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Implement paging Analysis of Large result sets in ASP. NET

: Declare @ sort/* the type of the sorting column */ Set rowcount @ startrow Select @ sort = sortcolumn from Table order by sortcolumn Set rowcount @ pagesize Select from table where sortcolumn >=@ sort order by sortcolumn Subquery There are two other methods that I have considered. Their sources are different. The first is the well-known triple query or self-query method. In this article, I also use a similar general logic that contains all other stored procedures. The principle here is t

Asp. Research on implementing large result set paging in net

RowCount @PageSize SELECT from Table WHERE sortcolumn >= @Sort ORDER by SortColumn    Child Query There are two other methods that I have considered, and their sources are different. The first is a well-known triangulation query (Triple query) or a query method, and in this article I use a similar generic logic that contains all other stored procedures. The principle here is to connect to the whole process, and I did some reduction in the origina

Python certificate-based encryption and decryption implementation

()Cert = X509.X509 ()Cert. set_serial_number (1) # certificate sequence numberCert. set_version (1) # certificate versionCert. set_issuer (issuer_name () # issuer informationCert. set_subject (issuer_name () # topic informationCert. set_pubkey (puk)Make_certificate_valid_time (cert, 365) # certificate expiration timeCert. sign (pk, 'sha256 ')Return cert, pk, puk# Start creationCert,

Python implements certificate-based encryption and decryption, and python encrypts and decrypts data.

. set_issuer (issuer_name () # issuer InformationCert. set_subject (issuer_name () # topic informationCert. set_pubkey (puk)Make_certificate_valid_time (cert, 365) # certificate expiration timeCert. sign (pk, 'sha256 ')Return cert, pk, puk# Start CreationCert, pk, puk = make_certificate (1024)Cert. save_pem ('jb51. net

Phoenix implementation querying hbase with SQL

Tags: des style blog http io ar os using SPArticle source: Daniel notesHBase, a NoSQL database, can store large amounts of non-relational data.HBase, which can be manipulated with the hbase shell, or by using the HBase Java API. HBase is a database, but its query statements are not very useful. It would be perfect to use SQL statements to manipulate hbase like a relational database such as MySQL.Existing tools have many Hive,tez,impala,shark/spark,phoenix and so on. Today the main record is Pho

Python has a certificate encryption and decryption implementation method

) When using certificates Copy CodeThe code is as follows: Readrsa = Rsa.load_key (' Jb51.net-private.pem ', passphrase) Second, the X509 standard way to generate certificates 1. Generate certificate, public key file, private key fileCopy the Code code as follows:Import time From M2crypto import X509, EVP, RSA, ASN1 Def issuer_name (): """ The name of the certificate issuer (the distinguished name). Parameters: None Return: The issuer of the X509

Mysql operation library 1.2

After a small change, the latest version is released :? Php ** + ---------------------------------- * MySQL operation class library + ------------------------------------ * @ author Ma Yun + ---------------------------------- * @ version1.2 (2013-5-31) + ----------------------- After a small change, the latest version is released :? Php/** + ---------------------------------- * MySQL operation class library + ------------------------------------ * @ author Ma Yun + Yun * @ version 1.2 () + -----

Oracle Database Administrator duties are carried by juxianzhuang)

settings and use 'nextext. SQL '. B) Check the existing extents and use 'existext. SQL '. 2. All Tables should have unique primary keys. A) Check the tables that do not have a primary key and can use 'no _ PK. SQL '. B) find those primary keys that do not play a role and use 'dis _ PK. SQL '. C) All primary keys used for indexing are unique and can be 'nonupk. SQL to check. 3. All indexes should be placed

DBA's responsibilities and tasks are from the Oracle Chinese Technical Forum)

space management Plan. Perform a comprehensive check on the Oracle database status. Daily Work (1) confirm that all instances are in normal status Log on to all databases or routines to check Oracle background processes: $ PS-Ef | grep ora (2) Check the use of the file system (available space ). If the remaining space of the file system is less than 20%, delete unnecessary files to release space. $ DF-K (3) Check the log file and trace file to record errors in the alert and trace files.

Python has a certificate encryption and decryption implementation method _python

Cert.set_issuer (Issuer_name ()) # Issuer Information Cert.set_subject (Issuer_name ()) # Topic information Cert.set_pubkey (PUK) Make_certificate_valid_time (cert, 365) # Expiration time of certificate Cert.sign (PK, ' sha256 ') Return cert, PK, PUK # Start creating Cert, PK, puk= make_certificate (1024) Cert.save_pem (' Jb51.

. NET program Optimization

manipulate the page by performing the following functions:Eliminates flicker caused by navigation.Keep scrolling position when moving from one page to another.Maintains the element focus between navigation.Only the state of the last page is preserved in the browser's history.Smart navigation is best for an ASP. NET page that requires frequent postbacks, but whose content does not change significantly when it returns. Consider this carefully when deci

God-level programmers bring: the implementation method of encryption and decryption with the Python certificate!

code is as follows:Geekso.save_key (' Jb51.net-private.pem ', callback=passphrase)When using certificatesThe code is as follows:Readrsa = Rsa.load_key (' Jb51.net-private.pem ', passphrase)II. certificate generated by X509 standard 1. Generate certificate, public key file, private key fileThe code is as follows:Import timeFrom M2crypto import X509, EVP, RSA, ASN1Def issuer_name ():"""The name of the certif

Oracle dba's Responsibilities

. check whether any security policy violations occur.C. view the SQL * NET log of the error locationD. archive all warning logsE. Visit the supplier's home page frequently.4. Monthly Maintenance ProgramA. view the growth rate that harms the databaseB. Review previous database optimization performance adjustmentsC. view the I/O screen neck issuesD. Review FRAGMENTATIONE. Future execution planF. View adjustment points and Maintenance5. AppendixA. Monthl

SQL CREATE TABLE Script

"1" SQL Server setting primary key self-growing column SQL Server setting primary key self-growing column 1. Create a new data table with field ID, set ID as primary key www.2cto.com CREATE TABLE TB (ID int,constraint pkid PR Imary key (ID)) CREATE TABLE TB (ID int primary key) 2. Create a new data table with field ID, set ID as primary key and auto-number CREATE TABLE TB (ID int identity (), cons Traint Pkid primary key (ID)) CREATE TABLE TB (ID int identity (first) primary key) 3. A data table

Database design skills 14-network Extraction

way, the original multi-to-many relationship is now two one-to-many relationships. The attributes of the original two entities should be reasonably allocated to the three entities. The third entity here is essentially a complex relationship, which corresponds to a basic table. Generally, database design tools cannot identify many-to-many relationships, but can process many-to-many relationships. [Example 3]: In the "library information system", "books" are an entity, and "readers" are also an e

[Reprinted] C # Open-Source Projects (many overseas projects)

reverse engineering to write custom plug-ins. Mjbworld is an open-source 3D editor that allows you to select and drag images on the GUI. It is based on and applies the X3D and fig standards. The software is designed to create a 3D world using open free programs. It can also be used for data exchange between other free open software programs. Mjbworld has Java, C # And C ++/Qt versions. Monocalendar is an open-source calendar program on the. NET p

C # Open-Source Projects

for data exchange between other free open software programs. Mjbworld has Java, C # And C ++/Qt versions. Monocalendar is an open-source calendar program on the. NET platform. It aims to provide a calendar program similar to ical for other platforms outside the Mac platform. Data tier generator is an open-source project on the Microsoft. NET platform. It generates SQL Server 2000 scripts and C # classes fo

The ultimate disguise of ASP's backdoor

function is a string, we encounter quotation marks to double write. Well, since execute is a string, then we can take the inside of the Dongdong to encrypt. How do you encrypt it? Well, just use the simplest shift method. Please look at the code: But=1 Cc=replace (Nr,vbcrlf, "Hu") For i= 1 to Len (cc) If Mid (cc,i,1) PK=ASC (Mid (cc,i,1)) +but If pk>126 Then pk

Responsibilities of Oracle Database administrators

unused files to free up space. $DF –k (3). Check the log files and trace files for errors in the alert and trace files. Connect to each system that needs to be managed ? Using ' Telnet ' ? For each database, CD to Bdump directory, usually $oracle_base/? Use the Unix ' tail ' command to view Alert_? If any new ora-errors are found, record and resolve (4). Check the validity of the database day backup. How to Back up Rman: Check the backup log of the T

Responsibilities of Oracle Database Administrator (EXT)

. Connect to each system you want to manage: Using ' Telnet ' For each database, CD to Bdump directory, usually $oracle_base/bdump Use the Unix ' tail ' command to view the Alert_.log file, and if any new ora-errors are found, record and resolve. (4). Check the validity of the database day backup. How to Back up Rman: Check the backup log of the Third-party Backup tool to determine if the backup was successful. For export backup mode: Check t

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