I have a requirement in MySQL to take a comma separated string of numbers ("2000, 2001, 2002, 2003, 2004") passed into a stored procedure and compare each one to a another number e.g. 2005. If any of the numbers are greater than or equal to my target 2005, I need to execute code, else leave the loop. I cannot figure out how to iterate over this comma delimited string, turn each into a number using CAST(), and compare it to my target number.
Assuming the argument passed into the procedure is named arg_list ...
If the requirement is to determine if just some (any number other than zero) entries in the list is greater than 2005,
Then we can do something like this in the procedure:
a loop iterator and some work areas:
DECLARE i_ INT DEFAULT 0;
DECLARE ls_number VARCHAR(255) DEFAULT '';
DECLARE ls_greatest VARCHAR(255) DEFAULT '';
initialize, get first number in list, first number in list is greatest so far:
SET i_ := 1;
SET ls_number := TRIM(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT( arg_list ,','),',',i),',',-1));
SET ls_greatest := ls_number;
WHILE ls_number > '' DO
-- evaluate as numeric and compare
IF ls_number+0 > ls_greatest+0 THEN
-- the one we just got is the biggest one so far, so keep it
SET ls_greatest := ls_number;
END IF;
-- get next number in list
SET i_ := i_ + 1;
SET ls_number := TRIM(SUBSTRING_INDEX(SUBSTRING_INDEX(CONCAT( arg_list ,','),',',i),',',-1));
END WHILE;
-- ls_greatest now contains the largest number from the list
IF ls_greatest+0 >= 2005 THEN
-- do some code
END IF;
Note: this assumes that the list in arg_list is well formed, and doesn't contain spurious commas, e.g. if the list was '1,2,3,,4,5' the loop would exit after processing the 3
Defined the procedure as follows.
DELIMITER //
CREATE PROCEDURE getValue(txt varchar(100), abc varchar(100))
BEGIN
SET #i = 1;
SET #txt = REPLACE(txt, '"', '');
SET #last_element = SUBSTRING_INDEX(#txt, ",", -1);
WHILE #txt != '' DO
SET #element = SUBSTRING_INDEX(#txt, ",", #i);
IF CAST(abc AS UNSIGNED) >= CAST(#element AS UNSIGNED) THEN
# execute your code
SET #txt = '';
ELSE
IF !LOCATE(',',#txt) && #element = #last_element THEN
# #element = #last_element comparison is not necessary
SET #txt = '';
ELSE
SET #txt = REPLACE(#txt, CONCAT(#element,","), '');
END IF;
END IF;
END WHILE;
END //
DELIMITER ;
Tried the following two procedure calls.
call getValue("200,400,100","100");
call getValue("200,400,600","100");
Related
I would like to have a multiple values Paramter with text1, text2, text3
SSRS should only show me the rows that contain one or all of this Parameter values in a column.
I notice you can set a filter in a Dataset or the tablix. The problem is I do not have something a function that do both LIKE and IN
Do you someone have an idea?
I tried already the LIKE function and the VALUE =”*”+”Parameters!PAR.Value”+”*”.
It did work, but not on a multiple values parameter.
I don't think you will be able to do this using dataset filters using a multi-value parameter.
However, you should be able to change your dataset query to handle this.
CREATE PROC myProc (#myParameter varchar(1000))
AS
SELECT * FROM myTable t
JOIN string_split(#myParameter, ',') p on t.myColumn like '%' + p.value + '%'
When you pass the parameter to the stored proc you can use the following expression
=JOIN(Parameters!myParameter.Value, ",")
This will simply join each of your parameter values into a single comma separated string string ready to pass to the procedure.
If you do not have a version of SQL Server that support string_split
Hers's the code to create one. There are smaller versions around on the internet but this one was designed to handle special cases as well as the typical single character delimiters.
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION [Split](#sText varchar(8000), #sDelim varchar(20) = ' ')
RETURNS #retArray TABLE (idx smallint Primary Key, value varchar(8000))
AS
BEGIN
DECLARE #idx smallint,
#value varchar(8000),
#bcontinue bit,
#iStrike smallint,
#iDelimlength tinyint
IF #sDelim = 'Space'
BEGIN
SET #sDelim = ' '
END
SET #idx = 0
SET #sText = LTrim(RTrim(#sText))
SET #iDelimlength = DATALENGTH(#sDelim)
SET #bcontinue = 1
IF NOT ((#iDelimlength = 0) or (#sDelim = 'Empty'))
BEGIN
WHILE #bcontinue = 1
BEGIN
--If you can find the delimiter in the text, retrieve the first element and
--insert it with its index into the return table.
IF CHARINDEX(#sDelim, #sText)>0
BEGIN
SET #value = SUBSTRING(#sText,1, CHARINDEX(#sDelim,#sText)-1)
BEGIN
INSERT #retArray (idx, value)
VALUES (#idx, #value)
END
--Trim the element and its delimiter from the front of the string.
--Increment the index and loop.
SET #iStrike = DATALENGTH(#value) + #iDelimlength
SET #idx = #idx + 1
SET #sText = LTrim(Right(#sText,DATALENGTH(#sText) - #iStrike))
END
ELSE
BEGIN
--If you can't find the delimiter in the text, #sText is the last value in
--#retArray.
SET #value = #sText
BEGIN
INSERT #retArray (idx, value)
VALUES (#idx, #value)
END
--Exit the WHILE loop.
SET #bcontinue = 0
END
END
END
ELSE
BEGIN
WHILE #bcontinue=1
BEGIN
--If the delimiter is an empty string, check for remaining text
--instead of a delimiter. Insert the first character into the
--retArray table. Trim the character from the front of the string.
--Increment the index and loop.
IF DATALENGTH(#sText)>1
BEGIN
SET #value = SUBSTRING(#sText,1,1)
BEGIN
INSERT #retArray (idx, value)
VALUES (#idx, #value)
END
SET #idx = #idx+1
SET #sText = SUBSTRING(#sText,2,DATALENGTH(#sText)-1)
END
ELSE
BEGIN
--One character remains.
--Insert the character, and exit the WHILE loop.
INSERT #retArray (idx, value)
VALUES (#idx, #sText)
SET #bcontinue = 0
END
END
END
RETURN
END
GO
To test this try something like
select * from Split('abc,def,ghi', ',')
which will return
String x "3_SJ454FH";
I want to store '3'(Before _ ) in one column and 'SJ454FH'(After _ ) in another column in mysql. I have tried substring_index function in stored procedure but it did not work. So Is there any way to store value like this in stored procedure.?
CREATE DEFINER=`root`#`localhost` PROCEDURE `insert_csv`(_list MEDIUMTEXT)
BEGIN
DECLARE _next TEXT DEFAULT NULL;
DECLARE _nextlen INT DEFAULT NULL;
DECLARE _value TEXT DEFAULT NULL;
iterator:
LOOP
-- exit the loop if the list seems empty or was null;
-- this extra caution is necessary to avoid an endless loop in the proc.
IF LENGTH(TRIM(_list)) = 0 OR _list IS NULL THEN
LEAVE iterator;
END IF;
-- capture the next value from the list
SET _next = SUBSTRING_INDEX(_list,'_',1);
-- save the length of the captured value; we will need to remove this
-- many characters + 1 from the beginning of the string
-- before the next iteration
SET _nextlen = LENGTH(_next);
-- trim the value of leading and trailing spaces, in case of sloppy CSV strings
SET _value = TRIM(_next);
-- insert the extracted value into the target table
INSERT INTO t1 (c1) VALUES (_value);
-- rewrite the original string using the `INSERT()` string function,
-- args are original string, start position, how many characters to remove,
-- and what to "insert" in their place (in this case, we "insert"
-- an empty string, which removes _nextlen + 1 characters)
SET _list = INSERT(_list,1,_nextlen + 1,'');
END LOOP;
END
Output:
id|c1
-----------
1 |3
-----------
2 |SJ454FH
-----------
I have tried this code but it store in next row.
You can use the logic of the following query in combination with INTO to fill two variables with the desired values and then INSERT them in a separate call.
SELECT LEFT("3_SJ454FH", INSTR("3_SJ454FH", "_")-1) AS Prefix,
MID("3_SJ454FH", INSTR("3_SJ454FH", "_")+1, LENGTH("3_SJ454FH")) AS Tail
I need to sort below cell values using mysql
Example:
cell contain red,blue,green
But I want that in alphabetic order.
Steps to do this,
1.First you need to make a procedure call for sorting values
2.Call your procedure then
Here is the code to create mysql procedure
-- sort comma separated substrings with unoptimized bubble sort
DROP FUNCTION IF EXISTS sortString;
DELIMITER |
CREATE FUNCTION sortString(inString TEXT) RETURNS TEXT
BEGIN
DECLARE delim CHAR(1) DEFAULT ','; -- delimiter
DECLARE strings INT DEFAULT 0; -- number of substrings
DECLARE forward INT DEFAULT 1; -- index for traverse forward thru substrings
DECLARE backward INT; -- index for traverse backward thru substrings, position in calc. substrings
DECLARE remain TEXT; -- work area for calc. no of substrings
-- swap areas TEXT for string compare, INT for numeric compare
DECLARE swap1 TEXT; -- left substring to swap
DECLARE swap2 TEXT; -- right substring to swap
SET remain = inString;
SET backward = LOCATE(delim, remain);
WHILE backward != 0 DO
SET strings = strings + 1;
SET backward = LOCATE(delim, remain);
SET remain = SUBSTRING(remain, backward+1);
END WHILE;
IF strings < 2 THEN RETURN inString; END IF;
REPEAT
SET backward = strings;
REPEAT
SET swap1 = SUBSTRING_INDEX(SUBSTRING_INDEX(inString,delim,backward-1),delim,-1);
SET swap2 = SUBSTRING_INDEX(SUBSTRING_INDEX(inString,delim,backward),delim,-1);
IF swap1 > swap2 THEN
SET inString = TRIM(BOTH delim FROM CONCAT_WS(delim
,SUBSTRING_INDEX(inString,delim,backward-2)
,swap2,swap1
,SUBSTRING_INDEX(inString,delim,(backward-strings))));
END IF;
SET backward = backward - 1;
UNTIL backward < 2 END REPEAT;
SET forward = forward +1;
UNTIL forward + 1 > strings
END REPEAT;
RETURN inString;
END |
DELIMITER ;
To make procedure call just you have to use,
-- example call:
SET #Xstr = "red,blue,green"; // for query purpose only you need to write within (SQL Query here for that row)
SELECT sortString(#Xstr) AS s1
Please see the documentation guide map
Click here to read
Also there is an alternative way to do if you are interested to study is that about FIND_IN_SET, please you can find some idea from one of the question from stackoverflow. Click here to read
You can create a function which sorts the items in the column:
create function f_comma_list_order ( t text )
returns text
begin
declare v_c int;
drop temporary table if exists tmp;
create temporary table tmp ( v text );
set v_c = 1;
while( v_c > 0 ) do
select locate(',', t) into v_c;
if (v_c>0) then
insert into tmp select substr(t, 1, v_c-1);
set t = substr(t, v_c+1);
else
insert into tmp values (t);
end if;
end while;
select group_concat(v order by v) into t
from tmp;
return t;
end
and then call the function:
select f_comma_list_order('red,green,blue')
I have developed a function for split string in tsql but mysql don't have some built in functions. I needed to function in MYSQL as i am new in mysql. Function should accept 2 parameters
1. String to be split
2. separator (',' or whatever)
Kindly reply me.
i had found solution on the internet you can into that.
DELIMITER //
DROP FUNCTION IF EXISTS `splitAndTranslate` //
CREATE FUNCTION splitAndTranslate(str TEXT, delim VARCHAR(124))
RETURNS TEXT
DETERMINISTIC
BEGIN
DECLARE i INT DEFAULT 0; -- total number of delimiters
DECLARE ctr INT DEFAULT 0; -- counter for the loop
DECLARE str_len INT; -- string length,self explanatory
DECLARE out_str text DEFAULT ''; -- return string holder
DECLARE temp_str text DEFAULT ''; -- temporary string holder
DECLARE temp_val VARCHAR(255) DEFAULT ''; -- temporary string holder for query
-- get length
SET str_len=LENGTH(str);
SET i = (LENGTH(str)-LENGTH(REPLACE(str, delim, '')))/LENGTH(delim) + 1;
-- get total number delimeters and add 1
-- add 1 since total separated values are 1 more than the number of delimiters
-- start of while loop
WHILE(ctr<i) DO
-- add 1 to the counter, which will also be used to get the value of the string
SET ctr=ctr+1;
-- get value separated by delimiter using ctr as the index
SET temp_str = REPLACE(SUBSTRING(SUBSTRING_INDEX(str, delim, ctr), LENGTH(SUBSTRING_INDEX(str, delim,ctr - 1)) + 1), delim, '');
-- query real value and insert into temporary value holder, temp_str contains the exploded ID
SELECT <real_value_column> INTO temp_val FROM <my_table> WHERE <table_id>=temp_str;
-- concat real value into output string separated by delimiter
SET out_str=CONCAT(out_str, temp_val, ',');
END WHILE;
-- end of while loop
-- trim delimiter from end of string
SET out_str=TRIM(TRAILING delim FROM out_str);
RETURN(out_str); -- return
END//
reference http://www.slickdev.com/2008/09/15/mysql-query-real-values-from-delimiter-separated-string-ids/
In mysql they they dont support some functionality like sqlserver. so spliting will be difficult in mysql
SELECT e.`studentId`, SPLIT(",", c.`courseNames`)[e.`courseId`]
FROM ..
SELECT TRIM(SUBSTRING_INDEX(yourcolumn,',',1)), TRIM(SUBSTRING_INDEX(yourcolumn,',',-1)) FROM yourtable
CREATE FUNCTION [dbo].[SplitString]
(
#RowData nvarchar(2000),
#SplitOn nvarchar(5)
)
RETURNS #RtnValue table
(
--Id int identity(1,1),
Data nvarchar(100)
)
AS
BEGIN
Declare #Cnt int
Set #Cnt = 1
While (Charindex(#SplitOn,#RowData)>0)
Begin
Insert Into #RtnValue (data)
Select
Data = ltrim(rtrim(Substring(#RowData,1,Charindex(#SplitOn,#RowData)-1)))
Set #RowData = Substring(#RowData,Charindex(#SplitOn,#RowData)+1,len(#RowData))
Set #Cnt = #Cnt + 1
End
Insert Into #RtnValue (data)
Select Data = ltrim(rtrim(#RowData))
Return
END
I have a table with two columns: price (int) and price_display (varchar).
price is the actual numerical price, e.g. "9990"
price_display is the visual representation, e.g. "$9.99" or "9.99Fr"
I've been able to confirm the two columns match via regexp:
price_display not regexp
format(price/1000, 2)
But in the case of a mismatch, I want to extract the value from the price_display column and set it into the price column, all within the context of an update statement. I've not been able to figure out how.
Thanks.
This function does the job of only returning the digits 0-9 from the string, which does the job nicely to solve your issue, regardless of what prefixes or postfixes you have.
http://www.artfulsoftware.com/infotree/queries.php?&bw=1280#815
Copied here for reference:
SET GLOBAL log_bin_trust_function_creators=1;
DROP FUNCTION IF EXISTS digits;
DELIMITER |
CREATE FUNCTION digits( str CHAR(32) ) RETURNS CHAR(32)
BEGIN
DECLARE i, len SMALLINT DEFAULT 1;
DECLARE ret CHAR(32) DEFAULT '';
DECLARE c CHAR(1);
IF str IS NULL
THEN
RETURN "";
END IF;
SET len = CHAR_LENGTH( str );
REPEAT
BEGIN
SET c = MID( str, i, 1 );
IF c BETWEEN '0' AND '9' THEN
SET ret=CONCAT(ret,c);
END IF;
SET i = i + 1;
END;
UNTIL i > len END REPEAT;
RETURN ret;
END |
DELIMITER ;
SELECT digits('$10.00Fr');
#returns 1000
One approach would be to use REPLACE() function:
UPDATE my_table
SET price = replace(replace(replace(price_display,'Fr',''),'$',''),'.','')
WHERE price_display not regexp format(price/1000, 2);
This works for the examples data you gave:
'$9.99'
'9.99Fr'
Both result in 999 in my test. With an update like this, it's important to be sure to back up the database first, and be cognizant of the formats of the items. You can see all the "baddies" by doing this query:
SELECT DISTINCT price_display
FROM my_table
WHERE price_display not regexp format(price/1000, 2)
ORDER BY price_display;
For me CASTING the field did the trick:
CAST( price AS UNSIGNED ) // For positive integer
CAST( price AS SIGNED ) // For negative and positive integer
IF(CAST(price AS UNSIGNED)=0,REVERSE(CAST(REVERSE(price) AS UNSIGNED)),CAST(price AS UNSIGNED)) // Fix when price starts with something else then a digit
For more details see:
https://dev.mysql.com/doc/refman/5.0/en/cast-functions.html
This is a "coding horror", relational database schemas should NOT be written like this!
Your having to write complex and unnecessary code to validate the data.
Try something like this:
SELECT CONCAT('$',(price/1000)) AS Price FROM ...
In addition, you can use a float, double or real instead of a integer.
If you need to store currency data, you might consider adding a currency field or use the systems locale functions to display it in the correct format.
I create a procedure that detect the first number in a string and return this, if not return 0.
DROP FUNCTION IF EXISTS extractNumber;
DELIMITER //
CREATE FUNCTION extractNumber (string1 VARCHAR(255)) RETURNS INT(11)
BEGIN
DECLARE position, result, longitude INT(11) DEFAULT 0;
DECLARE string2 VARCHAR(255);
SET longitude = LENGTH(string1);
SET result = CONVERT(string1, SIGNED);
IF result = 0 THEN
IF string1 REGEXP('[0-9]') THEN
SET position = 2;
checkString:WHILE position <= longitude DO
SET string2 = SUBSTR(string1 FROM position);
IF CONVERT(string2, SIGNED) != 0 THEN
SET result = CONVERT(string2, SIGNED);
LEAVE checkString;
END IF;
SET position = position + 1;
END WHILE;
END IF;
END IF;
RETURN result;
END //
DELIMITER ;
Return last number from the string:
CREATE FUNCTION getLastNumber(str VARCHAR(255)) RETURNS INT(11)
DELIMETER //
BEGIN
DECLARE last_number, str_length, position INT(11) DEFAULT 0;
DECLARE temp_char VARCHAR(1);
DECLARE temp_char_before VARCHAR(1);
IF str IS NULL THEN
RETURN -1;
END IF;
SET str_length = LENGTH(str);
WHILE position <= str_length DO
SET temp_char = MID(str, position, 1);
IF position > 0 THEN
SET temp_char_before = MID(str, position - 1, 1);
END IF;
IF temp_char BETWEEN '0' AND '9' THEN
SET last_number = last_number * 10 + temp_char;
END IF;
IF (temp_char_before NOT BETWEEN '0' AND '9') AND
(temp_char BETWEEN '0' AND '9') THEN
SET last_number = temp_char;
END IF;
SET position = position + 1;
END WHILE;
RETURN last_number;
END//
DELIMETER;
Then call this functions:
select getLastNumber("ssss111www222w");
print 222
select getLastNumber("ssss111www222www3332");
print 3332