????? 之前總是在MSSQL上寫存儲過程，沒有在MYSQL上寫過，也基本沒有用過，今天需要用到MYSQL，研究了下，把項目的需要的存儲過程寫了一部分，寫一下工作總結。這里沒有給出數(shù)據(jù)庫結構，不討論SQL語句的細節(jié)，主要探討存儲過程語法，適合有基礎的人。
?發(fā)表地址： http://www.cnblogs.com/zxlovenet/p/3783136.html
#查詢文章回復
--
----------------------------
--
Procedure structure for `sp_select_reply_article`
--
----------------------------
DROP
PROCEDURE
IF
EXISTS
`sp_select_reply_article`;
DELIMITER ;;
CREATE
DEFINER
=
`root`@`localhost`
PROCEDURE
`sp_select_reply_article`(
IN
`ra_id`
int
,
IN
`pagefrom`
int
,
IN
`pagesize`
int
)
BEGIN
#Routine body goes here...
SET
@ra_id
=
ra_id;
SET
@pagefrom
=
pagefrom;
SET
@pagesize
=
pagesize;
SET
@ssra
=
CONCAT(
'
SELECT * FROM gk_article WHERE id = ? LIMIT ?,?
'
);
PREPARE
sqlquery
FROM
@ssra
;
EXECUTE
sqlquery USING
@ra_id
,
@pagefrom
,
@pagesize
;
END
;;
DELIMITER ;
?
#技術點1：MySql5.1不支持LIMIT參數(shù)（MySql5.5就支持了），如果編寫存儲過程時使用LIMIT做變量，那是需要用動態(tài)SQL來構建的，而這樣做性能肯定沒有靜態(tài)SQL好。主要代碼如下：
???????? SET @ssra = CONCAT('SELECT * FROM gk_article WHERE id = ? LIMIT ?,?');
???????? PREPARE sqlquery FROM @ssra;
???????? EXECUTE sqlquery USING @ra_id,@pagefrom,@pagesize;
?
#技術點2：如果同時需要返回受影響行數(shù)需要在語句后面添加語句：ROW_COUNT()函數(shù)，兩條語句之間需要“;”分隔。
??發(fā)表地址： http://www.cnblogs.com/zxlovenet/p/3783136.html
#更新數(shù)據(jù)
--
----------------------------
--
Procedure structure for `sp_update_permission`
--
----------------------------
DROP
PROCEDURE
IF
EXISTS
`sp_update_permission`;
DELIMITER ;;
CREATE
DEFINER
=
`root`@`localhost`
PROCEDURE
`sp_update_permission`(
IN
`puser_uid`
varchar
(
20
),
IN
`plevel`
int
,
IN
`ppower`
int
)
BEGIN
#Routine body goes here...
SET
@puser_uid
=
puser_uid;
SET
@plevel
=
plevel;
SET
@ppower
=
ppower;
UPDATE
gk_permission
SET
`
level
`
=
@plevel
,
power
=
@ppower
WHERE
user_uid
=
CONVERT
(
@puser_uid
USING utf8) COLLATE utf8_unicode_ci;
END
;;
DELIMITER ;
?
#技術點3：MySQL進行字符串比較時發(fā)生錯誤（Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '='），解決方法：將比較等式一邊進行字符串轉換，如改為“CONVERT(b.fullCode USING utf8) COLLATE utf8_unicode_ci”，主要代碼如下：
???????? UPDATE gk_permission SET `level` = @plevel, power = @ppower WHERE user_uid = CONVERT(@puser_uid USING utf8) COLLATE utf8_unicode_ci;
?
#插入數(shù)據(jù)
--
----------------------------
--
Procedure structure for `sp_insert_user`
--
----------------------------
DROP
PROCEDURE
IF
EXISTS
`sp_insert_user`;
DELIMITER ;;
CREATE
DEFINER
=
`root`@`localhost`
PROCEDURE
`sp_insert_user`(
IN
`uid`
varchar
(
20
),
IN
`upw`
varchar
(
32
),
IN
`name`
varchar
(
20
),
IN
`sex`
int
,
IN
`phone`
varchar
(
20
),
IN
`u_id`
int
,
IN
`s_id`
int
,
IN
`j_id`
int
)
BEGIN
#Routine body goes here...
SET
@uid
=
uid;
SET
@upw
=
upw;
SET
@uname
=
uname;
SET
@sex
=
sex;
SET
@phone
=
phone;
#由于外鍵約束，所以添加的外鍵字段需要在對應外鍵所在表有相應數(shù)據(jù)
SET
@u_id
=
u_id;
SET
@s_id
=
s_id;
SET
@j_id
=
j_id;
SET
@verifytime
=
DATE(
'
0000-00-00
'
);
INSERT
INTO
gk_user(uid,upw,uname,sex,phone,u_id,s_id,j_id,verifytime)
VALUES
(
@uid
,
@upw
,
@uname
,
@sex
,
@phone
,
@u_id
,
@s_id
,
@j_id
,
@verifytime
);
#查詢結果會自動返回受影響行數(shù)
END
;;
DELIMITER ;
??發(fā)表地址： http://www.cnblogs.com/zxlovenet/p/3783136.html
#根據(jù)ID刪除數(shù)據(jù)
--
----------------------------
--
Procedure structure for `sp_delete_exchange_by_id`
--
----------------------------
DROP
PROCEDURE
IF
EXISTS
`sp_delete_exchange_by_id`;
DELIMITER ;;
CREATE
DEFINER
=
`root`@`localhost`
PROCEDURE
`sp_delete_exchange_by_id`(
IN
`eid`
int
)
BEGIN
#Routine body goes here...
SET
@eid
=
eid;
DELETE
FROM
gk_exchange
WHERE
id
=
@eid
;
END
;;
DELIMITER ;
?
#通過賬號查詢用戶或者管理員
--
----------------------------
--
Procedure structure for `sp_select_user_by_uid`
--
----------------------------
DROP
PROCEDURE
IF
EXISTS
`sp_select_user_by_uid`;
DELIMITER ;;
CREATE
DEFINER
=
`root`@`localhost`
PROCEDURE
`sp_select_user_by_uid`(
IN
`uid`
varchar
(
20
),
IN
`getAdmin`
int
)
BEGIN
#Routine body goes here...
SET
@uid
=
uid;
#
SET
@getadmin
=
getAdmin;
#查詢管理員
IF
(getAdmin
=
1
)
THEN
SELECT
us.
*
, un.`name`, se.`name`, jo.`name`, pe.`
level
`, pe.
power
FROM
gk_user
AS
us, gk_unit
AS
un, gk_section
AS
se, gk_jobtitle
AS
jo, gk_permission
AS
pe
WHERE
us.u_id
=
un.id
AND
us.s_id
=
se.id
AND
us.j_id
=
jo.id
AND
us.uid
=
pe.user_uid
AND
us.uid
=
CONVERT
(
@uid
USING utf8) COLLATE utf8_unicode_ci;
END
IF
;
#查詢用戶
IF
(getAdmin
=
0
)
THEN
SELECT
us.
*
, un.`name`, se.`name`, jo.`name`
FROM
gk_user
AS
us, gk_unit
AS
un, gk_section
AS
se, gk_jobtitle
AS
jo
WHERE
us.u_id
=
un.id
AND
us.s_id
=
se.id
AND
us.j_id
=
jo.id
AND
us.uid
=
CONVERT
(
@uid
USING utf8) COLLATE utf8_unicode_ci;
END
IF
;
END
;;
DELIMITER ;
?
#技術點4：這個存數(shù)過程需要用到控制語句（if else elseif while loop repeat leave iterate）。
???????? IF (getAdmin = 1) THEN
?????????????????? #語句…
???????? END IF;
??發(fā)表地址： http://www.cnblogs.com/zxlovenet/p/3783136.html
#技術點5：在傳入?yún)?shù)不匹配的情況下報錯（Column count doesn't match value count at row 1），這個就是細心問題了，詳細檢查參數(shù)吧。
?
#技術點6：獲取當前時間的函數(shù)：NOW()
?
#技術點7：“`”這個符號是反單引號，兩個反單引號夾起來的會被當做變量，一般是在定義字段時遇到關鍵字沖突的時候會用到。
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