SqlServer/Oracle 通过一个sql判断新增/修改
2024-08-27 19:03:39
if (Config.DbInfo.DbType.Equals(DBType.SQLServer))
{
sql = " IF EXISTS (SELECT 1 FROM wifi.imsi_model_status WHERE device_id = @device_id and wireless='" + row[].GetString() + "') UPDATE wifi.imsi_model_status SET model_status = @model_status,version=@version,serialnumber=@serialnumber, Log_Time=" + SysConst.time_sqlserver + " WHERE device_id = @device_id and wireless='" + row[].GetString() + "' ELSE INSERT INTO wifi.imsi_model_status(Log_Time, device_id, wireless,model_status,version,serialnumber) VALUES(" + SysConst.time_sqlserver + ", @device_id,'" + row[].GetString() + "', @model_status,@version,@serialnumber)";
cmdParms = new IDataParameter[];
cmdParms[] = new SqlParameter("@device_id", deviceId);
cmdParms[] = new SqlParameter("@model_status", row[].GetString());
cmdParms[] = new SqlParameter("@version", ver);
cmdParms[] = new SqlParameter("@serialnumber", ser);
sqlDic.Add(sql, cmdParms);
}
else if (Config.DbInfo.DbType.Equals(DBType.Oracle))
{
sql = "MERGE INTO wifi.imsi_model_status a USING (select count(*) co from wifi.imsi_model_status WHERE device_id = :device_id and wireless='" + row[].GetString() + "') b ON (b.co<>0) WHEN MATCHED THEN UPDATE SET Log_Time=" + SysConst.time_sql + ",model_status = :model_status,version=:version,serialnumber=:serialnumber WHERE device_id = :device_id and wireless='" + row[].GetString() + "' WHEN NOT MATCHED THEN INSERT (Log_Time, device_id,wireless, model_status,version,serialnumber) VALUES(" + SysConst.time_sql + ", :device_id, '" + row[].GetString() + "',:model_status,:version,:serialnumber)";
cmdParms = new IDataParameter[];
cmdParms[] = new OracleParameter(":device_id", deviceId);
cmdParms[] = new OracleParameter(":model_status", row[].GetString());
cmdParms[] = new OracleParameter(":version", ver);
cmdParms[] = new OracleParameter(":serialnumber", ser);
sqlDic.Add(sql, cmdParms);
}
代码很简单:
1.sqlserver就是使用的exists关键字判断
2.oracle这边就是使用的merge关键字判断
sqlserver核心代码:
if exists (select 1 from Teacher where id='')
update Teacher set name='lisi',addr='重庆' where Id=''
else
insert into Teacher(id,name,addr) values(1,'lisi','重庆')
Oracle核心代码:
MERGE INTO Teacher USING (select count(1) co from Teacher WHERE id='') on(co<>0)
WHEN MATCHED THEN
update set name='lisi',addr='重庆' where Id=''
WHEN NOT MATCHED THEN
insert (id,name,addr) values(1,'lisi','重庆')
最新文章
- JBPM工作流
- Ubuntu16.04/centos7 下为chrome/firefox安装flash player插件
- POJ 3974 回文串-Manacher
- sql语句左右表连接理解
- 使用git提交本地代码到github
- Mysql-字段类型
- vim代码补全-spf13,YouCompleteMe
- 条件随机场CRF简介
- SPOJ--K-query (线段树离线) 离线操作解决一些问题
- Oracle字符串分割函数
- AngularJS中ng-options简单用法及预选项失败的原因
- cpu affinity (亲和性)
- 什么是UUID?
- C++雾中风景6:拷贝构造函数与赋值函数
- 解决Git Revert操作后再次Merge代码被冲掉的问题
- apache、nginx、tomcat配置方法
- pyqt 不规则形状窗口显示
- CS229 6.11 Neurons Networks implements of self-taught learning
- Python爬虫:如何爬取分页数据?
- Linux系统安装telnet以及xinetd服务