SQL数据库还原语句
---附加数据库
sp_attach_db '数据库名','数据库全路径','数据库日志全路径'
---查看数据库逻辑文件名
RESTORE FILELISTONLY from disk = '备份文件'
---还原数据库
restore database hzrb from disk = '备份文件'
with move '主逻辑名' to '存放mdf路径'
,move '日志逻辑名' to '存放ldf路径'
--修改数据库的逻辑文件名（数据）
ALTER DATABASE NEW
MODIFY FILE(NAME='Old_Data',NEWNAME='New_Data')
GO
--修改数据库的逻辑文件名（日志）
ALTER DATABASE NEW
MODIFY FILE(NAME='Old_Log',NEWNAME='New_Log')
GO
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oracle 方法 & ......
Oracle SQL(partI)
Data manipulation language(DML): select, insert, update, delete, merge.
Data definition language(DDL): create, alter, drop, rename, truncate, comment
Data control language(DCL): grant, revoke
Transaction control: commit, rollback, savepoint
Arithmetic Expressions:
+, -, *, / ......
Merge statement
function benefits: 1) provides the ability to conditionally update, insert or delete data into a database table. 2) performs an update if the row exists, and an insert if it is a new row. --> 1) avoids seperate updates, 2) increase performance and ease of use. 3) is useful in dat ......
1. My test: (create and grant the sysdba to a new user by SQL*Plus)
CREATE USER FJTEST1 IDENTIFIED BY JEANJEANFANG;
GRANT SYSDBA TO FJTEST;
REVOKE SYSDBA from FJTEST;
CONNECT FJTEST1/JEANJEANFANG AS SYSDBA;
2. Using ORAPWD in windows:
C:\» ORAPWD;
(show help information)
3. to see th ......
using System;
using System.Collections;
using System.Collections.Specialized;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace DAL
{
......
