SQLServer數據庫循環表操作每一條數據（游標的使用）

DECLARE @FunctionCode VARCHAR(20)--聲明游標變量
DECLARE curfuntioncode CURSOR FOR SELECT FunctionalityCode FROM dbo.SG_Functionality WHERE Type=2 ORDER BY TimeStamp --創建游標
OPEN curfuntioncode --打開游標
FETCH NEXT FROM curfuntioncode INTO @FunctionCode --給游標變量賦值
WHILE @@FETCH_STATUS=0 --判斷FETCH語句是否執行執行成功
BEGIN 
PRINT @FunctionCode  --打印數據（對每一行數據進行操作）
FETCH NEXT FROM curfuntioncode INTO @FunctionCode --下一個游標變量賦值
END 
CLOSE curfuntioncode --關閉游標
DEALLOCATE curfuntioncode --釋放游標

 

 

示例

CREATE PROC USP_AddPermissions_Admin ( @usercode NVARCHAR(50) ) AS

DECLARE @UserID UNIQUEIDENTIFIER

BEGIN

SET @UserID=(SELECT UserID FROM dbo.SG_User WHERE UserCode=@usercode)

DECLARE @FunctionCode VARCHAR(20)

DECLARE curfuntioncode CURSOR FOR SELECT FunctionalityCode FROM dbo.SG_Functionality WHERE Type=2 ORDER BY TimeStamp

OPEN curfuntioncode FETCH NEXT FROM curfuntioncode INTO @FunctionCode

WHILE @@FETCH_STATUS=0

BEGIN

INSERT INTO SG_UserFunctionality (UserFunctionalityID,UserID,FunctionalityCode,Type)VALUES(NEWID(),@UserID,@FunctionCode ,2)

FETCH NEXT FROM curfuntioncode INTO @FunctionCode

END

CLOSE curfuntioncode

DEALLOCATE curfuntioncode

END

 操作多個字段版本

DECLARE coupon CURSOR FOR select CouponID,BatchMakeCouponID from CRM_Coupon WHERE CouponType='9' and State=4 and IssueDate<=GETDATE() --創建游標
OPEN coupon --打開游標

DECLARE @CouponID UNIQUEIDENTIFIER,@BatchMakeCouponID UNIQUEIDENTIFIER--聲明游標變量
FETCH NEXT FROM coupon INTO @CouponID,@BatchMakeCouponID --給游標變量賦值

--開始循環
WHILE @@FETCH_STATUS=0
BEGIN

if (select StartDate from CRM_BatchMakeCoupon WHERE BatchMakeCouponID =@BatchMakeCouponID) is null--開始時間為空
begin 
update CRM_Coupon set State = 0, IssueBy = null, IssueDate = null, MemberID = null, MemberNO = null , StartDate = null, EndDate = null, UpdateBy = null, UpdateDate=null where CouponID=@CouponID
end
else
begin 
update CRM_Coupon set State = 0, IssueBy = null, IssueDate = null, MemberID = null, MemberNO = null , UpdateBy = null, UpdateDate=null where CouponID=@CouponID
end
 
  FETCH NEXT FROM coupon INTO @CouponID, @BatchMakeCouponID
END

CLOSE coupon --關閉游標
DEALLOCATE coupon --釋放游標