, and then the two should be different. The suggestion is not casually set, we set up here just do a simple phantom reading demo, MySQL subsequent version may discard this parameter.
Session 1 first adds a myid>95 record to the current readMysql> Show CREATE TABLE Test_gap_lock\g1. Row ***************************Table:test_gap_lockCreate table:create Table ' Test_gap_lock ' (' id ' int (one) not NULL,' Name ' varchar (+) DEFAULT NULL,' myID ' int (one) DEFAULT NULL,PRIMARY KEY (' id '),UNIQUE KE
database, then another transaction also accesses the data, and then used this data. Session 1:mysql> SELECT @ @global. tx_isolation; +-----------------------+
|
@ @global. tx_isolation | +-----------------------+
|
Repeatable-read |
+-----------------------+ 1 row in Set (0.00 sec) mysql> SELECT @ @session. tx_isolation; +-----------------------+
|
@ @session. tx_isolation | +-----------------------+
|
Repeatable-read |
+-----------------------+ 1 r
modification has not been committed to the database, then another transaction also accesses the data, and then used this data. Session 1:mysql> SELECT @ @global. tx_isolation; +-----------------------+
|
@ @global. tx_isolation | +-----------------------+
|
Repeatable-read |
+-----------------------+ 1 row in Set (0.00 sec) mysql> SELECT @ @session. tx_isolation; +-----------------------+
|
@ @session. tx_isolation | +-----------------------+
|
Repe
accessing the data, and the data is modified, and this modification has not been committed to the database, then another transaction also accesses the data, and then used this data. Session 1:mysql> SELECT @ @global. tx_isolation; +-----------------------+
|
@ @global. tx_isolation | +-----------------------+
|
Repeatable-read |
+-----------------------+ 1 row in Set (0.00 sec) mysql> SELECT @ @session. tx_isolation; +-----------------------+
|
@ @s
Mysql InnoDB Line Lock Implementation methodinnodb row locks are implemented by locking the index entries on the index, which is different from Oracle, which is achieved by locking the corresponding data rows in the data block. InnoDB This type of row lock implementation is characterized by the fact that InnoDB uses row-level locks only if the data is retrieved by index criteria, otherwise INNODB will use a table lock! In practice, pay special attention to this feature of the InnoDB row lock, o
write data! ");Return;}}
Mail TroughThe mail trough is designed based on the broadcast communication system and uses non-connection and unreliable data transmission.The mail trough is a one-way communication mechanism. The server process that creates the mail trough reads data, and the client process that opens the mail trough writes data. To ensure that the mail trough works normally on various Windows platforms, when we transmit a message, we should limit the message length to less than 424 b
execution: ctrl + p, ctrl + o
Command canceled: unmap ^ P
4. continuous line comment
: N1, n2/^/#/g // add # at the beginning of the row
Appendix: n1, n2/# // g // remove # from The Row #
: N1, n2/^ # // g // remove the first # Number of the row in a row
: % S/^/\/g // add a // symbol at the beginning of the line
: % S/\ ///g // remove the beginning of the line //
5. replacement command
: Abmymail280441589@qq.com
// After mymail is entered, it will b
1, first open the QQ mailbox in the POP3/SMTP service2. CodeMailMessage mymail = new MailMessage (); Create a message instance objectMymail.from = new MailAddress (""); sender, to the mail server verification information corresponding, can not be arbitrarily changedMYMAIL.TO.ADD (New MailAddress ("")); ReceiverMymail.subject = "C # send Email"; Message headermymail.subjectencoding = Encoding.UTF8; Title EncodingMymail.body = "This is a test email!"; M
(setcontenttitle (), text (setcontenttext ())
3.2 notification priority
The priority acts as a hint to the device UI about how the notification shocould be displayed.
Setpriority () Pass in one of the icationicationcompat priority constants.
There are five priority levels, ranging from priority_min (-2) to priority_max (2), if not set, defaults to priority_deafault (0)
3.3 creating a simple notification
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedI
formatpublic bool isbodyhtml {get; set;}AttachmentPublic string[] Attachmentspath {get; set;}public bool Send (){Initializes a mailaddress instance with the specified mail addressMailAddress maddr = new MailAddress (mailfrom);Initializing an MailMessage instanceMailMessage mymail = new MailMessage ();Add a mail address to a collection of recipient addressesif (Mailtoarray! = null){for (int i = 0; i {MYMAIL.TO.ADD (Mailtoarray[i]. ToString ());}}Add a
. Cancel: setnoic.
N turning back
N forward from the back
: % S/old/new/g Replace the specified string in full text, and old is the keyword to be replaced.
: N1, n2s/old/new/g Replace the specified string within a certain range
: % S/old/new/g Replace the specified string in full text and ask
7. Save and exit:
ZZ: wq shortcut
: Wnew_filename save as the specified file
: Wq! Save the modification and exit (the file owner or root can ignore the read-only attribute of the file)
Instance tips:
1. Im
changes and exit
: q!
Do not save changes to exit
: wq!
forcibly save the changes and exit (the file owner and root can be used, for the file only read-only permission !) )
2. Vim Usage Tips(1) execute command in last line mode : Format,! CommandFor example,:!ls-l/etc,:!date(2) import command execution result① Import Command Execution result: #r! order, eg. #r!ll/tmp② import file to Cursor location: #r file name, eg. #r/etc/issue(3) Defining s
protected]Comment Multiple lines: 4,8s/^/#/gCancel Comment: 4,8s/^#//g: 4,8s/^/\/\//g: AB mymail [email protected] Just enter MyMail to display the email addressCreate save Shortcut Vim commandVI/ROOT/.VIMRC Root UserVI/HOME/YUEJIDE/.VIMRC Ordinary UsersSet NuMap ^p i#Scheduling task commands at onceTo execute a program (command) at a point in time, be sure to use the full path of the commandAt 17:40>/bin/
= "font-family: XXFarEastFont-Font-size:9pt" >Sending e-mail to the following customersSet dbconnection = Server.CreateObject ("ADODB. Connection ")Dbconnection.open "Driver={microsoft Access Driver (*.mdb)};" _"Dbq=c:/inetpub/wwwroot/test/email.mdb"' Get the email address of the selected customerSet rscustomers = Server.CreateObject ("ADODB. RecordSet ")rsCustomers.Open "Select customername,customeremail from Emaillist where CustomerId in (" _Request ("CustomerId") ")", dbconnection,1,3,1While
How can I send a message with an attachment and HTML format via ASP? A routine is provided below.
Response.Buffer = True
Response.Expires = 0
' Create an object instance
Set mymail = Server.CreateObject ("CDONTS. NewMail ")
' The following is what will be sent
HTML = "html = html "html = html "html = html "html = html "html = html "html = HTML "This are a test mail in htmlhtml = html "Mail content here ...html = html "html = html "' Sender
My
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