[英]SQL Server Stored Procedure IF Exist Update Else Insert
我在本地創建了一個存儲過程(IF Exist Update Else Insert)
當我執行該過程時,它無法插入或更新任何數據,SQL Server顯示查詢已成功運行。
表:
CREATE TABLE Laptops
(
Brand varchar(50),
Series varchar(50),
Model varchar(50),
Gener int,
Ram int,
HDD int,
Processor varchar(50),
Clock float,
Graphic_Chip varchar(50),
Graphic_Memory int,
Qty int,
Price int
PRIMARY KEY (Brand,Series,Model,Gener,Ram,HDD,Processor,Clock,Graphic_Chip,Graphic_Memory)
)
存儲過程:
CREATE PROCEDURE Insert_Inventory
(
@Brand Varchar(50),
@Series Varchar(50),
@Model Varchar(50),
@Gener int,
@Ram int,
@HDD int,
@Processor Varchar(50),
@Clock float,
@Graphic_Chip Varchar(50),
@Graphic_Memory int,
@Qty int,
@Price int
)
AS
IF EXISTS (SELECT * FROM Laptops
WHERE Brand = @Brand
and Series = @Series
and Model = @Model
and Gener = @Gener
and ram = @Ram
and hdd = @HDD
and Processor = @Processor
and Clock = @Clock
and Graphic_Chip = @Graphic_Chip
and Graphic_Memory = @Graphic_Memory)
BEGIN
UPDATE Laptops
SET
Qty = Qty + @Qty,
Price = @Price
WHERE
Brand = @Brand
and Series = @Series
and Model = @Model
and Gener = @Gener
and ram = @Ram
and hdd = @HDD
and Processor = @Processor
and Clock = @Clock
and Graphic_Chip = @Graphic_Chip
and Graphic_Memory = @Graphic_Memory
END
ELSE
BEGIN
INSERT into Laptops
VALUES (@Brand, @Series, @Model, @Gener, @Ram, @HDD, @Processor, @Clock, @Graphic_Chip, @Graphic_Memory, @Qty, @Price)
END
執行
exec Insert_Inventory 'Dell', 'Inspiron', '14', 3, 4, 500, 'Core_i_5', 2.7, 'NVIDIA', 512, 20, 42000
你必須把你的SP包裝成BEGIN
& END
,你就錯過了。 並且在Select Statement
檢查IF Exist
時也使用1.並且還檢查,某些事務是打開但不提交。 您也可以使用SQL MERGE更新和插入語句,而不是這樣做。
CREATE PROCEDURE Insert_Inventory
(
@Brand Varchar(50),
@Series Varchar(50),
@Model Varchar(50),
@Gener int,
@Ram int,
@HDD int,
@Processor Varchar(50),
@Clock float,
@Graphic_Chip Varchar(50),
@Graphic_Memory int,
@Qty int,
@Price int
)
AS
BEGIN
IF EXISTS (SELECT 1 FROM Laptops
WHERE Brand=@Brand
and Series=@Series
and Model=@Model
and Gener=@Gener
and ram=@Ram
and hdd=@HDD
and Processor=@Processor
and Clock=@Clock
and Graphic_Chip=@Graphic_Chip
and Graphic_Memory=@Graphic_Memory
)
BEGIN
UPDATE Laptops set qty=qty+@Qty, Price=@Price
WHERE Brand=@Brand
and Series=@Series
and Model=@Model
and Gener=@Gener
and ram=@Ram
and hdd=@HDD
and Processor=@Processor
and Clock=@Clock
and Graphic_Chip=@Graphic_Chip
and Graphic_Memory=@Graphic_Memory
END
ELSE
BEGIN
INSERT into Laptops Values (@Brand,@Series,@Model,@Gener,@Ram,@HDD,@Processor,@Clock,@Graphic_Chip,@Graphic_Memory,@Qty,@Price)
END
END
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