SQL腳本花費太多時間並拋出超時錯誤

Question

我正在執行我的應用程序中的SQL腳本。使用這個腳本，我從Product表中取數據並將其放入Table1。如果我直接從SSMS執行這個腳本，它將花費00:01:27分鐘。但使用應用程序，它給了我一個錯誤：超時過期。操作完成之前超時的時間或服務器沒有響應。

這裏是我的腳本：

-- Deleting [Table1] table if exists before creating because we don't need to keep track of records 
IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'Table1')) 
BEGIN 
    DROP TABLE [dbo].[Table1] 
END 

-- Creating [Table1] table 
CREATE TABLE [dbo].[Table1] 
(
    [Id] [int] IDENTITY(1,1) NOT NULL, 
    [ProductId] [int] NOT NULL, 
    [MyStatus] [bit] NOT NULL, 
    [IsDeleted] [bit] NOT NULL, 
    [InTime] [datetime] NULL, 
    [StoreId] [int] NOT NULL, 
    [LanguageId] [int] NOT NULL, 

    PRIMARY KEY([Id]) 
); 

DECLARE @pId int 
DECLARE @sId int 

Truncate Table [dbo].[Table1] 

Insert Into [dbo].[Table1] (ProductId, MyStatus, IsDeleted, InTime, StoreId, LanguageId) 
    select distinct 
     p.Id, 1, 1, GETDATE(), s.Id, l.Id 
    from 
     [dbo].[Store] s, [dbo].[Product] p, [dbo].[Language] as l 
    left join 
     [dbo].[StoreMapping] sm on sm.EntityId = l.Id 
    where 
     (l.LimitedToStores = 1 and s.Id in (sm.StoreId) 
     and sm.EntityName = 'Language') or l.LimitedToStores = 0 

DECLARE tempCursor CURSOR SCROLL FOR 
    select 
     p.Id, sm.StoreId 
    from 
     [dbo].[Product] as p 
    join 
     [dbo].[StoreMapping] as sm on p.Id = sm.EntityId 
    join 
     [dbo].[Store] as s on sm.StoreId=s.Id 
    where 
     p.LimitedToStores = 1 and sm.EntityName = 'Product' 

OPEN tempCursor 
FETCH FIRST FROM tempCursor INTO @pId, @sId 

WHILE @@fetch_status = 0 
BEGIN  
    UPDATE [dbo].[Table1] 
    SET IsDeleted = 0 
    WHERE ProductId = @pId AND StoreId = @sId 

    FETCH NEXT FROM tempCursor INTO @pId, @sId; 
END 

CLOSE tempCursor 

UPDATE [dbo].[Table1] 
SET IsDeleted = 0 
where ProductId in (Select p.Id 
        from [dbo].[Product] as p 
        where p.LimitedToStores = 0) 

UPDATE [dbo].[Table1] 
SET IsDeleted = 1 
where ProductId in (Select p.Id 
        from [dbo].[Product] as p 
        where p.Published = 0 OR p.Deleted = 1 
         OR p.VisibleIndividually = 0) 

DEALLOCATE tempCursor 

誰能幫助我提高這個腳本？

Answer 1

與光標的部分和循環通過它來設置IsDeleted=0在表1可以用下面的更新語句來代替：

UPDATE 
    [dbo].[Table1] 
SET 
    IsDeleted=0 
FROM 
    [dbo].[Product] AS p 
    JOIN [dbo].[StoreMapping] AS sm ON p.Id=sm.EntityId 
    JOIN [dbo].[Store] AS s ON sm.StoreId=s.Id 
    JOIN [dbo].[Table1] AS t1 ON t1.ProductId=p.Id AND t1.StoreId=s.Id 
WHERE 
    p.LimitedToStores=1 AND 
    sm.EntityName ='Product' 

最後兩個查詢好書面的JOIN

UPDATE 
    [dbo].[Table1] 
SET 
    IsDeleted=0 
FROM 
    [dbo].[Table1] AS t1 
    JOIN [dbo].[Product] AS p ON 
    p.Id=t1.ProductId 
WHERE 
    p.LimitedToStores=0 

UPDATE 
    [dbo].[Table1] 
SET 
    IsDeleted=1 
FROM 
    [dbo].[Table1] AS t1 
    JOIN [dbo].[Product] AS p ON 
    p.Id=t1.ProductId 
WHERE 
    p.Published=0 OR 
    p.Deleted=1 OR 
    p.VisibleIndividually=0