1. 增加唯一性约束

alter table t_pat_patent ADD unique(no)

2.删除重复记录只保留一条

DELETE 
FROM 
t_pat_patent 
WHERE 
id IN ( 
SELECT 
id 
FROM 
( 
SELECT 
max(id) AS id, 
count(no) AS count 
FROM 
t_pat_patent 
GROUP BY 
no 
HAVING 
count > 1 
ORDER BY 
count DESC 
) AS tab 
) and proposalCode in ('20160118100704777','20160114101125115','20151119150703372','20160122081524664')

3.更新显示名

update t_sys_user ,viewnameinfo

set t_sys_user.displayname = viewnameinfo.viewName
where
 `t_sys_user`.staffId = viewnameinfo.staffid ;

update t_sys_user user set user.displayname =
(select viewName from viewnameinfo v where `user`.staffId = v.staffid) ;

UPDATE t_sys_user USER
 
SET USER .displayname = (
 
SELECT
 
case when viewName is null then `user`.displayname else viewName end
 
FROM
 
viewnameinfo v
 
WHERE
 
`user`.staffId = v.staffid
 
)

4.事务

start transaction;
commit ;

5.锁表

LOCK TABLES `t_bpm_process_task` WRITE;
UNLOCK TABLES;

6.mysql查询区分大小写 BINARY

select count(id) from t_per_staffinfo staffinfo where BINARY staffinfo.idCard
		= #{idCard}

7.release迁移sql

##需要提供目标库processdefineid  源库processdefineid 
##定义目标库变量
##查询sql为  目标库执行sql 结果集copy 到下发
select CONCAT("SET @processdefineid = '",a.id,"',@deploymentid = '",a.deploymentId,"',@formdefineid = '",b.formDefineId,"';") from t_bpm_process_define a left join t_bpm_node_set b on a.id=b.processDefineId where a.id= ?
##定义源库变量   源数据库结果集
select CONCAT("SET @SRCprocessdefineid = '",id,",@SRCdeployId = '",deploymentId,"';") from t_bpm_process_define where id= ?
##目标库结果集
##源数据库结果集
##同步经办人 
SELECT
CONCAT(
"insert into t_bpm_user_assign VALUES('",
id,
"','" ,@deploymentid,
"',",
"'",
activityName,
"',",
"'",
ifnull(roleId, ''),
"',",
"'",
ifnull(roleName, ''),
"',",
"'",
ifnull(userId, ''),
"',",
"'",
ifnull(username, ''),
"',",
"'",
ifnull(isSigned, ''),
"',",
"'",
ifnull(isForm, ''),
"',",
"'",
ifnull(chooseRule, ''),
"',",
"'",
ifnull(positionId, ''),
"',",
"'",
ifnull(positionName, ''),
"',",
"'",
ifnull(createTime, ''),
"',",
"'",
ifnull(modifyTime, ''),
"',",
"'",
ifnull(createUserCode, ''),
"',",
"'",
ifnull(modifyUserCode, ''),
"',",
"'",
ifnull(fieldName, ''),
"');"
) AS INSERT_SQL
FROM
t_bpm_user_assign
WHERE
deployId IN (
SELECT
deploymentid
FROM
t_bpm_process_define
WHERE
id = @SRCprocessdefineid
)
UNION
##同步条件
SELECT
CONCAT(
"insert into t_bpm_decision VALUES('",
id,
"','" ,@deploymentid,
"',",
"'",
ifnull(activityName, ''),
"',",
"'",
ifnull(ruleExpression, ''),
"');"
) AS INSERT_SQL
FROM
t_bpm_decision
WHERE
deployId IN (
SELECT
deploymentid
FROM
t_bpm_process_define
WHERE
id = @SRCprocessdefineid
)
UNION
## 同步表单权限
SELECT
CONCAT(
"insert into t_bpm_form_rights VALUES('",
id,
"',",
"'" ,@formdefineid,
"',",
"'" ,@processdefineid,
"',",
"'",
ifnull(activityName, ''),
"',",
"'",
ifnull(permission, ''),
"',",
"'",
ifnull(NAME, ''),
"',",
"'",
ifnull(type, ''),
"');"
) AS INSERT_SQL
FROM
t_bpm_form_rights
WHERE
processdefineid =@SRCprocessdefineid
UNION
## 同步前后置任务
SELECT
CONCAT(
"insert into t_bpm_trigger VALUES('",
id,
"',",
"'" ,@processdefineid,
"',",
"'" ,@deploymentid,
"',",
"'",
ifnull(activityName, ''),
"',",
"'",
ifnull(beforehandler, ''),
"',",
"'",
ifnull(afterhandler, ''),
"');"
) AS INSERT_SQL
FROM
t_bpm_trigger
WHERE
processdefineid =@SRCprocessdefineid
AND deployId =@SRCdeployId
##将最后查询结果集在 目标数据库中执行即可

8.修改jpdl的语句

2.修改jpdl的语句
######修改jbpm4_lob，修改请假表定义######
update jbpm4_lob set blob_value_='****' where deployment_=8610174;

######修改t_bpm_process_define，修改请假表定义######
update t_bpm_process_define set jpdlXml='****' where id='2c913f9e4906ec2001490c3a680f39f7';

9.修改个别单子的经办人逻辑(目前已为管理员提供前台操作入口)

update jbpm4_task set ASSIGNEE_ = 'dong02.yang' where ASSIGNEE_='yonghao.he' and DBID_=9685898;
update t_bpm_process_execution set modifyUserCode='dong02.yang' where modifyUserCode='yonghao.he' and processInstanceId = '员工转正评定.8361018' ；
update t_bpm_process_task set createUserCode='dong02.yang' where createUserCode='yonghao.he' and finishTime is null and taskId=9010882 ;

10.

insert时出现主键冲突的处理方法