到新公司先看了看數據庫的性能，查看一個存儲占用的CPU巨多，而且執行次數也特別多，打開一看：
alter
?
PROCEDURE
?
[
dbo
]
.
[
IPLogInsert
]
?
???
@IP
?
char
(
15
)?
=
?
'
255.255.255.255
'
?
?
AS
?
?
BEGIN
??
?
SET
?NOCOUNT?
ON
;??
declare
?
@currId
?
int
??
declare
?
@today
?
datetime
??
--
SET?@currID?=?0??
SET
?
@today
?
=
?
getdate
()?????
SELECT
?
@currId
?
=
?id????
from
?IPLog????
where
?
convert
(
char
(
10
),?
@today
,
101
)?
=
?
convert
(
char
(
10
),AccessTime,?
101
)????
and
?
@IP
?
=
?IP??
if
(?
@currID
?
=
?
0
)??
?
insert
?
into
?IPLog?(AccessTime,IP,
[
Count
]
)???
?
values
?(
@today
,?
@IP
,?
1
)?
?
else
???
?
update
?IPLog????
?
SET
?
[
count
]
=
[
count
]
+
1
???
?
WHERE
?
convert
(
char
(
10
),?
@today
,
101
)?
=
?
convert
(
char
(
10
),AccessTime,?
101
)?????
and
?
@IP
?
=
?IP?
?
END
??
很是汗顏啊！一個簡單的需求被寫成了這樣。
最后我改成的是：
update
?IPlog?
set
?
Count
?
=
?
Count
+
1
?
where
?Ip?
=
?
@IP
?
and
?AccessTime?
between
?
dateadd
(
day
,
1
,
datediff
(
day
,
0
,
@today
-
1
))?
and
??
dateadd
(
day
,
1
,
datediff
(
day
,
0
,
@today
))
if
(
@@rowcount
?
=
0
)
begin
????
insert
?
into
?IPLog?(AccessTime,IP,
[
Count
]
)???
values
?(
@today
,
@IP
,
1
)
前一個是將字段轉成了char然后再比較，很無賴啊。
alter
?
PROCEDURE
?
[
dbo
]
.
[
IPLogInsert
]
?
???
@IP
?
char
(
15
)?
=
?
'
255.255.255.255
'
?
?
AS
?
?
BEGIN
??
?
SET
?NOCOUNT?
ON
;??
declare
?
@currId
?
int
??
declare
?
@today
?
datetime
??
--
SET?@currID?=?0??
SET
?
@today
?
=
?
getdate
()?????
SELECT
?
@currId
?
=
?id????
from
?IPLog????
where
?
convert
(
char
(
10
),?
@today
,
101
)?
=
?
convert
(
char
(
10
),AccessTime,?
101
)????
and
?
@IP
?
=
?IP??
if
(?
@currID
?
=
?
0
)??
?
insert
?
into
?IPLog?(AccessTime,IP,
[
Count
]
)???
?
values
?(
@today
,?
@IP
,?
1
)?
?
else
???
?
update
?IPLog????
?
SET
?
[
count
]
=
[
count
]
+
1
???
?
WHERE
?
convert
(
char
(
10
),?
@today
,
101
)?
=
?
convert
(
char
(
10
),AccessTime,?
101
)?????
and
?
@IP
?
=
?IP?
?
END
??
很是汗顏啊！一個簡單的需求被寫成了這樣。
最后我改成的是：
update
?IPlog?
set
?
Count
?
=
?
Count
+
1
?
where
?Ip?
=
?
@IP
?
and
?AccessTime?
between
?
dateadd
(
day
,
1
,
datediff
(
day
,
0
,
@today
-
1
))?
and
??
dateadd
(
day
,
1
,
datediff
(
day
,
0
,
@today
))
if
(
@@rowcount
?
=
0
)
begin
????
insert
?
into
?IPLog?(AccessTime,IP,
[
Count
]
)???
values
?(
@today
,
@IP
,
1
)
前一個是將字段轉成了char然后再比較，很無賴啊。
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