how to decode

DECODE function: Compares the input value with the parameter list in the function and returns a corresponding value based on the input value. The parameter list of a function is a sequence of several numbers and their corresponding result values. Of

The strange DECODE function encountered the following problem today: www.2cto.com order by decode (column_id, 1, null, 2, null, 3, null, column_id, that is, when the number of columns is greater than 10, the column_id order is 10, 11, 12, 13, 6, 7, 8

Encoding of characters in Python. During encoding and conversion, we must be clear about the encoding method of the string we read, or the encoding method of the string we want to decode. Then we can use decode to decode the string, decodes a

Document directory Libjpeg Introduction Use of libjpeg Library Summary Multimedia Applications are becoming more and more important in today's electronic products, especially in embedded devices. This series of articles will introduce how to

Use the Instr () and decode () functions of Oracle for multi-condition combination of ORACLE functions The system encounters a situation where you want to process the multi-condition combination query, using the implementation methods of the instr

Oracle decode function Syntax: DECODE (value, if1, then1, if2, thne2, if3, then3,... else ). The first problem involved is the dynamic input parameters. Oracle decode function Syntax: DECODE (value, if1, then1, if2, thne2, if3, then3,... else ). The

Http://www.javatips.net/blog/2011/08/how-to-encode-and-decode-in-base64-using-javahttp://commons.apache.org/proper/commons-codec/Official Download linkEncode and Decode in Base64 using Java explains on different techniques for Encode Base64 using

Decode function: It can compare an input value to a parameter list in a function, and return a corresponding value based on the input value. The parameter list of a function is a number of sequential pairs of numbers and their corresponding result

Meaning explanation:Decode (condition, value 1, return value 1, value 2, return value 2,... ) Value N, return value N, default value)The function has the following meanings:IF condition = value 1 Thenreturn value 1ELSEIF condition = value 2

/* Decode Function */ -- The prototype of the decode function is decode (testvalue, if1, then1, if2, then2.... else ). -- Test testvalue. If testvalue is set to if1, then1 is returned. If testvalue is set to if2, then2,... is

When I read other users' SQL statements today, I still see the decode () function. I have never touched it before. I checked it online. It is quite a useful function, write it down and hope it will help you!     Decode () function

In the actual development, sometimes there will be let you do statistics, make statements. For example, in the Student elective management system allows you to write all the students of each of the results, at this time we write the results of the

Introduction to Decode () functions in SQL-freespider-Blog Park Look at other people's SQL today look at this inside there are also decode () function, has never been in contact with the Internet to check a bit, but also very useful for a function,

DECODE () function usage: Compares the input value with the parameter list in the function, and returns a corresponding value based on the input value. The parameter list of a function is a sequence of several numbers and their corresponding result

First, caseSimilar to If-else, the statement is as follows:Case expr when Expr1 then RETURN_EXPR1[When Expr2 then RETURN_EXPR2...When Exprn then RETURN_EXPRNELSE else_expr]ENDAnd there are two methods of judging, case field when value then return

Case when is convenient when different conditions require different return values. It can be used when assigning values to variables or in select query statements. (Exit immediately if one meets the requirement) -- Search format, NO content after

Decode () can only create new columns (horizontal scaling), while the max () function is used to reduce the number of rows of the same category (vertical compression ), in this way, the original thin database record set is converted into a

What is the difference between decode and case when?Decode can only be equivalent, case when can be used for range, range can be used for condition differentiation, decode can do, and case when can also do; in terms of efficiency, I personally think

BackgroundWhen processing a business data, it is necessary to determine the size of the two data fields and keep the large data below the specified fields. Consider using the Decode function and the sign function for this purpose.Solution1, decode

In the python source code file, if you are useful to non-ASCII characters, you need to make a declaration of character encoding at the head of the file, declared as follows: # code : UTF - 8 Because Python only checks for #, coding,