Sqlserver中一直在用又經常被忽略的知識點一

本文轉載自查看原文 2016-10-24 08:30 3423 SqlServer

已經有快2個月沒有更新博客了，實在是因為最近發生了太多的事情，辭了工作，在湘雅醫院待了一個多月，然后又新換了工作......

在平時的工作中，Sqlserver中許多知識點是經常用到的，但是有時候我們往往忽略了它們，在過去的一年里，一直使用的是Mysql，現在又開始接觸Sqlserver了，所以就把一些常用又容易忽視的Sqlserver知識點總結一點，以便備忘之用。

所有的操作都將基於Northwind數據庫來進行操作。

注意：當采用附加Northwind數據庫的方式進行數據庫遷移的時候，可能會出現錯誤：“Access is denied”。解決方案： right-click the SQL Server Management Studio icon and select Run as administrator。

數據在線Mock地址：https://www.mockaroo.com/

SET NOCOUNT ON 介紹

在存儲過程中，經常用到SET NOCOUNT ON；

作用：阻止在結果集中返回顯示受T-SQL語句或則usp影響的行計數信息。
當SET NOCOUNT ON 時候，不返回計數，當SET NOCOUNT OFF時候，返回計數。

當SET NOCOUNT ON 時候，會更新@@RowCount，但是不向客戶端發送存儲過程每個語句的DONE_IN_proc消息。

如果存儲過程中包含一些並不返回實際數據的語句，使用SET NOCOUNT ON時，網絡通信流量便會大量減少，可以顯著提高應用程序性能。

SET NOCOUNT 指定的設置只在執行或運行時候生效，分析時候不生效。

示例：

USE Northwind
GO
SET NOCOUNT OFF;
SELECT TOP 5 OrderDate FROM Orders
GO

執行結果如下：

USE Northwind
GO
SET NOCOUNT ON;
SELECT TOP 5 OrderDate FROM Orders
GO

執行結果如下：

Go 介紹

如果只是執行一條語句，有沒有GO都一樣。

如果多條語句之間用GO分隔開就不一樣了。

每個被GO分隔的語句都是一個單獨的事務，一個語句執行失敗不會影響其它語句執行。

GO 不是 Transact-SQL 語句；而是可為 SQL Server 查詢分析器識別的命令。

如果你的SQL過長的時候，就要寫GO，或者有一些語句，它只能是第一句操作的，在之前你也得寫 GO ，GO的意思是分批處理語句，有加這個 GO ，就執行GO 行的代碼，執行后再執行接下來的代碼。

像以下這種情況下就要用到GO ，以達到分批處理數據的目的，否則將會報錯。

IF EXISTS(SELECT 1 FROM sys.views WHERE name='View_OrderInfo')
DROP VIEW View_OrderInfo
create view View_OrderInfo
as
select c.ContactName,c.CompanyName,o.OrderDate,o.ShipName,o.OrderID,o.Freight from [Orders] o inner join Customers c on o.CustomerID=c.CustomerID

會報錯

必須是：

IF EXISTS(SELECT 1 FROM sys.views WHERE name='View_OrderInfo')
DROP VIEW View_OrderInfo
GO
create view View_OrderInfo
as
select c.ContactName,c.CompanyName,o.OrderDate,o.ShipName,o.OrderID,o.Freight from [Orders] o inner join Customers c on o.CustomerID=c.CustomerID

select count(*) count(1) count(2) count('a') 之間的區別

count(*)：找表中最短的列進行統計行數

count(1) count(2) count('a')：對常數列進行統計行數。它們的執行方式是一樣的，沒有任何區別。

很顯然采用count(1) count(2) count('a')的方式，效率會更高，因為count(*)會先去算出最短的列，然后再去統計。雖然現在的Sqlserver查詢分析器自動會幫我們做一些優化，但是我們必須知道它們的實現原理。

WITH (NOLOCK)

缺點:

　　1.會產生臟讀

　　2.只適用於select查詢語句

優點:

　　1.有些文章說，加了WITH (NOLOCK)的SQL查詢效率可以增加33%。

　　2.可以用於inner join 或者left join等語句

臟讀: 一個用戶對一個資源做了修改，此時另外一個用戶正好讀取了這條被修改的記錄，然后，第一個用戶放棄修改，數據回到修改之前，這兩個不同的結果就是臟讀。

詳細內容:

　　要提升SQL的查詢效能，一般來說大家首先會考慮建立索引(index)。其實除了index的建立之外，當我們在下SQL Command時，在語法中加一段WITH (NOLOCK)可以改善在線大量查詢的環境中數據集被LOCK的現象藉此改善查詢的效能。

不過有一點千萬要注意的就是，WITH (NOLOCK)的SQL SELECT有可能會造成Dirty Read(臟讀)。

例如：

SELECT o.OrderID,o.OrderDate,o.Freight,d.Quantity,d.UnitPrice
FROM [dbo].[Orders] o WITH (NOLOCK)
JOIN [dbo].[Order Details] d WITH (NOLOCK)
ON o.OrderID=d.OrderID

DELETE、INSERT、UPDATE這些需要transaction的指令就不能使用WITH (NOLOCK)。

加了WITH (NOLOCK)即告訴SQL Server，我們的這段SELECT指令無需去考慮目前table的transaction lock狀態，因此效能上會有明顯的提升，而且數據庫系統的Lock現象會有明顯的減少(包含Dead Lock)。

當使用NoLock時，它允許閱讀那些已經修改但是還沒有交易完成的數據。因此如果有需要考慮transaction事務數據的實時完整性時，使用WITH (NOLOCK)就要好好考慮一下。
如果不需考慮transaction，WITH (NOLOCK)或許是個好用的參考。

Sqlserver高效分頁

在SQLserver2012之前，分頁我們一般是使用ROW_NUMBER()。以獲取第11條到第50條數據為例：

ROW_NUMBER()的實現方式：

select * from (
　　　　select *, ROW_NUMBER() OVER(Order by a.OrderID DESC ) AS RowNumber from Orders as a
　　) as b
　　where RowNumber BETWEEN 11 and 50

SQLserver2012中OFFSET & FETCH實現方式：

SELECT o.* FROM dbo.Orders o
ORDER BY o.OrderID DESC OFFSET 10 ROWS FETCH NEXT 40 ROWS ONLY

OFFSET & FETCH實現方式更加精簡更加高效。

使用 OFFSET-FETCH 中的限制

ORDER BY 是使用 OFFSET 和 FETCH 子句所必需的。

OFFSET 子句必須與 FETCH 一起使用。永遠不能使用 ORDER BY … FETCH。

TOP 不能在同一個查詢表達式中與 OFFSET 和 FETCH 一起使用。

OFFSET/FETCH 行計數表達式可以是將返回整數值的任何算術、常量或參數表達式。該行計數表達式不支持標量子查詢

ALTER PROCEDURE getLightningSendOverTimeOrder --閃電送到期存儲過程
(@OverTimeMinutes INT,--超時時間閾值
@GetLasterDay int --取最近多少天的訂單
)
As
DECLARE @sql NVARCHAR(MAX);
BEGIN
set nocount on;
set @Sql=
N'WITH    OrderInfo
          --查詢近一天的，處理超時的閃電送訂單
          AS ( SELECT   ID ,
                        CommunityId ,
                        SubOrderNumber
               FROM     dbo.[Order] WITH ( NOLOCK )
               WHERE    DATEDIFF(day, CreatedOn, GETDATE()) <= @GetLasterDay
                        AND DATEDIFF(mi, CreatedOn, ModifiedOn) > @OverTimeMinutes
                        AND LightningSend = 1
                        AND IsDeleted = 0
 --待付款(商品訂單),待確認(商品訂單),待發貨(商品訂單),待收貨(商品訂單)
                        AND OrderStatusId IN (
                        ''C2EE784F-F29B-4E18-8D73-761264339005'',
                        ''FA1A31DF-3855-41BB-9F5C-A09F3AB4C408'',
                        ''ACF190B2-0CA2-43A0-8E6B-70DF8521F4C5'',
                        ''15F06407-C82C-4CA8-984E-37FB3BD9963C'' )
             ),
       SmsOrder
          --沒有發送過信息的訂單
          AS ( SELECT   o.ID ,
                        o.CommunityId ,
                        o.SubOrderNumber
               FROM     OrderInfo o WITH ( NOLOCK )
                        where not EXISTS(SELECT 1 FROM  [dbo].[Sms_LightningSendOrderOverTime] lso
                        WITH ( NOLOCK ) WHERE o.SubOrderNumber = lso.SubOrderNumber)                      
             ),
        SmsOrderInfo
          AS ( SELECT   
                        so.CommunityId ,
                        so.SubOrderNumber ,
                        p.PublisherId ,
                        c.ConvenienceStoreID ,
                        oi.ProductId ,
                        p.CategoryId ,
                        p.ProcessType
               FROM     SmsOrder AS so WITH ( NOLOCK )
                        INNER JOIN Community c WITH ( NOLOCK ) ON so.CommunityId = c.ID
                        INNER JOIN dbo.OrderItem oi WITH ( NOLOCK ) ON so.ID = oi.OrderId
                        INNER JOIN dbo.Product p WITH ( NOLOCK ) ON oi.ProductId = p.Id
                                                              AND p.LightningSend = 1
                                                               AND p.ProcessType != 1 -- 便利店
             ),
            MerchantSmsOrderInfo
          AS ( SELECT   
                        so.CommunityId ,
                        so.SubOrderNumber ,
                        p.PublisherId ,
                        c.ConvenienceStoreID ,
                        oi.ProductId ,
                        p.CategoryId ,
                        p.ProcessType
               FROM     SmsOrder AS so WITH ( NOLOCK )
                        INNER JOIN Community c WITH ( NOLOCK ) ON so.CommunityId = c.ID
                        INNER JOIN dbo.OrderItem oi WITH ( NOLOCK ) ON so.ID = oi.OrderId
                        INNER JOIN dbo.Product p WITH ( NOLOCK ) ON oi.ProductId = p.Id
                                                              AND p.LightningSend = 1
                                                              AND p.ProcessType = 1 -- 商家
             ),
        ResultInfo
        AS ( 
    SELECT   usr.Id AS UserId ,
                        soi.SubOrderNumber ,
                        usr.PhoneNumber
               FROM     SmsOrderInfo AS soi
                        INNER JOIN dbo.[User] AS usr WITH ( NOLOCK ) ON soi.ConvenienceStoreID = usr.OrgId
                        INNER JOIN dbo.Organization org WITH ( NOLOCK ) ON usr.OrgId = org.Id
                                                              AND org.Levels = 2 --便利店
                        INNER JOIN OrderDistributaryCategoryRelation AS odcr
                        WITH ( NOLOCK ) ON usr.Id = odcr.MerchantUserId
                                           AND odcr.CategoryType = 1
                                           AND odcr.SellerId = soi.ConvenienceStoreID
                                           AND odcr.CategoryId = soi.CategoryId
                        INNER JOIN OrderDistributary AS odb WITH ( NOLOCK ) ON usr.Id = odb.MerchantUserId
                                                              AND odb.SellerId = soi.ConvenienceStoreID
                        INNER JOIN OrderDistributaryRelation AS odbr WITH ( NOLOCK ) ON usr.Id = odbr.MerchantUserId
                                                              AND odbr.MerchantId = soi.ConvenienceStoreID
               UNION ALL
               SELECT   u.Id AS UserId ,
                        soi.SubOrderNumber ,
                        u.PhoneNumber
               FROM     dbo.[User] u WITH ( NOLOCK )
                        INNER JOIN OrderDistributary odb WITH ( NOLOCK ) ON u.Id = odb.MerchantUserId
                                                            AND odb.IsDefault = 1
                        INNER JOIN SmsOrderInfo soi WITH ( NOLOCK ) ON odb.SellerId = soi.ConvenienceStoreID
             ------------------------------商家-----------------------------
               UNION ALL
               SELECT   usr.Id AS UserId ,
                        soi.SubOrderNumber ,
                        usr.PhoneNumber
               FROM     MerchantSmsOrderInfo AS soi
                        INNER JOIN dbo.[User] AS usr WITH ( NOLOCK ) ON soi.ConvenienceStoreID = usr.OrgId
                        INNER JOIN dbo.Organization org WITH ( NOLOCK ) ON usr.OrgId = org.Id
                                                              AND org.Levels = 1 --商家
                        INNER JOIN OrderDistributaryCategoryRelation AS odcr
                        WITH ( NOLOCK ) ON usr.Id = odcr.MerchantUserId
                                           AND odcr.CategoryType = 1
                                           AND odcr.CategoryId = soi.CategoryId
                        INNER JOIN OrderDistributary AS odb WITH ( NOLOCK ) ON usr.Id = odb.MerchantUserId
                                                              AND odb.SellerId = soi.PublisherId
                        INNER JOIN OrderDistributaryRelation AS odbr WITH ( NOLOCK ) ON odcr.MerchantUserId = odbr.MerchantUserId
                                                              AND odbr.MerchantId = soi.ConvenienceStoreID
               UNION ALL
               SELECT   u.Id AS UserId ,
                        soi.SubOrderNumber ,
                        u.PhoneNumber
               FROM     MerchantSmsOrderInfo soi WITH ( NOLOCK )
                        INNER JOIN OrderDistributary odb WITH ( NOLOCK ) ON odb.SellerId = soi.PublisherId
                                                            AND odb.IsDefault = 1
                                                            AND odb.IsDeleted = 0
                        INNER JOIN dbo.[User] u WITH ( NOLOCK ) ON u.Id = odb.MerchantUserId
             )
            SELECT  r.SubOrderNumber ,
            r.UserId,
            r.PhoneNumber
    FROM    ResultInfo r '
exec sp_executesql @Sql,N'@OverTimeMinutes int,@GetLasterDay int',@OverTimeMinutes,@GetLasterDay;
SET NOCOUNT OFF;
END

View Code

自己寫的一個存儲過程例子

--------------------------------------創建閃電送存儲過程-----------------------------------
IF EXISTS(Select Name From Sysobjects Where Name='getLightningSendOverTimeOrder' And Xtype='P')
DROP PROCEDURE [dbo].getLightningSendOverTimeOrder
GO
CREATE PROCEDURE getLightningSendOverTimeOrder --閃電送到期存儲過程
(@OverTimeMinutes INT,--超時時間閾值
@GetLasterDay int --取最近多少天的訂單
)
As
DECLARE @sql NVARCHAR(MAX);
BEGIN
set nocount on;
set @Sql=
N'WITH    OrderInfo
          --查詢近一天的，處理超時的閃電送訂單
          AS ( SELECT   ID ,
                        CommunityId ,
                        SubOrderNumber
               FROM     dbo.[Order] WITH ( NOLOCK )
               WHERE    DATEDIFF(day, CreatedOn, GETDATE()) <= @GetLasterDay
                        AND DATEDIFF(mi, CreatedOn, ModifiedOn) > @OverTimeMinutes
                        AND LightningSend = 1
                        AND IsDeleted = 0
 --待付款(商品訂單),待確認(商品訂單),待發貨(商品訂單),待收貨(商品訂單)
                        AND OrderStatusId IN (
                        ''C2EE784F-F29B-4E18-8D73-761264339005'',
                        ''FA1A31DF-3855-41BB-9F5C-A09F3AB4C408'',
                        ''ACF190B2-0CA2-43A0-8E6B-70DF8521F4C5'',
                        ''15F06407-C82C-4CA8-984E-37FB3BD9963C'' )
            UNION ALL
--狀態一直是待支付狀態的
SELECT ID ,
                        CommunityId ,
                        SubOrderNumber
               FROM     dbo.[Order] WITH ( NOLOCK )
               WHERE    DATEDIFF(day, CreatedOn, GETDATE()) <=@GetLasterDay
                        AND LightningSend = 1
                        AND IsDeleted = 0
                        AND (OrderStatusId =''ACF190B2-0CA2-43A0-8E6B-70DF8521F4C5'' AND DATEDIFF(mi, CreatedOn, GETDATE()) >@OverTimeMinutes)
             ),
       SmsOrder
          --需要發送過信息的訂單
          AS ( SELECT   o.ID ,
                        o.CommunityId ,
                        o.SubOrderNumber
               FROM     OrderInfo o WITH ( NOLOCK )
                        where not EXISTS(SELECT 1 FROM  [dbo].[Sms_LightningSendOrderOverTime] lso
                        WITH ( NOLOCK ) WHERE o.SubOrderNumber = lso.SubOrderNumber)                      
             ),
        SmsOrderInfo
          AS ( SELECT   
                        so.CommunityId ,
                        so.SubOrderNumber ,
                        p.PublisherId ,
                        c.ConvenienceStoreID ,
                        oi.ProductId ,
                        p.CategoryId ,
                        p.ProcessType
               FROM     SmsOrder AS so WITH ( NOLOCK )
                        INNER JOIN Community c WITH ( NOLOCK ) ON so.CommunityId = c.ID
                        INNER JOIN dbo.OrderItem oi WITH ( NOLOCK ) ON so.ID = oi.OrderId
                        INNER JOIN dbo.Product p WITH ( NOLOCK ) ON oi.ProductId = p.Id
                                                              AND p.LightningSend = 1
                                                               AND p.ProcessType != 1 -- 便利店
             ),
            MerchantSmsOrderInfo
          AS ( SELECT   
                        so.CommunityId ,
                        so.SubOrderNumber ,
                        p.PublisherId ,
                        c.ConvenienceStoreID ,
                        oi.ProductId ,
                        p.CategoryId ,
                        p.ProcessType
               FROM     SmsOrder AS so WITH ( NOLOCK )
                        INNER JOIN Community c WITH ( NOLOCK ) ON so.CommunityId = c.ID
                        INNER JOIN dbo.OrderItem oi WITH ( NOLOCK ) ON so.ID = oi.OrderId
                        INNER JOIN dbo.Product p WITH ( NOLOCK ) ON oi.ProductId = p.Id
                                                              AND p.LightningSend = 1
                                                              AND p.ProcessType = 1 -- 商家
             ),
        ResultInfo
        AS ( 
    SELECT   usr.Id AS UserId ,
                        soi.SubOrderNumber ,
                        usr.PhoneNumber
               FROM     SmsOrderInfo AS soi
                        INNER JOIN dbo.[User] AS usr WITH ( NOLOCK ) ON soi.ConvenienceStoreID = usr.OrgId
                        INNER JOIN dbo.Organization org WITH ( NOLOCK ) ON usr.OrgId = org.Id
                                                              AND org.Levels = 2 --便利店
                        INNER JOIN OrderDistributaryCategoryRelation AS odcr
                        WITH ( NOLOCK ) ON usr.Id = odcr.MerchantUserId
                                           AND odcr.CategoryType = 1
                                           AND odcr.SellerId = soi.ConvenienceStoreID
                                           AND odcr.CategoryId = soi.CategoryId
                        INNER JOIN OrderDistributary AS odb WITH ( NOLOCK ) ON usr.Id = odb.MerchantUserId
                                                              AND odb.SellerId = soi.ConvenienceStoreID
                        INNER JOIN OrderDistributaryRelation AS odbr WITH ( NOLOCK ) ON usr.Id = odbr.MerchantUserId
                                                              AND odbr.MerchantId = soi.ConvenienceStoreID
               UNION ALL
               SELECT   u.Id AS UserId ,
                        soi.SubOrderNumber ,
                        u.PhoneNumber
               FROM     dbo.[User] u WITH ( NOLOCK )
                        INNER JOIN OrderDistributary odb WITH ( NOLOCK ) ON u.Id = odb.MerchantUserId
                                                            AND odb.IsDefault = 1
                        INNER JOIN SmsOrderInfo soi WITH ( NOLOCK ) ON odb.SellerId = soi.ConvenienceStoreID
             ------------------------------商家-----------------------------
               UNION ALL
               SELECT   usr.Id AS UserId ,
                        soi.SubOrderNumber ,
                        usr.PhoneNumber
               FROM     MerchantSmsOrderInfo AS soi
                        INNER JOIN dbo.[User] AS usr WITH ( NOLOCK ) ON soi.ConvenienceStoreID = usr.OrgId
                        INNER JOIN dbo.Organization org WITH ( NOLOCK ) ON usr.OrgId = org.Id
                                                              AND org.Levels = 1 --商家
                        INNER JOIN OrderDistributaryCategoryRelation AS odcr
                        WITH ( NOLOCK ) ON usr.Id = odcr.MerchantUserId
                                           AND odcr.CategoryType = 1
                                           AND odcr.CategoryId = soi.CategoryId
                        INNER JOIN OrderDistributary AS odb WITH ( NOLOCK ) ON usr.Id = odb.MerchantUserId
                                                              AND odb.SellerId = soi.PublisherId
                        INNER JOIN OrderDistributaryRelation AS odbr WITH ( NOLOCK ) ON odcr.MerchantUserId = odbr.MerchantUserId
                                                              AND odbr.MerchantId = soi.ConvenienceStoreID
               UNION ALL
               SELECT   u.Id AS UserId ,
                        soi.SubOrderNumber ,
                        u.PhoneNumber
               FROM     MerchantSmsOrderInfo soi WITH ( NOLOCK )
                        INNER JOIN OrderDistributary odb WITH ( NOLOCK ) ON odb.SellerId = soi.PublisherId
                                                            AND odb.IsDefault = 1
                                                            AND odb.IsDeleted = 0
                        INNER JOIN dbo.[User] u WITH ( NOLOCK ) ON u.Id = odb.MerchantUserId
             )
            SELECT  r.SubOrderNumber ,
            r.UserId,
            r.PhoneNumber
    FROM    ResultInfo r '
exec sp_executesql @Sql,N'@OverTimeMinutes int,@GetLasterDay int',@OverTimeMinutes,@GetLasterDay;
SET NOCOUNT OFF;
END


GO

View Code

demo2:分頁存儲過程

------------------------------------------創建我的優惠券存儲過程 created by zouqj-2017-3-1-----------------------------------
IF EXISTS(Select Name From Sysobjects Where Name='usp_GetMyCouponsList' And Xtype='P')
DROP PROCEDURE usp_GetMyCouponsList
GO
CREATE PROC usp_GetMyCouponsList
(
@PageIndex int, --頁碼
@PageSize int, --
@hostName nvarchar(100),--服務器地址
@MemberID UNIQUEIDENTIFIER, --會員ID
@IsGetTotalInfo BIT,  --是否得到統計信息，1為得到統計信息，0為不得到統計信息，返回記錄集
@HasStatus BIT, -- 是否有狀態
@CouponsStatus INT --優惠券狀態
)
AS
----------------------------------------定義參數--------------------------------------
declare @strSql NVARCHAR(max);
DECLARE @IsUseCount INT
DECLARE @ExpiredCount INT
DECLARE @NoUseCount INT
DECLARE @where NVARCHAR(100);
set nocount on;
----------------------------------------SQL開始--------------------------------------
IF @HasStatus=1
BEGIN
SET @where='m.[State]=@CouponsStatus';
END
ELSE
BEGIN
SET @where='1=1'
END
IF @IsGetTotalInfo=0
BEGIN
SET @strSql=N'SELECT DISTINCT t.* FROM (SELECT m.[State] AS [STATUS],
m.CouponCode AS CouponsCode,
m.CampaignID AS CampaignID,
c.Code as CampaignCode,
c.Name AS CampaignName,
b.ValidityStartTime AS CampaignStartTime,
b.ValidityEndTime AS CampaignEndTime,
c.Price as CouponsAmount,
(CASE WHEN c.IsLimited =1 THEN 1 ELSE 2 END  ) as IsLimited,
c.FullAmount as MinAmount,
e.[Type] AS CouponsType,
(CASE WHEN b.IconUrl IS NULL THEN N'''' WHEN b.IconUrl=N'''' THEN N'''' ELSE @hostName+b.IconUrl END) AS IconUrl

FROM  Loy_MemberCoupon m WITH ( NOLOCK ) INNER JOIN 
 [dbo].[MK_Campaign] AS a WITH ( NOLOCK ) ON m.CampaignID=a.ID AND m.MemberID=@MemberID AND '+@where+'
        LEFT OUTER JOIN [dbo].[MK_CouponConfig] AS b  WITH ( NOLOCK ) ON a.[ID] = b.[CampaignID] 
        LEFT OUTER JOIN [dbo].[MK_Coupon] AS c WITH ( NOLOCK ) ON b.[CouponID] = c.[ID]
        LEFT OUTER JOIN [dbo].[MK_CouponRestriction] AS d  WITH ( NOLOCK ) ON c.[ID] = d.[CompainID]
        LEFT OUTER JOIN [dbo].[MK_CouponRestrictCategory] AS e WITH ( NOLOCK ) ON d.[ID] = e.[CouponRestrictionID]
        ) t
        ORDER BY t.CampaignEndTime
offset (@PageIndex-1)*@PageSize  ROWS  FETCH NEXT @PageIndex*@PageSize ROWS ONLY'
exec sp_executesql @strSql,N'@PageIndex int,@PageSize int,@hostName nvarchar(100),@MemberID UNIQUEIDENTIFIER,@where NVARCHAR(100),@CouponsStatus int',@PageIndex=@PageIndex,@PageSize=@PageSize,@hostName=@hostName,@MemberID=@MemberID,@where=@where,@CouponsStatus=@CouponsStatus
END
ELSE
BEGIN
-------------------------------------------------------------
SELECT @IsUseCount=COUNT(1) FROM (SELECT DISTINCT m.CouponCode
FROM  Loy_MemberCoupon m WITH ( NOLOCK ) WHERE m.MemberID=@MemberID AND m.[State]=2
        ) t
SELECT @ExpiredCount=COUNT(1) FROM (SELECT DISTINCT m.CouponCode
FROM  Loy_MemberCoupon m WITH ( NOLOCK ) WHERE m.MemberID=@MemberID AND m.[State]=3
        ) t
SELECT @NoUseCount=COUNT(1) FROM (SELECT DISTINCT m.CouponCode
FROM  Loy_MemberCoupon m WITH ( NOLOCK ) WHERE m.MemberID=@MemberID AND m.[State]=1
        ) t
SELECT @IsUseCount AS IsUseCount,@ExpiredCount AS ExpiredCount,@NoUseCount AS NoUseCount
END
----------------------------------------SQL結束--------------------------------------
set nocount off;

View Code

免責聲明！

本站轉載的文章為個人學習借鑒使用，本站對版權不負任何法律責任。如果侵犯了您的隱私權益，請聯系本站郵箱yoyou2525@163.com刪除。

猜您在找 一直在用restTemplate?你是否真搞清楚了？推薦幾款我一直在用的chrome插件（下）推薦幾款我一直在用的chrome插件（上）你一直在用的 Spring Boot Starters 究竟是怎么回事 Redis的最常被問到知識點總結 C#:SqlServer操作的知識點 Openstack 一直在調度中解決面試題Redis最常被問到知識點總結 idea一直在build問題寫給一直在背鍋的你