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sql server query
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.
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
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You can encapsulate this logic into a scalar UDF and use that in the query as shown below:
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.
--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
*/
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.
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
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.
A good alternate would be to use a similar tally table that exists in the user database itself.
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
then after that I can
select word, @sampleInput (word)
from tblwords
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
I am upto here
its not quite right I am stuck in vb function mentality
its not quite right I am stuck in vb function mentality
use Dictionary
insert into TblWords(AsciiEncode)
selectdbo.func_ASCIIEncodeString(Word)
from TblWords
I am doing this it should be an update so calling like this:
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.
use Dictionary
UPDATE tblwords
SET AsciiEncode = (
select dbo.func_ASCIIEncodeString(Word)
from TblWords)
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.
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