?
Solved

sql server query

Posted on 2016-09-10
9
Medium Priority
?
115 Views
Last Modified: 2016-09-11
I am not sure how to make a query to take a field called word from tblwords and to add up the combined ascii code numbers.

so if the string in field word is:
'My word'
then the field AsciiEncode is populated with 674

i did find this on the ms website but not sure how to amalgamate that process into a query.

SET TEXTSIZE 0;  
SET NOCOUNT ON;  
-- Create the variables for the current character string position   
-- and for the character string.  
DECLARE @position int, @string char(15);  
-- Initialize the variables.  
SET @position = 1;  
SET @string = 'Du monde entier';  
WHILE @position <= DATALENGTH(@string)  
   BEGIN  
   SELECT ASCII(SUBSTRING(@string, @position, 1)),  
      CHAR(ASCII(SUBSTRING(@string, @position, 1)))  
    SET @position = @position + 1  
   END;  
SET NOCOUNT OFF;  
GO  

Open in new window

I am just experimenting with an idea, i may at some stage need to store those codes in a field 77-121-32-119-111-114-100 but i am not sure yet.
0
Comment
Question by:PeterBaileyUk
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 3
9 Comments
 
LVL 14

Accepted Solution

by:
Nakul Vachhrajani earned 2000 total points
ID: 41792646
You can encapsulate this logic into a scalar UDF and use that in the query as shown below:

--Safety Check
IF OBJECT_ID('dbo.func_ASCIIEncodeString','FN') IS NOT NULL
BEGIN
    DROP FUNCTION dbo.func_ASCIIEncodeString
END
GO

--Create the function
CREATE FUNCTION dbo.func_ASCIIEncodeString (@inputString VARCHAR(15))
    RETURNS INT
AS
BEGIN
    -- Create the variables for the current character string position
    DECLARE @position INT = 1;  
    DECLARE @ASCIIEncodedValue INT = 0;

    -- Initialize the variables.  
    SET @position = 1;
    WHILE @position <= DATALENGTH(@inputString)  
       BEGIN  
          --Debug Point
          --SELECT ASCII(SUBSTRING(@inputString, @position, 1)) AS ASCIIValue,  
             --    CHAR(ASCII(SUBSTRING(@inputString, @position, 1))) AS CharacterValue

          --Add the ASCII value of the currently read character into the return variable
          SELECT @ASCIIEncodedValue += ASCII(SUBSTRING(@inputString, @position, 1));
          SET @position = @position + 1;
       END

    --Finally return to caller
    RETURN @ASCIIEncodedValue;
END
GO 

/********************** Testing ********************/
--Test data structure
DECLARE @sampleInput TABLE (stringToEncode VARCHAR(15));

INSERT INTO @sampleInput (stringToEncode)
VALUES ('A'),
       ('B'),
       ('AB'),
       ('ASCII'),
       ('SQL'),
       ('Nakul');

--Check ASCII conversion
SELECT si.stringToEncode AS StringToEncode,
       dbo.func_ASCIIEncodeString(si.stringToEncode) AS EncodedValue
FROM @sampleInput AS si;

/* RESULTS

StringToEncode  EncodedValue
--------------- ------------
A               65
B               66
AB              131
ASCII           361
SQL             240
Nakul           507

*/

Open in new window


IMPORTANT: One of the things I have changed in the script is to the datatype of the input string from CHAR to VARCHAR. Since CHAR is a fixed-length datatype, the WHILE loop would run for the specified number of characters with the blanks being reported as a space (ASCII 32) - even if the actual number of characters in the string is less (e.g. "Nakul" is only 5 characters, but the loop would run for 5 characters of the string + 10 spaces = 15 characters). You can change it back to CHAR if mandated as a business requirement.
0
 
LVL 29

Expert Comment

by:Pawan Kumar
ID: 41792700
Use below simple query to get this..

DECLARE @intValue AS VARCHAR(100) = 'My word'

SELECT SUM( ASCII(SUBSTRING(@intValue,number,1)) ) ASCIICounts FROM
( 
  SELECT DISTINCT number FROM
  MASTER..SPT_VALUES WHERE number > 0 AND number <= DATALENGTH(@intValue) 
) x

Open in new window

0
 
LVL 14

Expert Comment

by:Nakul Vachhrajani
ID: 41792746
The problem with master..spt_values is that the executing user needs permissions to the master database - something that would not be the case in production environments.

A good alternate would be to use a similar tally table that exists in the user database itself.
0
What Is Blockchain Technology?

Blockchain is a technology that underpins the success of Bitcoin and other digital currencies, but it has uses far beyond finance. Learn how blockchain works and why it is proving disruptive to other areas of IT.

 

Author Comment

by:PeterBaileyUk
ID: 41793138
Do I have to create the function first and run the sql to have the function stored in the db? I am having trouble understanding that bit as in ID: 41792646

then after that I can
 select word, @sampleInput (word)
from tblwords
0
 

Author Comment

by:PeterBaileyUk
ID: 41793140
i ran following with successful execution
--Safety Check
IF OBJECT_ID('dbo.func_ASCIIEncodeString','FN') IS NOT NULL
BEGIN
    DROP FUNCTION dbo.func_ASCIIEncodeString
END
GO

--Create the function
CREATE FUNCTION dbo.func_ASCIIEncodeString (@inputString VARCHAR(15))
    RETURNS INT
AS
BEGIN
    -- Create the variables for the current character string position
    DECLARE @position INT = 1;  
    DECLARE @ASCIIEncodedValue INT = 0;

    -- Initialize the variables.  
    SET @position = 1;
    WHILE @position <= DATALENGTH(@inputString)  
       BEGIN  
          --Debug Point
          --SELECT ASCII(SUBSTRING(@inputString, @position, 1)) AS ASCIIValue,  
             --    CHAR(ASCII(SUBSTRING(@inputString, @position, 1))) AS CharacterValue

          --Add the ASCII value of the currently read character into the return variable
          SELECT @ASCIIEncodedValue += ASCII(SUBSTRING(@inputString, @position, 1));
          SET @position = @position + 1;
       END

    --Finally return to caller
    RETURN @ASCIIEncodedValue;
END

Open in new window

0
 

Author Comment

by:PeterBaileyUk
ID: 41793146
I am upto here

its not quite right I am stuck in vb function mentality

use Dictionary

insert into TblWords(AsciiEncode)
selectdbo.func_ASCIIEncodeString(Word)
from TblWords

Open in new window

0
 

Author Comment

by:PeterBaileyUk
ID: 41793156
I am doing this it should be an update so calling like this:
use Dictionary

UPDATE tblwords
SET AsciiEncode = (
select dbo.func_ASCIIEncodeString(Word)
from TblWords)

Open in new window


it got partially thru and now halted with error:
I am just seeing what happened if i can find it

Msg 512, Level 16, State 1, Line 3
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
0
 

Author Closing Comment

by:PeterBaileyUk
ID: 41793172
thank you Nakul
0
 
LVL 14

Expert Comment

by:Nakul Vachhrajani
ID: 41793265
You're welcome! To fix the sub-query error in your update statement, you can change it to the following:

UPDATE tblw
SET tblw.AsciiEncode = dbo.func_ASCIIEncodeString(tblw.Word)
FROM dbo.tblWords AS tblw

Open in new window

0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Why is this different from all of the other step by step guides?  Because I make a living as a DBA and not as a writer and I lived through this experience. Defining the name: When I talk to people they say different names on this subject stuff l…
This article shows gives you an overview on SQL Server 2016 row level security. You will also get to know the usages of row-level-security and how it works
Familiarize people with the process of retrieving data from SQL Server using an Access pass-thru query. Microsoft Access is a very powerful client/server development tool. One of the ways that you can retrieve data from a SQL Server is by using a pa…
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
Suggested Courses

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question