類型：
1.普通遊标 隻有NEXT操作
2.滾動遊标 有多種操作
1.普通遊标
DECLARE @username varchar(20),@UserId varchar(100)
DECLARE cursor_name CURSOR FOR --定義遊标
SELECT TOP 10 UserId,UserName FROM UserInfo
ORDER BY UserId DESC
OPEN cursor_name --打開遊标
FETCH NEXT FROM cursor_name INTO @UserId,@username --抓取下一行遊标資料
WHILE @@FETCH_STATUS = 0
BEGIN
PRINT \'使用者ID：\'+@UserId+\' \'+\'使用者名：\'+@username
FETCH NEXT FROM cursor_name INTO @UserId,@username
END
CLOSE cursor_name --關閉遊标
DEALLOCATE cursor_name --釋放遊标 結果：
使用者ID：zhizhi 使用者名：鄧鴻芝
使用者ID：yuyu 使用者名：魏雨
使用者ID：yujie 使用者名：李玉傑
使用者ID：yuanyuan 使用者名：王夢緣
使用者ID：YOUYOU 使用者名：lisi
使用者ID：yiyiren 使用者名：任毅
使用者ID：yanbo 使用者名：王豔波
使用者ID：xuxu 使用者名：陳佳緒
使用者ID：xiangxiang 使用者名：李慶祥
使用者ID：wenwen 使用者名：魏文文 2.滾動遊标
--帶SCROLL選項的遊标
SET NOCOUNT ON
DECLARE C SCROLL CURSOR FOR --SCORLL 後，有了更多的遊标操作（滾動遊标）
SELECT TOP 10 UserId,UserName FROM UserInfo
ORDER BY UserId DESC
OPEN C
FETCH LAST FROM C --最後一行的資料，并将目前行為指定行
FETCH ABSOLUTE 4 FROM C --從第一行開始的第4行資料，并将目前行為指定行 這裡的n可正可負，n>0 往下翻，n<0 往上翻
FETCH RELATIVE 3 FROM C --相對于目前行的後3行資料，并将目前行為指定行 這裡的n可正可負
FETCH RELATIVE -2 FROM C --相對于目前行的前2行資料，并将目前行為指定行
FETCH PRIOR FROM C ----相對于目前行的前1行資料
FETCH FIRST FROM C --剛開始第一行的資料，并将目前行為指定行
FETCH NEXT FROM C --相對于目前行的後1行資料
CLOSE C
DEALLOCATE C 結果（可以參考第一個結果分析）：
具體FETCH用法：
FETCH
[ [ NEXT | PRIOR | FIRST | LAST
| ABSOLUTE { n | @nvar }
| RELATIVE { n | @nvar }
]
FROM
]
{ { [ GLOBAL ] cursor_name } | @cursor_variable_name }
[ INTO @variable_name [ ,...n ] ] 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.