oracle 存储过程 转换为mysql存储过程 实例总结 （数据库有感篇一）
最近在接触数据库的有关知识，因为水平有限，对数据库方面的一些知识缺乏了解，这次遇见的主要是 数据库的存储过程，根据公司项目需求，将oracle的存储过程切换为mysql的存储过程，首先oracle的存储过程与mysql的存储过程差别是很大的（语法差别很大），通过好多天的网上查询资料，与同事们的交流，简单的实现了基本的转换，在这里肯定还有一些错误的地方，也欢迎各位大牛指出，让我更加深入的了解 数据库的存储过程，有疑问的大家也可以一起交流进步。
下面就进入这次的话题：oracle 存储过程 转换为mysql存储过程 实例总结
首先我门先看一下我最近大致转换的存储过程的一个例子代码，首先是原始的 oracle的存储过程：
CREATE OR REPLACE PROCEDURE xp_stat_BigDiseaseAnalyse(
v_beginDate varchar2, --统计开始日期，格式：yyyyMMdd
v_endDate varchar2, --统计结束日期, 格式：yyyyMMdd
v_orgCode varchar2, --检查医疗机构
v_dataCur out PK_base.cur, --返回结果集
v_total out number, --返回查询记录总数
v_msg out varchar2 --返回查询记录总数
) is
v_sql varchar2(5000);
begin
v_sql := 'select * from ( select max(ehr.forg_code) forg_code , ''冠心病'' fdiag_name ,count(a.fehrid) FDiseaseCount,sum(famount)
famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001''
and a.fdiag_name like ''%冠心病%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || ''' ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code, ''椎基底供血不足'' fdiag_name,count(a.fehrid)
FDiseaseCount,sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%椎基底供血不足%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || ''' ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code, ''糖尿病'' fdiag_name,count(a.fehrid) FDiseaseCount,sum
(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%糖尿病%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || ''' ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code, ''脑出血'' fdiag_name,count(a.fehrid) FDiseaseCount,sum
(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%脑出血%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || ''' ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code, ''无指征剖腹产分娩'' fdiag_name,count(a.fehrid)
FDiseaseCount,sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%无指征剖腹产分娩%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || ''' ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code, ''肺炎'' fdiag_name,count(a.fehrid) FDiseaseCount,sum
(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%肺炎%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || ''' ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code, ''肺恶性肿瘤'' fdiag_name,count(a.fehrid)
FDiseaseCount,sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%肺恶性肿瘤%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || ''' ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code, ''高血压'' fdiag_name,count(a.fehrid) FDiseaseCount,sum
(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%高血压%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || ''' ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
end if;
v_sql := v_sql || ' union select max(ehr.forg_code) forg_code, ''乳腺恶性肿瘤'' fdiag_name,count(a.fehrid)
FDiseaseCount,sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%乳腺恶性肿瘤%''
and ehr.fehr_date >= ''20160301''
and ehr.fehr_date <= ''' || v_endDate || ''' ';
if v_orgCode is not null then
v_sql := v_sql || ' and ehr.forg_code =''' || v_orgCode || ''' ) tt where tt.FDiseaseCount>0 order by tt.FDiseaseCount desc';
end if;
open v_dataCur for v_sql;
exception
when others then
pk_base.xp_saveLog(sqlcode,
sqlerrm,
'pk_stat.xp_stat_BigDiseaseAnalyse',
'大病补偿统计出错');
open v_dataCur for
select * from dual where 1 = 2;
end;DROP PROCEDURE IF EXISTS xp_stat_BigDiseaseAnalyse;
CREATE PROCEDURE xp_stat_BigDiseaseAnalyse(
v_beginDate varchar(100), -- 统计开始日期，格式：yyyyMMdd
v_endDate varchar(100), -- 统计结束日期, 格式：yyyyMMdd
v_orgCode varchar(50), -- 检查医疗机构
-- v_dataCur PK_base.cur, --返回结果集
out v_total int, -- 返回查询记录总数
out v_msg varchar(100) -- 返回查询记录总数
)
begin
DECLARE v_sql varchar(5000);
DECLARE iPos int;
DECLARE iCount int;
DECLARE v_sqltmp varchar(420);
DECLARE CONTINUE HANDLER FOR SQLEXCEPTION
begin
CALL xp_saveLog(@sqlcode,@sqlerrm,'pk_him.xp_stat_BigDiseaseAnalyse','大病补偿统计出错');
COMMIT;
end;
-- =================================================== 异常处理结束
SET v_sql = CONCAT(' select * from (select max(ehr.forg_code) forg_code , ''冠心病'' fdiag_name ,count(a.fehrid) FDiseaseCount,SUM(famount)
famount,SUM(famount_insurance) famount_insurance,SUM(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001''
and a.fdiag_name like ''%冠心病%''
and ehr.fehr_date >= ''' , v_endDate , '''');
SET v_sql = CONCAT(v_sql,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');
if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;
-- =================================================脑出血=======================================================
SET v_sqltmp = CONCAT(' union select max(ehr.forg_code) forg_code, ''脑出血'' fdiag_name,count(a.fehrid) FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%脑出血%''
and ehr.fehr_date >=''' , v_endDate , '''');
SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');
if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;
-- ==========================================椎基底供血不足==============================================================
SET v_sqltmp = CONCAT(' union select max(ehr.forg_code) forg_code, ''椎基底供血不足'' fdiag_name,count(a.fehrid)FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%椎基底供血不足%''
and ehr.fehr_date >=''' , v_endDate , '''');
SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');
if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;
-- ========================================糖尿病================================================================
SET v_sqltmp = CONCAT(' union select max(ehr.forg_code) forg_code, ''糖尿病'' fdiag_name,count(a.fehrid) FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%糖尿病%''
and ehr.fehr_date >=''' , v_endDate , ''' ');
SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');
if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;
-- ========================================================================================================
SET v_sqltmp = CONCAT('union select max(ehr.forg_code) forg_code, ''无指征剖腹产分娩'' fdiag_name,count(a.fehrid)FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%无指征剖腹产分娩%''
and ehr.fehr_date >= ''' , v_endDate , ''' ');
SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');
if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;
-- =======================================================肺炎=================================================
SET v_sqltmp = CONCAT(' union select max(ehr.forg_code) forg_code, ''肺炎'' fdiag_name,count(a.fehrid) FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%肺炎%''
and ehr.fehr_date >=''' , v_endDate , ''' ');
SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');
if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;
-- ===============================================肺恶性肿瘤=========================================================
SET v_sqltmp = CONCAT(' union select max(ehr.forg_code) forg_code, ''肺恶性肿瘤'' fdiag_name,count(a.fehrid) FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%肺恶性肿瘤%''
and ehr.fehr_date >=''' , v_endDate , '''');
SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');
if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;
-- ================================================高血压========================================================
SET v_sqltmp = CONCAT(' union select max(ehr.forg_code) forg_code, ''高血压'' fdiag_name,count(a.fehrid) FDiseaseCount,
sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%高血压%''
and ehr.fehr_date >=''' , v_endDate , '''');
SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');
if (v_orgCode is not null and v_orgCode !='' ) then
-- SET v_sql = v_sql || ' and ehr.forg_code =''' || v_orgCode || '''';
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,'''');
end if;
-- ============================================乳腺恶性肿瘤============================================================
SET v_sqltmp = CONCAT(' union select max(ehr.forg_code) forg_code, ''乳腺恶性肿瘤'' fdiag_name,count(a.fehrid)
FDiseaseCount,sum(famount) famount,sum(famount_insurance) famount_insurance,sum(famount_self) famount_self
from tbl_ehr_comm_disease a
join tbl_ehr_archives ehr on ehr.fid=a.fehrid
join tbl_ehr_zy_payway pay on pay.fehrid=a.fehrid
where ehr.fdata_type=''3001'' and a.fdiag_name like ''%乳腺恶性肿瘤%''
and ehr.fehr_date >=''' , v_endDate , ''' ');
SET v_sql = CONCAT(v_sql,v_sqltmp,v_beginDate,' '' and ehr.fehr_date <= ''',v_endDate,'''');
if (v_orgCode is not null and v_orgCode !='' ) then
SET v_sql = CONCAT(v_sql,' and ehr.forg_code = ''',v_orgCode,' '' ');
end if;
SET v_sql = CONCAT(v_sql,' ) tt order by tt.FDiseaseCount desc');
-- where tt.FDiseaseCount>0
-- 创建临时表
create temporary table if not exists tmpTab(
FID int not null auto_increment,
forg_code varchar(20),
fdiag_name varchar(50),
fDiseaseCount decimal(19,0),
fAmount decimal(19,2),
famount_insurance decimal(19,2),
famount_self decimal(19,2),
primary key (FID)
) ;
truncate TABLE tmpTab;
-- SET v_sql = 'insert into tmpTab(forg_code,fdiag_name,FDiseaseCount,famount,famount_insurance,famount_self) ' || v_sql;
SET v_sql = CONCAT('insert into tmpTab(forg_code,fdiag_name,FDiseaseCount,famount,famount_insurance,famount_self) ',v_sql);
set @s_sql = v_sql;
prepare stmt from @s_sql;
execute stmt;
SELECT * from tmpTab;
end通过大致阅读上面的代码，我们可以发现，不同的地方有很多，不单单从字面上，从逻辑上也有很多不同之处。
为了更加直观的说明不同之处，下面列出一个表格来大致说明：
| 区别 | oracle | mysql |
| 创建存储过程的语句不同 | CREATE OR REPLACE PROCEDURE 存储过程名称() | DROP PROCEDURE IF EXISTS xp_stat_BigDiseaseAnalyse; CREATE PROCEDURE 存储过程名称() |
| 参数的不同（参数类型，出参入参格式，） | 1.入参（类型前加in 可以省略不写），出参必须在参数类型前加 out 2.字符类型为varchar2，后边不用初始化参数大小； 数字类型为number，不用初始化参数大小； decimal类型，decimal（5,2）表示位数一共有5位，小数点后有两位； PK_base.cur 为游标类型。 其他的数据类型请参考：oracle数据类型 |
1.入参（类型前加in也可以省略不写），出参必须在参数前加out（注意与oracle的区别） 2.字符类型为varchar，后面必须初始化参数大小； 数字类型有int，bigint等； decimal类型，这个和oracle一样。 详细的其他的数据类型请参考：mysql数据类型 |
| 变量的定义方式 | 1.定义：直接在存储过程的的创建语句中声明变量，以及类型。 2.变量的赋值：变量名 := 赋值内容 即可。 |
1.定义:使用declare语句，例如： declare v_sql varchar(5000) 定义一个大小为5000 字符变量 v_sql 2.变量的赋值： set 变量名= 赋值内容 |
| 字符串连接的方式 | oracle中使用 || 连接字符串， 例如:v_sql :='woshi' || 'zifuchuan' 则，v_sql的值为 woshizifuchuan |
mysql中字符串的连接使用caoncat（）函数， 例如： set v_sql=concat('woshi','zifuchuan') v_sql 的值为 woshizifuchuan |
| 游标的问题 | 详细参见:oracle游标使用 | 详细参见：mysql游标使用 |
| 分页查询的问题 | oracle中分页查询主要依赖于rownum（它是一个Oracle中的系统变量，无需定义即可使用，有特定的含义）。详细的分页查询例子参见： oracle分页查询 |
mysql中的分页查询，主要依赖limit语句来实现 limit 1,10 意思就是从第一行开始查询，查询10个记录。例如： mysql中分页查询有两种方式, 一种是使用COUNT(*)的方式,具体代码如下 |
| 异常处理 | 当存储过程语句执行错误，或者查询不到数据等情况出现时，就该设置异常，对异常进行处理。 oracle异常处理详见：oracle异常处理 |
当存储过程语句执行错误，或者查询不到数据等情况出现时，就该设置异常，对异常进行处理。 mysql异常处理详见：mysql异常处理 |
| 条件语句 | if then else 等 具体实例参考：oracle if语句 | 详见：mysql中if语句的使用 |
| 函数的区别 （具体如日期转换函数等） | 有时涉及到日期的转换（比如格式），有时要返回一个日期中的月份，第几天等等，都需要使用函数来实现.详见：oracle函数小结 | 本次涉及到的mysql函数有concat，以及一些日期转换函数。 其他的函数参考：mysql日期函数小结 |
| 单引号，双引号问题 | 详见:oracle单引号双引号 | 详见：mysql单引号双引号 |
| 注释的问题 | oracle注释： --注释内容 | mysql注释： -- 注释内容 （--后面比oracle多一个空格） |
| 可否打包 | oracle的存储过程可以，装在一个包中，即一个包中可以存在多个存储过程。 | mysql不可以打包 |
通过上述大致的介绍，也许会有点收获，但是错误之处请各位指出。