Label:Decode () corresponds to case-when function Case CHARINDEX ('/', start_point_name) When 0 then Start_point_name else substring (start_point_name,1,charindex ('/', start_point_name)-1) End Note: The syntax is different when SQL Server uses case to determine whether it is null Null should be judged by: Case when identifier was NULL then Airway_point_name else identifier end, The simplest way is to use t
handling of column fields SQL Case Do the column processing Sql> Select deptno,sum (SAL) from the EMP Group by DEPTNO; Select Case When deptno=10 Then ' ACCOUNTING ' When deptno=20 Then ' Reserch ' When deptno=30 Then ' SALES ' End sum (SAL) from EMP GROUP BY Deptno
handling of column fields SQL Decode
I was told today that a page is garbled. As a result, the Chinese characters are passed in through URL parameters. server. urlencode () encoding is used before the input. It seems that there is no problem.
A little strange. When a breakpoint is set, I wrote the following statement for testing during monitoring:
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->Server
In C #, server. urlencode and server. urldecode are used to encode and decode URLs.
Today, the user control is used in the project, but the browser considers that the page has a JS error, so the button search event cannot be triggered.
So I thought about using Js.
Because the search content may be Chinese and Chinese characters in the URL may be garbled, you m
The Decode function is a unique method of computing provided by Oracle's SQL software Oracle Pl/sql, known for its concise operations, controllable data models, and flexible format conversions.
Look at other people's SQL today to see that there are decode () function, has n
Tags: default special case ICA To_char else understanding spider. com clearLook 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, write down hope to help friends Ah! Introduction to the Decode () function: Main role: Translation of q
Tags: style blog http os io using AR div spIntroduction to the Decode () function in SQLLook 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, write down hope to help friends Ah!Introduction to the
Oracle SQL statements do not support the boolean Type (decode case)
Version:SQL> select * from v $ version;
BANNER--------------------------------------------------------------------------------Oracle Database 11g Enterprise Edition Release 11.1.0.7.0-64bit ProductionPL/SQL Release 11.1.0.7.0-ProductionCORE 11.1.0.7.0 ProductionTNS for Linux: Version 11.1.0.7.0-
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, write down hope to help friends Ah!????????Introduction to the Decode () function:Main role: Translation of query results into other values (that is, in other forms of expression,
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 introduction:
Main function: translate the query result into other values (that is, it is expressed in other forms. The follo
Text transfer from Freespider to WeiboLook 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, write down hope to help friends Ah!Introduction to the Decode () function:Main role: Translation of query results into other values (that is,
,=3000 when sale value =1000 translation to a , if other values are translated as other;SQL is as follows:Select Monthid, decode (sale,1000, ' D ', +, ' C ', +, ' B ', 4000, ' A ', ' other ') sale from outputSpecial cases:If you are comparing with only one valueSelect Monthid, decode (sale, NULL, '---', sale) sale from outputThatif (sale==null)Return "---"ElseSal
,=2000 when translated to c,=3000 when sale value =1000 translation to a , if other values are translated as other; SQL is as follows: Select Monthid, decode (sale,1000, ' D ', +, ' C ', +, ' B ', 4000, ' A ', ' other ') sale from output Special cases: If you are comparing with only one value Select Monthid, decode (sale, NULL, '---', sale) sale from output Anoth
Cited:To illustrate this, a score table is created, as shown in:Comparison:1, in SQL, these two functions we can only use case, the code and the results are as follows:Select Name,Case SubjectWhen ' Chinese ' then 1When ' math ' then 2When ' English ' then 3--else 3End as ' account code 'From ResultsSimilarly, we can use case to implement row to column, the code and results are as follows:Select Name,SUM (case when subject= ' language ' then Result en
Tags: return com out table based on tab from if statement berSyntax for the decode () function: 1 Select decode (ColumnName, value 1, translation value 1, value 2, translation value 2,... Value n, translation value n, default value)
2
3 from talbename
4
5 Where ... Where: ColumnName is the column defined in the table to be selected; The default value can be the column name you want to choose, or the othe
Case 1: query Table A data, if a column (Param_value) value is too long, the foreground is not good display, only take the first 20 characters, mouse hover and then use the layer to display all values;SQL notation: SELECTM. Param_value as Param_value,decode (sign (Length (m.param_value) -20), 1,concat (SUBSTR (m.param_value,0,20), ' ... '), M. Param_value) as Param_value_msgfrom TableA mIntroduction to the
Tags: select font car redshift span BSP code sort willSELECT * from A ORDER by DECODE (Aa, NULL,Ab) ; Aa Ab -------- ---------- 1 19 null 2 3 1 4 10 with decode When a function's statement is sorted, it is found that the AA field in a row is null when it is given a Span style= "Font-size:medium" > the AA field, therefore Span style= "font-si
Equivalent if statementWhen the decode function compares 1 parametersSELECT Id,decode (inparam, ' becomparedparam ', ' value 1 ', ' Value 2 ') name from bank#如果第一个参数inParam = = ' Becomparedparam ', the name given by select is displayed as a value of 1,#如果第一个参数inParam! = ' Becomparedparam ', then select gets the name displayed as a value of 2When the decode functi
)) whenT.price like 'Price:%' ThenSUBSTR (T.price, -, LENGTH (T.price)- *)ELSE '\ n' ENDPrice , Case whenT.sellername like 'linkman%" " Thensubstr (T.sellername,Ten, Length (T.sellername)-Ten) whenT.sellername like 'linkman%>' Thensubstr (T.sellername,Ten, Length (T.sellername)-185)Else '\ n' EndSellername fromTABLENAME TThe resulting data is more normative:Thus, we can summarize the following case-when syntax: Case when Condition1 Then Sentence1 when Condition2 Then Sentence2 ... ELSE S
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