目录
- mysql存储过程 返回 list结果集
- 思路
- mysql存储过程和存储函数练习
- 存储过程和存储函数语法
- 存储函数
- 案例演示
mysql存储过程 返回 list结果集
思路
直接链接多个表返回结果集即可,先写成普通的sql调整好,不要输入参数,再写成存储过程,
不要用游标,否则会把你慢哭的
BEGIN | |
DECLARE In_StartTime VARCHAR(64); | |
DECLARE In_StopTime VARCHAR(64); | |
DECLARE IN_User_id VARCHAR(64); | |
DECLARE IN_work_no VARCHAR(20); | |
DECLARE IN_Office_id VARCHAR(64); | |
DECLARE IN_Cus_source VARCHAR(100); | |
if in_begindate is NULL or in_begindate ='' THEN | |
#set In_StartTime = timestamp(date_add(curdate(), interval - day(curdate()) + 1 day));##默认查询开始时间为当月1日 | |
set In_StartTime = DATE_FORMAT( DATE_SUB(CURDATE(), INTERVAL 1 DAY), '%Y-%m-%d 00:00:00');##默认查询开始时间为昨天开始 | |
ELSE | |
SET In_StartTime = in_begindate; | |
END IF; | |
if in_enddate is NULL or in_enddate ='' THEN | |
set In_StopTime = DATE_FORMAT( DATE_SUB(CURDATE(), INTERVAL 1 DAY), '%Y-%m-%d 23:59:59');##默认查询结束时间为昨天时间 | |
ELSE | |
SET In_StopTime = in_enddate; | |
END IF; | |
SET IN_User_id = in_userid; | |
SET IN_work_no =in_user_work_no; | |
SET IN_Office_id = in_offid; | |
SET IN_Cus_source = in_custsouce; | |
select DTA.*, | |
(case when DTB.callcount is NULL then 0 ELSE DTB.callcount END) as all_call_num, ##总呼出量 | |
(case when DTB.calllens is NULL then 0 ELSE | |
concat(concat(DTB.calllens div 3600,'时'),concat(DTB.calllens mod 3600 div 60,'分'),concat(DTB.calllens mod 3600 mod 60 mod 60,'秒')) | |
END) as all_call_time, ##总呼出时长 | |
(case when DTB.effcount is NULL then 0 ELSE DTB.effcount END) as eff_call_num, ##有效呼出量 | |
(case when DTB.effcountlens is NULL then 0 ELSE | |
concat(concat(DTB.effcountlens div 3600,'时'),concat(DTB.effcountlens mod 3600 div 60,'分'),concat(DTB.effcountlens mod 3600 mod 60 mod 60,'秒')) | |
END) as eff_call_time,## 有效呼出时长 | |
(case when DTC.exchange_num is NULL then 0 ELSE DTC.exchange_num END) as exchange_num,## 交流次数 | |
(case when DTD.summary_num is NULL then 0 ELSE DTD.summary_num END) as summary_num, ## 总结次数 | |
(case when DTE.WorkCount is NULL then 0 ELSE DTE.WorkCount END) as worksheet_num, ## 总机会点数 | |
(case when DTE.WorkQDCount is NULL then 0 ELSE DTE.WorkQDCount END) as sign_worksheet_num,##签单机会点数 | |
(CASE WHEN DTE.WorkQDCount = 0 then 0 | |
WHEN DTE.WorkCount = 0 then 0 | |
when DTE.WorkCount is NULL then 0 | |
when DTE.WorkQDCount is NULL then 0 | |
ELSE concat((ROUND( (IFNULL(DTE.WorkQDCount,0)/DTE.WorkCount),2) *100 ),'%') | |
END ) as WorkRate, ## 成功率 | |
(case when DTE.WorkSum is NULL then 0 ELSE DTE.WorkSum END) as sales_volume ##成交总金额 | |
FROM | |
( | |
## 公司相关信息和人员账号 | |
SELECT TTA.office_id,TTA.company,user_id,work_no,user_name from | |
(SELECT id as office_id, name as company FROM sys_office WHERE del_flag=0) TTA | |
LEFT OUTER JOIN | |
(SELECT id as user_id ,work_no, name as user_name,office_id from sys_user where del_flag=0 and | |
(is_disabled ='1' or is_disabled='' or ISNULL(is_disabled) ) | |
) TTB | |
ON ( TTA.office_id =TTB.office_id) WHERE | |
( TTB.user_id=IN_User_id or IN_User_id is null or IN_User_id = '') | |
and ( TTB.work_no=IN_work_no or IN_work_no is null or IN_work_no = '') | |
and ( TTB.office_id=IN_Office_id or IN_Office_id is null or IN_Office_id = '') | |
) DTA | |
LEFT OUTER JOIN | |
(##通话相关次数及时长,有效通话次数及时长 | |
SELECT TA.agent_id , | |
SUM(callcount) as callcount, | |
SUM(calllens) as calllens, | |
SUM(effcount) as effcount, | |
SUM(effcountlens) as effcountlens | |
from | |
(select agent_id, | |
(case when (agent_id is NOT NULL or times is NOT NULL) then 1 ELSE 0 END) as callcount, | |
(case when (agent_id is NOT NULL or times is NOT NULL )then times else 0 end) as calllens, | |
(case when times >=30 then 1 else 0 end) as effcount, | |
(case when times >=30 then times else 0 end) as effcountlens | |
from crm_hw_call where call_begintime >=In_StartTime and STR_TO_DATE(call_begintime,'%Y-%m-%d %H:%i:%s')<=In_StopTime | |
) TA GROUP BY TA.agent_id | |
) DTB on (DTA.work_no=DTB.agent_id) | |
LEFT OUTER JOIN | |
(## 交流次数 | |
SELECT TC.create_by,IFNULL(SUM(exchange_num),0) as exchange_num | |
FROM | |
( | |
SELECT wk.create_by, wk.user_type, | |
( CASE WHEN ex.create_by is not NULL then 1 else 0 end) as exchange_num | |
from crm_worksheet wk LEFT OUTER JOIN crm_wkst_exchange_record ex on wk.worksheet_no=ex.worksheet_no | |
where ex.create_by is not NULL and ex.del_flag=0 and wk.del_flag=0 | |
and ( wk.user_type ='sys_basic_hua_wei' or 'sys_basic_hua_wei' is null or 'sys_basic_hua_wei' = '') | |
and ex.create_date >=In_StartTime and ex.create_date<=In_StopTime | |
) TC | |
GROUP BY TC.create_by | |
) DTC on (DTA.user_id = DTC.create_by) | |
LEFT OUTER JOIN | |
(## 总结次数 | |
SELECT TD.create_by,SUM(TD.summary_num) as summary_num | |
FROM | |
(SELECT create_by, | |
(CASE WHEN create_by is not NULL then 1 else 0 end) as summary_num | |
FROM crm_day_report where del_flag=0 | |
and create_date >=In_StartTime and create_date<=In_StopTime | |
) TD GROUP BY TD.create_by | |
) DTD on (DTA.user_id = DTD.create_by) | |
LEFT OUTER JOIN | |
## 签单次数,工单总数,签单总额 | |
(SELECT | |
TE.create_by, | |
SUM(WorkCount) AS WorkCount, | |
SUM(WorkQDCount) AS WorkQDCount, | |
SUM(WorkSum) AS WorkSum | |
FROM | |
(SELECT create_by, | |
(CASE WHEN create_by is not null THEN 1 else 0 end ) as WorkCount, | |
(CASE WHEN create_by is not null and important_degree='sys_basic_qian_shu_he_tong' THEN 1 else 0 end ) as WorkQDCount, | |
(CASE WHEN create_by is not null and important_degree='sys_basic_qian_shu_he_tong' THEN IFNULL(solution,0) else 0 end ) as WorkSum | |
from crm_worksheet where del_flag=0 | |
and ( user_type =IN_Cus_source or IN_Cus_source is null or IN_Cus_source = '') | |
and create_date >=In_StartTime and create_date<=In_StopTime | |
) TE GROUP BY TE.create_by | |
) DTE ON (DTA.user_id = DTE.create_by); | |
SELECT IN_work_no,in_user_work_no; | |
END | |
##输入参数 | |
in_begindate varchar(64),in_enddate varchar(64),in_userid varchar(64),in_offid varchar(64), in_custsouce varchar(100),in_user_work_no varchar(20) | |
mysql存储过程和存储函数练习
存储过程和存储函数语法
- 创建存储过程
create procedure p1(存储名)(in suppiler_num varchar(10)) | |
begin | |
declare results int default 0; #声明变量并初始化 | |
select count(*) into results #赋值 | |
from factory.suppiler | |
where factory.suppiler.suppiler_num=suppiler_num; | |
select if (results>0,'成功','失败' ); #使用 | |
end | |
(参数列表: 模式 参数名 参数类型) | |
模式 in(默认)、out、 inout:in 模式;out 模式;inout 模式 |
- 删除存储过程
drop procedure p1 (并且只能一次删除一个存储过程)
- 更改存储过程
不能直接修改存储过程,只能先删除该过程,在重新创建该过程
- 调用存储过程
call p1('s1')
注意:因为是in 模式所有可以传入常量,如果是inout模式
不可以传入常量,而必须是变量。
- 查看存储过程
show create procedure p1
存储函数
如果是第一次在mysql上创建存储函数,可能会发生SQL错误[1418][HY000]:
This function has none of DETERMINISTIC ,NO SQL,or READS SQL DATA in its declaration and binary logging is enabled(you “might” want to use the less safe_log_bin_trust_function_creators variable)。
此时的mysql 服务器开启了二进制日志选项,这种模式是默认禁止创建存储函数的。
使用下列命令选择开启就可以了。
- 创建存储函数
create function 函数名(参数列表) returns 返回类型 | |
begin | |
函数体 | |
end | |
1、参数列表 (参数名 参数类型) | |
2、 函数体肯定有return 语句 |
- 调用存储函数
select 函数名(参数列表)
案例演示
有一简易电子商务网站,其平台数据库中部分表及其结构如下:
(1)用户表:tUser(用户账号varchar(10),用户名称varchar(50),登陆密码varchar(20),联系电话varchar(20),邮件地址varchar(100),已购商品总额numeric(10,2),送货地址varchar(100))
(2)用户登录历史记录表:tUserHisRec(登录序号int identity(1,1),用户账号varchar(10),登录时间datetime)
(3)商品列表:productsList(商品编号varchar(20),商品名称varchar(100),商品类别varchar(100),商品价格numeric(10,2),出厂日期datetiem,生产商varchar(200))
(4)用户购买商品记录:tUserOrder(登陆序号int identity(1,1),用户账号varchar(10),商品编号varchar(20),购买时间datetime,送货地址varchar(100))
-- 用户表: | |
Create table tUser | |
( /*用户账号*/ tuser_num varchar(10), | |
/* 用户名称 */tuser_name varchar(50), | |
/*登陆密码 */ tuser_password varchar(20), | |
/* 联系电话 */ tuser_tel varchar(20), | |
/* 邮箱地址 */tuser_maill varchar(100), | |
/*已购商品总额 */ tuser_sum_expence numeric(10,2), | |
/*送货地址 */ tuser_addr varchar(100) | |
) | |
--用户登录历史记录表: | |
Create table tUserHisRec ( | |
/*登录序号*/ tuserhisrec_row int auto_increment, | |
/*用户账号*/tuserhisrec_num varchar(10), | |
/*登录时间*/tuserhisrec_time datetime, | |
primary key (tuserhisrec_row) #自增必须要设键 | |
) | |
--商品列表: | |
Create table productsList( | |
/*商品编号*/ productsList_num varchar(20), | |
/*商品名称*/ productsList_name varchar(100), | |
/*商品类别 */productsList_kind varchar(100), | |
/*商品价格 */productsList_price numeric(10,2), | |
/*出厂日期 */productsList_date datetime, | |
/*生产商 */productsList_suppiler varchar(200) | |
) | |
--用户购买商品记录: | |
Create table tUserOrder( | |
/*登陆序号*/ tuserorder_row int auto_increment, | |
/*用户账号 */tuser_num varchar(10), | |
/*商品编号 */productsList_num varchar(20), | |
/*购买时间 */tuserorder_time datetime, | |
/*送货地址 */tuser_addr varchar(100), | |
primary key (tuserorder_row) | |
) |
1 创建商品检索存储过程procBrowProduct (关联子查询)
要求:输入商品名称或商品类别(要求模糊查询),输出商品编号,商品名称,商品价格,出厂日期,生产商,已购用户数量,最近一次购买用户姓名,最近一次购买时间
create procedure t2(in products_name varchar(100),in products_kind varchar(100)) | |
begin | |
select *,(select count(distinct tuser_num) from tUserOrder | |
where `productsList_num`=a.productsList_num) as '已购用户数量', | |
(select tuser_num from factory.tuserorder | |
where tuserorder_time=(select max(tuserorder_time) | |
from factory.tuserorder | |
where `productsList_num`=a.productsList_num | |
group by a.productsList_num)) as '最近一次购买的用户', | |
(select max(tuserorder_time) from factory.tuserorder | |
where `productsList_num`=a.productsList_num | |
group by a.productsList_num)as '最近一次购买的时间' | |
from factory.productslist a where `productsList_num` in | |
(select productsList_num from factory.productslist | |
where `productsList_name` like concat('%',products_name,'%') | |
and `productsList_kind` like concat('%',products_kind,'%')); | |
end |
分析:
输入的商品名称和商品类别是为了找到对应商品编号,有了商品编号就可以输出一系列信息,对应已购用户数量和最近一次购买用户姓名,和最近一次购买时间,分别使用三个子查询,而子查询与外层查询联系就是a.productsListnum作为限制条件,及关联子查询
关联子查询
给出一个简单例子引出关联子查询:查询低于相同职位平均工资的员工信息
table staff(staff_num,staff_depart,staff_salary)
select staff_num from staff a where staff_salary<( | |
select avg(staff_salary from staff | |
where staff_depart=a.staff_deapart) |
查询首先会从最外层select * from staff
在将每一行结果传递给子查询,传入第一行结果就是select staff_num from staff where staff_salary<(select avg(staff_salary from staff where staff_depart=‘经理’)),然后子查询的结果又返回给外层查询select staff_num from staff where staff_salary<9666。逐行逐行,直到结束。
关联子查询,外层与内层查询是信息是双向传递的。
2 创建商品检索存储过程t1
要求:输入商品名称或商品类别(要求模糊查询),输出商品编号,商品名称,商品价格,出厂日期,生产商,已购用户数量,最近一次购买用户姓名,最近一次购买时间
create procedure t1(in use_num varcharacter(10),in product_num varcharacter(20)) | |
begin | |
declare tuser_addr1 varchar(100) ; | |
declare productsList_price1 numeric(10,2); | |
select tuser_addr into tuser_addr1 | |
from tUser | |
where tUser.tuser_num=use_num; | |
select productsList_price into productsList_price1 | |
from factory.productsList | |
where productsList_num=product_num; | |
update tUser | |
set tuser_sum_expence=tuser_sum_expence+productsList_price1 | |
where tuser_num=use_num; | |
insert into factory.tuserOrde(tuser_num,productsList_num,tuserorder_time,tuser_addr) | |
values(use_num,product_num,now(),tuser_addr1); | |
end |
这个比较简单。
3 创建用户自定义函数:varchar fGetUserMaxProduct(用户账号)(在查询结果子表中在进行查询)
要求:输入用户账号,返回该用户购买最多的商品编号。
create function t3(user_num varchar(10)) returns varchar(20) | |
begin | |
declare products_num varchar(20); | |
select `productsList_num` into products_num from | |
(select count(`productsList_num`)as c1,`productsList_num` | |
from factory.tuserorder where tuser_num=user_num | |
group by `productsList_num`)as t1 having max(c1); | |
return products_num; | |
end |
分析:
将查询结果设成别名为t1 的表,再重t1的表中,在继续查询。
查询结果子表中,再查询
例如:
select a from (select a,b,c from table1 where…)as t1
从t1结果表中查询a