The first step, in the computer we open "Ali Wangwang and then find to delete the chat record related personnel, and then click on the left of the" message record ", in the pop-up window, select the lower right corner of the" more. "
The second step, now you will see the letter of the chat record, we click on the menu above "Select All", and then clic
Some time ago according to business requirements to record the relevant information of each operation: this way through the SPRINGMVC in the controller set a custom annotation class to receive the data, through the SPRINGAOP section to the received data for logical processing.
Based on an entity class (such as: Uploadcount) that is created in advance based on business requirements:
1. First Springmvc.xml to configure
2. Create custom annotation class
Delete duplicate records and save the first record or the last record
Delete duplicate records and save the first record or the last record
Delete table: record of duplicate mails in dgpage and keep the last record.
Delete dgpa
If there is a t_user data table in this way, the table ID increases automatically, but the IDs in the data table are not guaranteed to be continuous. Write an SQL statement, query the data between the n-th record and the M-th record (M> N> 0, all smaller than the total number of records in the data table)
The idea is as follows:
First, find the ID of the nth reco
// If no data exists, insert new data$ SQL = "insert into {$ ECs-> table ('cat _ Lang ')} (cat_id, lang_id, cat_name, keywords, cat_desc)Values ({$ cat_id}, {$ k}, '{$ Val ['cat _ name']}', '{$ Val ['keyword']}', '{$ Val ['cat _ desc']}')On duplicate key update cat_name = '{$ Val ['cat _ name']}', cat_desc = '{$ Val ['cat _ desc']}', KEYWORDS = '{$ Val ['cat _ desc']}' ";Note that the table primary key must be unique. Here, I use the double primary key mechanism of classification ID and language
Three kinds of return to MySQL tutorial insert a record to return the record ID method
Method One
ID Int (one) not null PRI key auto_increment,name varchar (a), backup varchar (50)Now, when you want to insert a record, return his ID value (insert only the value of the name and backup field). How should I write this statement? Thank you!
You are more worried th
QQ software users to the detailed interpretation of the sharing of QQ chat records in the location of the folder.
Location sharing:
Method One: Chat record folder is to save on the computer hard disk, as long as you know the chat record in which folder in the computer, "QQ chat record in which folder how to open" the problem is naturally solved. Imm
Oracle dynamically adds a record, and oracle dynamically adds a record
/// /// Add an object/// /// /// /// Public static int AddEntity {T t = new T ();Var propertys = typeof (T). GetProperties ();String FieldKey = string. Empty;String FieldValue = string. Empty;Foreach (var p in propertys){Foreach (var key in dic. Keys){If (p. Name. ToUpper () = key. ToUpper ()){FieldKey + = p. Name. ToUpper () + ",";If (p
Record logs (log processing), record log processing
1. Call methods:
By classifying logs, you can quickly locate errors and quickly solve problems in the project, which greatly improves efficiency and facilitates the overall work.
TimeSpan comprehension:
Private string DateDiff (DateTime DateTime1, DateTime DateTime2){String dateDiff = null;TimeSpan ts = DateTime1.Subtract (DateTime2 ). duration (); date
The custom log record function allows you to easily record logs by day.
1. Define the Log Type
Public enum LogType{Debug = 0,Error = 1,Info = 2,Warn = 3}
2. Add static LogHelper class
Public static class LogHelper{Public static void Write (string msg, LogType logtype = LogType. Debug){Try{String basePath = Path. Combine (AppDomain. CurrentDomain. BaseDirectory, "Logs ");Directory. CreateDirectory (basePath
IOS9 request https problems-record, ios9 request https record
When iOS9 started, Apple changed all HTTP to HTTPS, so the network request failed. solution:
1. Change to HTTP:
Add a Key: NSAppTransportSecurity (Dictionary type) to the info. plist file, and then add a Key: NSAllowsArbitraryLoads (Boolean Type) to it. The attribute value is set to YES. For example: 2. Add a whitelist
(This is mainly for ru
Record as you want (two problems in code optimization) and record optimization as you want
[Disclaimer: All Rights Reserved. You are welcome to reprint it. Do not use it for commercial purposes. Contact Email: feixiaoxing @ 163.com]
Two problems have been found recently during code optimization. One is the problem of global variables, and the other is the issue of compiling out of order. Because we didn't
Record my GDB configuration and record the GDB ConfigurationI. To better display the STL container in GDB, We need to download a python script first.PS: Make sure that the GDB you installed can execute the python script.
cd ~mkdir .gdbcd .gdbsvn co svn://gcc.gnu.org/svn/gcc/trunk/libstdc++-v3/python
2. Modify the. gdbinit file in the user directory (copy the following text)
# The python script pythonimport
Django entry record 2: django entry record
1. Create an app, python manage. py startapp appname
2. design the model and edit the model in the appname/directory.
3. Check the modification of the model. python manage. py makemigrations appname
4. automatically perform database migration and synchronize the database structure. python manage. py sqlmigrate 0001
5. Create a new data table named python manag
Jmeter simply uses a proxy to record app requests, and jmeter to record app requests
1. Download Jmeter (related blog)
2. Add a proxy
3. perform the following settings after creation
Port 8888: the port number used to set proxy for the mobile phone for a while is the same as the port number here.
3. Set proxy on the mobile phone
Ip: Where is the Jmeter computer?
Port: Above 8888
Iv. Recorde
;
Cylinder number--2nd byte high 2 bit + 3rd byte 8 bit.
4th byte
The partition type character. 00h--indicates that the partition is unused (that is, not specified);
06h--fat16 basic partition;
0bh--fat32 basic partition;
05h--extended partition;
07H--NTFS partition;
0fh--(LBA mode) extended partition (83H for Linux partitions, etc.).
Section 5,6,7 bytes
The end of this secti
A small record of qt Learning (2), qt Learning Record
Well... This time I received a ticket
A graphical interface is required. You can just consolidate and learn QT. I took it without hesitation.
The following issues are recorded:1. QWidget and QDialog
The slot functions in QDialog include accept () and reject (), which can be directly used.
In addition, the QDialog window is displayed in exec () mode, whic
Lintcode record ·, lintcode record
Singleton mode: The Singleton mode is implemented in C #. The difference in python is that the static methods in the class are written differently. python is called a class method. @ classmethod is added before the function.
class Solution: # @return: The same instance of this class every time __m_Solution=None @classmethod def getInstance(self): # w
Python Learning Record (basic-1), python record basics-1Python Basics
1. Preface
Recently, I have been studying Python to summarize the learned knowledge and thoughts or ideas, so as to make the logical structure of my knowledge clearer and more thorough. Given the limited level of learning, some ideas and ideas will be implemented and solved in the future.
I use Python3.5, so the Python standard library r
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