Label:ALTER tablespace xh_dm DROP datafile ' F:\DEV\ORACLE-DATA\ORCL\XH_DM_1.DBF ';sql> ALTER tablespace XH_DM2 DROP datafile ' F:\DEV\ORACLE-DATA\ORCL\XH_DM_1.DBF ';ALTER tablespace XH_DM*ERROR at line 1:Ora-03262:the file is Non-empty1 --Oracle Storage Deletes an invalid data file, and the above invalid table2 --1. View the file ID3 Select file_id,file_name, Ta
Data | database
Java in the writing of some graphical small program, sometimes to store a small amount of data, if the use of JDBC to connect the database, it will slow down the program, and, in addition, we can use Java files to save data in lieu of the database, so that not only can realize the function of storage, A
Recover data: Restore deleted files in LinuxGuideHave you ever encountered such a thing? When you find out, you have deleted the key or usedThe "rm" command mistakenly deletes an object that should not be deleted.
In the first case, you can go to the garbage bin, search for the file, and restore it to the original location. But what should I do in the second case? You may know that the Linux Command Line do
System data files and information password files
Stored in/etc/passwd. Use the following function to obtain the password file.
# Include
# Include
Struct passwd * getpwnam (const char * name );
Struct passwd * getpwuid (uid_t uid );
If you want to view only the login name or user ID, the above two functions can meet
Android saves and reads data to files
Android gets fileoutputstream
Context. openfileoutput (file, permission)
Context is the context of the environment, and activity inherits the ccontext class.For exampleAA inherits ActivityYou can write it like this.: AA. This. openfileoutput (file, permission)
File: Name and extension of the file created for the user, such as water.txt
Permission: Android has
Android creates databases based on SQL files and inserts data
During client development, data written on the server is duplicated and you do not need to access the server. Then, the server provides an SQL file containing the database and data, it is impossible for these development clients to manually store
Happy New Year !! I used the yii2 form. Previously, my form did not contain the Upload file amp; lt; inputtype quot; file quot; amp; gt;, and the Chinese field is normal, however, after the file is uploaded, set #039; enctype #039; amp; gt; #039; multipartform-data #039 ;, then there is a problem with the upload. I...Happy New Year !!
I used the yii2 form. Previously, my form did not contain an uploaded file.The Chinese field is normal, but a
endspent (void );
3. group files
UNIX files contain the fields shown in. These fields are also included in the group structure defined in
POSIX defines the following two functions to find information about the user group based on the user name or user ID.
# Include
Struct Group * getgrgid (gid_t GID );
Struct Group * getgrnam (const char * Name );
Similar to accessing a password file. To access the ent
Oracle Storage in Action: Delete physical data files, oraclestorage
Alter tablespace XH_DM drop datafile 'f: \ DEV \ ORACLE-DATA \ ORCL \ XH_DM_1.DBF ';
SQL> ALTER TABLESPACE XH_DM2 drop datafile 'f: \ DEV \ ORACLE-DATA \ ORCL \ xh_dm_1.dbf ';Alter tablespace XH_DM*ERROR at line 1:ORA-03262: the file is non-empty
Saving Oracle learning database data as files
It is often necessary to generate documents from data in Oracle databases. Because you prefer the script method, you need to set the format when using spool, the following is a simple example of how to set the format in Oracle. There are a total of 18 items. In fact, there are only a few commonly used items. I will at
Atitit. Improved Backup File Replication speed (4) --- data mining to obtain the list of recycle bin files
1. Principle of putting data into the recycle bin and 1
2. info2 file structure 1
3. Obtain the file list. Two Methods: regular expression or parsing 1.
4. Path regular expression [A-Za-Z] \: [\ a-zA-Z0-9 \ xb0-\ xf7 \ xA1-\ xfe _. ~] + 2
5. Refer to 2
1. P
server 1, ASP files:
' EXAMPLE as: Put a 24-hour online number in the database into an Excel file
' AUTHOR: Steel Workers
' Email:hello_hhb@21cn.com
' Date:2001-3-25
' Test: Testing through in Nt4,sp6,sql SERVER 7.0,excel2000
%>
If Request ("act") = "" Then
Else
Dim conn
Set Conn=server. CreateObject ("Adodb.connection")
Conn. Open "Test", "sa", ""
' Conn. Open application ("ConnStr")
Dim Rs,sql,filename,fs,myfile,x,link
Set fs = server. CreateObj
A large amount of test data needs to be inserted into the sqlite database and the transaction is intended to be inserted cyclically. However, sqlite does not support the definition of the declare variable, so it cannot be achieved by defining the cyclic variable value.
You need to use a batch processing file to repeatedly call the insert sqlite statement. The method is as follows:Create a batch file named sqlite. bat that is called cyclically.Copy
A large amount of test data needs to be inserted into the sqlite database and the transaction is intended to be inserted cyclically. However, sqlite does not support the definition of the declare variable, so it cannot be achieved by defining the cyclic variable value.You need to use a batch processing file to repeatedly call the insert sqlite statement. The method is as follows:Create a batch file named sqlite. bat that is called cyclically.Copy code
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