插入和更新在SQL Server一個查詢2005

Question

可能重複：
Select/Insert version of an Upsert: is there a design pattern for high concurrency?

我必須從一個表中插入數據到另一個條件的基礎上。

1.If Key is found update records 
2.If key is not found insert the record. 

我使用SQL Server 2005的所以不能用merge聲明。請建議的替代方案來實現這一

Answer 1

複製從SourceTable到DesitinationTable：

update dst 
set  col1 = src.col1 
from DestinationTable dst 
join SourceTable src 
on  src.Key = dst.Key 

insert DestinationTable 
     (Key, col1) 
select Key 
,  col1 
from SourceTable src 
where not exists 
     (
     select * 
     from DestinationTable dst 
     where src.Key = dst.Key 
     ) 

Answer 2

IF EXISTS(--Query to check for the existence of your condition here) 
BEGIN 
    --UPDATE HERE 
END ELSE 
BEGIN 
    --INSERT HERE 
END 

Answer 3

這裏是my answer to the similar question

CREATE PROCEDURE dbo.update_table1 
    @Field1 int, --key1 
    @Field2 int, --data fields 
    @Field3 int, 
    @Field4 int 

    AS 

    SET NOCOUNT ON 
    update table1 set Field2=@Field2,Field3=@Field3,Field4=@Field4 
      where Field1=@Field1; 
    IF(@@Rowcount=0) 
    BEGIN 
     insert into table1(Field1,Field2,Field3,Field4) 
        values (@Field1,@Field2,@Field3,@Field4); 
    END 
    GO