个人常用语句

来源：互联网发布：手机淘宝秒杀神器编辑：程序博客网时间：2024/06/10 00:47

数据链路的创建，ORA-02019: 未找到远程数据库的连接说明

CREATE PUBLIC DATABASE LINK emrjktozjhis1122
CONNECT TO zjhis IDENTIFIED BY zjhis
USING '(DESCRIPTION =(ADDRESS_LIST =(ADDRESS =(PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)))(CONNECT_DATA =(SERVICE_NAME = emr_local)))';
运用：select t.*,t.rowid from GY_BQDM@emrjktozjhis1122 t

彻底删除表

drop table BL_BINGRENJBXX_V4;--删除表
purge recyclebin;--清除回收站

数据库用户有效期设置-永久-默认为180D

新添：command window 执行

ALTER PROFILE DEFAULT LIMIT PASSWORD_LIFE_TIME UNLIMITED ;--修改

SELECT * FROM dba_profiles WHERE profile='DEFAULT' AND resource_name='PASSWORD_LIFE_TIME';--查询确认

oracle用户操作

create user emr identified by emr ;

drop user emr [cascade] (后边的单词在删除非空用户时加上)

grant connect,resource to user ; (将当前用户的全部表授权给user)

grant dba to emr (需在管理员权限下运行，赋予emr管理员权限)

grant unlimited tablespace to zhangsan; （授予zhangsan用户使用表空间的权限）

查询全部用户名

select username from dba_users （用数据库管理员身份查询）

声称全局唯一标识符

string jlguid =Guid.NewGuid().ToString();

与数据库交互，遍历符合条件的数据

DBVisitor.ExecuteNonQuery(string.Format("update gy_bingrenxx set jiatingdh='" + lianXiDh +"'");

DataTable dt=null;

string sql =null;

try

{

sql =" select * from gy_Shangchuanxm where ";

dt = DBAccess.GetDataTable(DBAccess.EMR3, sql);

}

catch (Exception ex)

{

AppGlobalObj.Log.Error(ex.Message);

}

foreach (DataRow rowin dtmx.Rows)

{

xiangMuBm =Convert.ToString(row["XIANGMUBM"]);

xiangMuMc =Convert.ToString(row["XIANGMUMC"]);

以特殊字符为标记，截字符串，并存入数组中

string[] wcfCanShu = wcfCanShu1.Split('|');

保存date数据类型的sql语句

string updaterz1 ="update GY_SHANGCHUANJL set shangchuanjg='上传成功',CAOZUOJSSJ=to_date('" +DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") +"','yyyy-MM-dd HH24:mi:ss') where SCJLID='" + SCJLID +"'";

插入数据

INSERT INTO table1(id, name, address) VALUES(1, ygl, 'beijing');

INSERT INTO table2 SELECT id, name, address FROM table1;

多字段排序，并且按照某个字段倒序

select * from table order by shijian desc,xuhao,biaoji asc,yangshi

用log4net.dll写日志

using log4net;

static ILog log = log4net.LogManager.GetLogger("XmlLog");

log.InfoFormat("[{2}][{0}].OUT {1}", "111", "111", "111");

log.InfoFormat("[{2}][{0}].OUT {1}", TradeType, TradeMsgOut, guid);

log.InfoFormat("{0}", msg + "\r\n");

程序暂停一段时间（义乌中心医保APP)

System.Threading.Thread.Sleep(60000);

0 0