????5???????淶?????

????????????????+????????????????Customer_Update????????????????????????????????洢????????????????????????????洢?????ú??????????п?????????????????????????洢??????????????????????п????????淶???????????????????????UpdateCustomer??洢?????

????6??????????????????????????????????????CTE???????????????????????????

??????????????????SQL Server?????????????????????????????е?INSERT????????????????????????Ч????????????????1000????????????????????Ч????????????????

????????????????д??????δ?1000Ч?????????10??100?????棬??????????????????????????1.

????????1.????????????

CREATE TABLE dbo.TestInsert
(
 Number INT PRIMARY KEY
);
--?????????????????????45??
DECLARE @index INT;
SET @index = 1;

WHILE @index <= 100000
BEGIN
 INSERT dbo.TestInsert(Number) VALUES( @index);
 SET @index = @index + 1;
END

 

--????????????????????????????????????1??
BEGIN TRAN
DECLARE @index INT;
SET @index = 1;

WHILE @index <= 100000
BEGIN
 INSERT dbo.TestInsert(Number) VALUES( @index);
 SET @index = @index + 1;
END

COMMIT

--????????10W?У????0??????????????100W?н??в???
INSERT dbo.TestInsert(Number)
 SELECT TOP (100000) rn = ROW_NUMBER() OVER
  (ORDER BY c1.[object_id])
  FROM sys.columns AS c1
  CROSS JOIN sys.columns AS c2
  CROSS JOIN sys.columns AS c3
  ORDER BY c1.[object_id];


--CTE????????????????????С?????????????????:
WITH cte AS(
 SELECT TOP (100000) rn = ROW_NUMBER() OVER
  (ORDER BY c1.[object_id])
  FROM sys.columns AS c1
  CROSS JOIN sys.columns AS c2
  CROSS JOIN sys.columns AS c3
  ORDER BY c1.[object_id]
)
INSERT dbo.TestInsert(Number) SELECT rn FROM cte