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Function:One, you can remove the list, duplicate items in the tupleSecond, can be used for intersection, collection, difference set, etc.def add (self, *args, **kwargs):　　　　　　"" Add " " " S1 = (1,2,3 , 4,2,3,1) S3 = set ( s1) S4 = S3.add (5)

Operation Result setIn order to fit the test, two tables have been built, and some test data have been added, which are repeatedly recorded as soochow characters.Table: Person_1 wei People　　　Table: Person_2 Shu Characters　　　　A, Union forms and

The following answers are reprinted: I often see some questions about ORACLE character sets. I 'd like to introduce them in an iterative way. First iteration: master the basic concepts of character sets.Some may think that this is an option, but in

Analysis of Character Set problems in Oracle databases I often see some questions about Oracle character sets. I 'd like to introduce them in an iterative way. First iteration: master the basic concepts of character sets.Some may think that this is

In order to fit the test, two tables have been built, and some test data have been added, which are repeatedly recorded as soochow characters.Table: Person_1 wei People　　　Table: Person_2 Shu Characters　　　　A, Union forms and setsUnion can connect two

The concept of a character set everyone knows, proofing rules many people do not understand, the general database development is also not used in this concept, MySQL in this convenient seemingly very advanced, about aboutBrief descriptionCharacter

Summary of Oracle character set issuesCategory: Oracle2006-06-04 13:48 1298 people read comments (3) favorite reports Oracle Database Sqlcharacter Storage Insert Vstonet Source: Chrysanthemum Forum often see some friends ask questions about

MySQL character set ultimate solution [posting]   MySQL, an open-source database, has always been the first choice for small and medium-sized enterprises to build Web applications. In particular, It is a golden partner to cooperate with PHP and

I often see some friends ask questions about Oracle character sets, and I'd like to introduce them in an iterative way. 　　 First iteration: Mastering the basic concepts of character sets.Some friends may think this is superfluous, but in fact it is

Transferred from: http://blog.csdn.net/business122/article/details/7541486Python's set, like other languages, is a set of unordered, non-repeating elements, with basic functionality including relationship testing and de-duplication elements. The

Encountered a SQL statement that created the databaseCREATE DATABASE testdb DEFAULT CHARACTER SET UTF8 COLLATE utf8_general_ci;Note : This specifies that the character set is used UTF8instead of utf-8.Interested in character SET and collate in the

One, Character set (Character set)　　is a collection of more than one character (English characters, kanji characters, or other national languages ), with a variety of character sets, and each character set contains a different number of

Recently, in the project group used by the MySQL database, the insertion of data garbled, on this issue to make a summary, we start from the most basic point, to the root causes of errors and solutions.Basic concepts character (Character) refers to

The set set is similar to a jar, thrown into "set", and there is no apparent order between objects in the collection.The set set is essentially the same as the collection collection, and he does not provide any additional methods.in fact set is

Brief Description Character set and proofing rules A character set is a set of symbols and encodings. A proofing rule is a set of rules used to compare characters within a character set. MySQL in collation to provide strong support, oracel in this

Beckham _ redis set/zset type learning, _ rediszset Redis set and zset types I. collection type 2. view set and zset set commands Iii. set and zset set instances     I. collection type 1. There are two types of redis collections: ordered and

Set learning notes, set learning notes I. Concepts A set is a way to store objects. The collection contains addresses for convenient reference. JDK 1.2 is available. Ii. Differences between a set and an array Set is variable length, and array is

Recently, in the MySQL database used by the project team, garbled characters are inserted into the data. We have summarized this issue, starting from the most basic point, to the deep-seated problem Recently, in the MySQL database used by the

Recently, in the project group used by the MySQL database, the insertion of data garbled, on this issue to make a summary, we start from the most basic point, to the root causes of errors and solutions.Basic concepts? A character (Character) is the

Character Set Character Set Author: zyqin Created: 2005-03-25 English: http://www.dbonline.cn If The database has been created with the wrong character set, use the following to change the character set UPDATE SYS. props$ SET