END
CLOSE <cursor_name, sysname, test_cursor>
DEALLOCATE <cursor_name, sysname, test_cursor>
GO
-- =============================================
-- Declare a SCROLL cursor and use various FETCH options
-- =============================================
DECLARE <cursor_name, sysname, test_cursor> SCROLL CURSOR FOR
<select_statement, , SELECT * FROM pubs.dbo.authors>
OPEN <cursor_name, sysname, test_cursor>
-- Fetch the first row in the cursor.
FETCH FIRST FROM <cursor_name, sysname, test_cursor>
-- Fetch the last row in the cursor.
FETCH LAST FROM <cursor_name, sysname, test_cursor>
-- Fetch the row immediately prior to the current row in the cursor.
FETCH PRIOR FROM <cursor_name, sysname, test_cursor>
-- Fetch the row immediately after the current row in the cursor.
FETCH NEXT FROM <cursor_name, sysname, test_cursor>
-- Fetch the nth row in the cursor.
FETCH ABSOLUTE <row_number, int, 8> FROM <cursor_name, sysname, test_cursor>
-- Fetch the row that is n rows before or after the current row.
FETCH RELATIVE <-/+ row_number, int, -2> FROM <cursor_name, sysname, test_cursor>
CLOSE <cursor_name, sysname, test_cursor>
DEALLOCATE <cursor_name, sysname, test_cursor>
GO
-- =============================================
-- Declare and using an UPDATE cursor
-- =============================================
DECLARE <@variable_1, sysname, @v1> <datatype_for_variable_1, sysname, varchar(20)>,
<@variable_2, sysname, @v2> <datatype_for_variable_2, sysname, varchar(40)>
DECLARE <cursor_name, sysname, test_cursor> CURSOR
FOR SELECT <column_1, sysname, au_fname>, <column_2, sysname, au_lname> FROM <table_name, sysname, pubs.dbo.authors>
FOR UPDATE of <column_1, sysname, au_fname>
DECLARE @count smallint
SELECT @count = 1
OPEN <cursor_name, sysname, test_cursor>
FETCH NEXT FROM <cursor_name, sysname, test_cursor> INTO <@variable_1, sysname, @v1>, <@variable_2, sysname, @v2>
WHILE (@@fetch_status <> -1)
BEGIN
IF (@@fetch_status <> -2)
BEGIN
-- PRINT 'add user-defined code here...'
-- eg
PRINT 'updating record of ' + @v1 + ' ' + @v2
UPDATE pubs.dbo.authors
SET au_fname = @v1 + '-' + CAST(@count AS varchar(4))
WHERE au_lname = @v2
END
FETCH NEXT FROM <cursor_name, sysname, test_cursor> INTO <@variable_1, sysname, @v1>, <@variable_2, sysname, @v2>
SELECT @count = @count + 1
END
CLOSE <cursor_name, sysname, test_cursor>
DEALLOCATE <cursor_name, sysname, test_cursor>
GO
