How do you validate that a text string is a valid email address which will be accepted by the sp_send_dbmail function?
I've looked through other questions like this one, which yes works great, until a user copies their email address from outlook and comes through like Jane Doe <DoeJ#xdomain.com>, which fails to send via the system proc.
I also want users to be able to supply multiple emails in a single string separated by semicolons, which are accepted by sp_send_dbmail. Thanks!
You can try this (there are other ways),
--PARAM:START
DECLARE #EmailList varchar(max);
SET #EmailList = 'Jane Doe <DoeJ#xdomain.com>;info.support#mssqltips.com;.info#mssqltips.com;
info..#mssqltips.com;info#mssqltips.c;info#support#mssqltips.com;info.support#mssql_tips.com;
+info#mssqltips.com;info Support#mssqltips.com;info#mssql tips.com;NULL;22#mssqltips.com;#mssqltips.com';
--PARAM:END
--VALIDATION:START
DECLARE #EmailTable TABLE
(
Email varchar(max),
IsValid bit
);
INSERT INTO #EmailTable(Email, IsValid)
SELECT LTRIM(RTRIM(value))
,CASE WHEN LTRIM(RTRIM(value)) = '' THEN 0
WHEN LTRIM(RTRIM(value)) LIKE '% %' THEN 0
WHEN LTRIM(RTRIM(value)) LIKE ('%["(),:;<>\]%') THEN 0
WHEN SUBSTRING(LTRIM(RTRIM(value)),CHARINDEX('#',LTRIM(RTRIM(value))),LEN(LTRIM(RTRIM(value)))) LIKE ('%[!#$%&*+/=?^`_{|]%') THEN 0
WHEN (LEFT(LTRIM(RTRIM(value)),1) LIKE ('[-_.+]') OR RIGHT(LTRIM(RTRIM(value)),1) LIKE ('[-_.+]')) THEN 0
WHEN (LTRIM(RTRIM(value)) LIKE '%[%' or LTRIM(RTRIM(value)) LIKE '%]%') THEN 0
WHEN LTRIM(RTRIM(value)) LIKE '%#%#%' THEN 0
WHEN LTRIM(RTRIM(value)) NOT LIKE '_%#_%._%' THEN 0
ELSE 1
END
FROM STRING_SPLIT(#EmailList, ';');
--VALIDATION:END
--GET VALID EMAIL
DECLARE #ValidEmailList varchar(max);
SELECT #ValidEmailList = COALESCE(#ValidEmailList + ', ', '') + Email
FROM #EmailTable
WHERE IsValid = 1;
--DO SENDING OF EMAIL USING ValidEmailList
Source: Valid Email Address Check with TSQL
#tontonsevilla Great solution, I just modified it a bit to remove the intermediate table and replace any line breaks that may show up (as they did from copying your solution):
DECLARE #EmailList VARCHAR(MAX);
SET #EmailList
= 'Jane Doe <DoeJ#xdomain.com>; info.support#mssqltips.com;.info#mssqltips.com;
info..#mssqltips.com;info#mssqltips.c;info#support#mssqltips.com;info.support#mssql_tips.com;
+info#mssqltips.com;info Support#mssqltips.com;info#mssql tips.com;NULL;22#mssqltips.com;#mssqltips.com';
DECLARE #ValidEmailList VARCHAR(MAX);
SELECT #ValidEmailList = COALESCE(#ValidEmailList + ';', '') + [x].[Email]
FROM (
SELECT TRIM(REPLACE(REPLACE([value], CHAR(10), ''), CHAR(13), '')) [Email]
FROM STRING_SPLIT(#EmailList, ';')
WHERE LEN([value]) > 4
AND CHARINDEX(' ', TRIM([value])) = 0
AND TRIM([value])NOT LIKE ('%["(),:;<>\]%')
AND SUBSTRING(TRIM([value]), CHARINDEX('#', TRIM([value])), LEN(TRIM([value])))NOT LIKE ('%[!#$%&*+/=?^`_{|]%')
AND LEFT(TRIM([value]), 1)NOT LIKE ('[-_.+]')
AND RIGHT(TRIM([value]), 1)NOT LIKE ('[-_.+]')
AND TRIM([value])NOT LIKE '%[%'
AND TRIM([value])NOT LIKE '%]%'
AND TRIM([value])NOT LIKE '%#%#%'
AND TRIM([value]) LIKE '_%#_%._%'
) [x];
SELECT #ValidEmailList;
Related
I want to implement a stored procedure that extract letters from a varchar in firebird.
Example :
v_accountno' is of type varchar(50) and has the following values
accountno 1 - 000023208821
accountno 2 - 390026826850868140H
accountno 3 - 0700765001003267KAH
I want to extract the letters from v_accountno and output it in o_letter.
In my example: o_letter will store H for accountno 2 and KAH for accountno 3.
I tried the following stored procedure, which obviously won't work for accountno 3. (Please help).
CREATE OR ALTER PROCEDURE SP_EXTRACT_LETTER
returns (
o_letter varchar(50))
as
declare variable v_accountno varchar(50);
begin
v_accountno = '390026826850868140H';
if (not (:v_accountno similar to '[[:DIGIT:]]*')) then
begin
-- My SP won't work in for accountno 3 '0700765001003267KAH'
v_accountno = longsubstr(v_accountno, strlen(v_accountno), strlen(v_accountno));
o_letter = v_accountno;
end
suspend;
end
One solution would be to replace every digits with empty string like:
o_letter = REPLACE(v_accountno, '0', '')
o_letter = REPLACE(o_letter, '1', '')
o_letter = REPLACE(o_letter, '2', '')
...
Since Firebird 3, you can use substring for this, using its regex facility (using the similar clause):
substring(v_accountno similar '[[:digit:]]*#"[[:alpha:]]*#"' escape '#')
See also this dbfiddle.
I am working on migrating data from one database to another for a hospital. In the old database, the doctor's specialty IDs are all in one column (swvar_specialties), each separated by commas. In the new database, each specialty ID will have it's own column (example: Specialty1_PrimaryID, Specialty2_PrimaryID, Specialty3_PrimaryID, etc). I am trying to export the data out of the old database and separate these into these separate columns. I know I can use indexof and substring to do this - I just need help with the syntax.
So this query:
Select swvar_specialties as Specialty1_PrimaryID
From PhysDirectory
might return results similar to 39,52,16. I need this query to display Specialty1_PrimaryID = 39, Specialty2_PrimaryID = 52, and Specialty3_PrimaryID = 16 in the results. Below is my query so far. I will eventually have a join to pull the specialty names from the specialties table. I just need to get this worked out first.
Select pd.ref as PrimaryID, pd.swvar_name_first as FirstName, pd.swvar_name_middle as MiddleName,
pd.swvar_name_last as LastName, pd.swvar_name_suffix + ' ' + pd.swvar_name_degree as NameSuffix,
pd.swvar_birthdate as DateOfBirth,pd.swvar_notes as AdditionalInformation, 'images/' + '' + pd.swvar_photo as ImageURL,
pd.swvar_philosophy as PhilosophyOfCare, pd.swvar_gender as Gender, pd.swvar_specialties as Specialty1_PrimaryID, pd.swvar_languages as Language1_Name
From PhysDirectory as pd
The article Split function equivalent in T-SQL? provides some details on how to use a split function to split a comma-delimited string.
By modifying the table-valued function in presented in this article to provide an identity column we can target a specific row such as Specialty1_PrimaryID:
/*
Splits string into parts delimitered with specified character.
*/
CREATE FUNCTION [dbo].[SDF_SplitString]
(
#sString nvarchar(2048),
#cDelimiter nchar(1)
)
RETURNS #tParts TABLE (id bigint IDENTITY, part nvarchar(2048) )
AS
BEGIN
if #sString is null return
declare #iStart int,
#iPos int
if substring( #sString, 1, 1 ) = #cDelimiter
begin
set #iStart = 2
insert into #tParts
values( null )
end
else
set #iStart = 1
while 1=1
begin
set #iPos = charindex( #cDelimiter, #sString, #iStart )
if #iPos = 0
set #iPos = len( #sString )+1
if #iPos - #iStart > 0
insert into #tParts
values ( substring( #sString, #iStart, #iPos-#iStart ))
else
insert into #tParts
values( null )
set #iStart = #iPos+1
if #iStart > len( #sString )
break
end
RETURN
END
Your query can the utilise this split function as follows:
Select
pd.ref as PrimaryID,
pd.swvar_name_first as FirstName,
pd.swvar_name_middle as MiddleName,
pd.swvar_name_last as LastName,
pd.swvar_name_suffix + ' ' + pd.swvar_name_degree as LastName,
pd.swvar_birthdate as DateOfBirth,pd.swvar_notes as AdditionalInformation,
'images/' + '' + pd.swvar_photo as ImageURL,
pd.swvar_philosophy as PhilosophyOfCare, pd.swvar_gender as Gender,
(Select part from SDF_SplitString(pd.swvar_specialties, ',') where id=1) as Specialty1_PrimaryID,
(Select part from SDF_SplitString(pd.swvar_specialties, ',') where id=2) as Specialty2_PrimaryID,
pd.swvar_languages as Language1_Name
From PhysDirectory as pd
I have had a look around and seem to have come across a strange issue with SQL Server 2008 R2.
I understand that with CONCAT_NULL_YIELDS_NULL = ON means that the following will always resolve to NULL
SELECT NULL + 'My String'
I'm happy with that, however when using this in conjunction with COALESCE() it doesn’t appear to be working on my database.
Consider the following query where MyString is VARCHAR(2000)
SELECT COALESCE(MyString + ', ', '') FROM MyTableOfValues
Now in my query, when MyString IS NULL it returns an empty (NOT NULL) string. I can see this in the query results window.
However unusually enough, when running this in conjunction with an INSERT it fails to recognise the CONCAT_NULL_YIELDS_NULL instead, inserting a blank ‘, ‘.
Query is as follows for insert.
CONCAT_NULL_YIELDS_NULL ON
INSERT INTO Mytable(StringValue)
SELECT COALESCE(MyString + ', ', '')
FROM MyTableOfValues
Further to this I have also checked the database and CONCAT_NULL_YIELDS_NULL = TRUE…
Use NULLIF(MyString, '') instead of just MyString:
SELECT COALESCE(NULLIF(MyString, '') + ', ', '') FROM MyTableOfValues
Coalesce returns the first nonnull expression among its arguments.
You're getting a ', ' because it's the first nonnull expression in your coalesce call.
http://msdn.microsoft.com/en-us/library/ms190349.aspx
From some of the answers provided I was able to assertain a more in depth understanding of COALESCE().
The reason the above query did not fully work was because although I was checking for nulls, and empty string ('') is not considered null. Therefore although the above query worked, I should have checked for empty strings in my table first.
e.g.
SELECT COALESCE(FirstName + ', ', '') + Surname
FROM
(
SELECT 'Joe' AS Firstname, 'Bloggs' AS Surname UNION ALL
SELECT NULL, 'Jones' UNION ALL
SELECT '', 'Jones' UNION ALL
SELECT 'Bob', 'Tielly'
) AS [MyTable]
Will return
FullName
-----------
Joe, Bloggs
Jones
, Jones
Bob, Tielly
Now row 3 has returned a "," character which I was not originally expecting due to a Blank but NOT NULL value.
The following code now works as expected as it checks for blank values. It works, but it looks like I took the long way around. There may be a better way.
-- Ammended Query
SELECT COALESCE(REPLACE(FirstName, Firstname , Firstname + ', '), '') + Surname AS FullName0
FROM
(
SELECT 'Joe' AS Firstname, 'Bloggs' AS Surname UNION ALL
SELECT NULL, 'Jones' UNION ALL
SELECT '', 'Jones' UNION ALL
SELECT 'Bob', 'Tielly'
) AS [MyTable]
I have the following SP
CREATE PROCEDURE GetAllHouses
set #webRegionID = 2
set #sortBy = 'case_no'
set #sortDirection = 'ASC'
AS
BEGIN
Select
tbl_houses.*
from tbl_houses
where
postal in (select zipcode from crm_zipcodes where web_region_id = #webRegionID)
ORDER BY
CASE UPPER(#sortBy)
when 'CASE_NO' then case_no
when 'AREA' then area
when 'FURNISHED' then furnished
when 'TYPE' then [type]
when 'SQUAREFEETS' then squarefeets
when 'BEDROOMS' then bedrooms
when 'LIVINGROOMS' then livingrooms
when 'BATHROOMS' then bathrooms
when 'LEASE_FROM' then lease_from
when 'RENT' then rent
else case_no
END
END
GO
Now everything in that SP works but I want to be able to choose whether I want to sort ASCENDING or DESCENDING.
I really can't fint no solution for that using SQL and can't find anything in google.
As you can see I have the parameter sortDirection and I have tried using it in multiple ways but always with errors... Tried Case Statements, IF statements and so on but it is complicated by the fact that I want to insert a keyword.
Help will be very much appriciated, I have tried must of the things that comes into mind but haven't been able to get it right.
You could use two order by fields:
CASE #sortDir WHEN 'ASC' THEN
CASE UPPER(#sortBy)
...
END
END ASC,
CASE #sortDir WHEN 'DESC' THEN
CASE UPPER(#sortBy)
...
END
END DESC
A CASE will evaluate as NULL if none of the WHEN clauses match, so that causes one of the two fields to evaluate to NULL for every row (not affecting the sort order) and the other has the appropriate direction.
One drawback, though, is that you'd need to duplicate your #sortBy CASE statement. You could achieve the same thing using dynamic SQL with sp_executesql and writing a 'ASC' or 'DESC' literal depending on the parameter.
That code is going to get very unmanageable very quickly as you'll need to double nest your CASE WHEN's... one set for the Column to order by, and nested set for whethers it's ASC or DESC
Might be better to consider using Dynamic SQL here...
DECLARE #sql nvarchar(max)
SET #sql = '
Select
tbl_houses.*
from tbl_houses
where
postal in (select zipcode from crm_zipcodes where web_region_id = ' + #webRegionID + ') ORDER BY '
SET #sql = #sql + ' ' + #sortBy + ' ' + #sortDirection
EXEC (#sql)
You could do it with some dynamic SQL and calling it with an EXEC. Beware SQL injection though if the user has any control over the parameters.
CREATE PROCEDURE GetAllHouses
set #webRegionID = 2
set #sortBy = 'case_no'
set #sortDirection = 'ASC'
AS
BEGIN
DECLARE #dynamicSQL NVARCHAR(MAX)
SET #dynamicSQL =
'
SELECT
tbl_houses.*
FROM
tbl_houses
WHERE
postal
IN
(
SELECT
zipcode
FROM
crm_zipcodes
WHERE
web_region_id = ' + CONVERT(nvarchar(10), #webRegionID) + '
)
ORDER BY
' + #sortBy + ' ' + #sortDirection
EXEC(#dynamicSQL)
END
GO
What's the best way to extract the first word of a string in sql server query?
SELECT CASE CHARINDEX(' ', #Foo, 1)
WHEN 0 THEN #Foo -- empty or single word
ELSE SUBSTRING(#Foo, 1, CHARINDEX(' ', #Foo, 1) - 1) -- multi-word
END
You could perhaps use this in a UDF:
CREATE FUNCTION [dbo].[FirstWord] (#value varchar(max))
RETURNS varchar(max)
AS
BEGIN
RETURN CASE CHARINDEX(' ', #value, 1)
WHEN 0 THEN #value
ELSE SUBSTRING(#value, 1, CHARINDEX(' ', #value, 1) - 1) END
END
GO -- test:
SELECT dbo.FirstWord(NULL)
SELECT dbo.FirstWord('')
SELECT dbo.FirstWord('abc')
SELECT dbo.FirstWord('abc def')
SELECT dbo.FirstWord('abc def ghi')
I wanted to do something like this without making a separate function, and came up with this simple one-line approach:
DECLARE #test NVARCHAR(255)
SET #test = 'First Second'
SELECT SUBSTRING(#test,1,(CHARINDEX(' ',#test + ' ')-1))
This would return the result "First"
It's short, just not as robust, as it assumes your string doesn't start with a space. It will handle one-word inputs, multi-word inputs, and empty string inputs.
Enhancement of Ben Brandt's answer to compensate even if the string starts with space by applying LTRIM(). Tried to edit his answer but rejected, so I am now posting it here separately.
DECLARE #test NVARCHAR(255)
SET #test = 'First Second'
SELECT SUBSTRING(LTRIM(#test),1,(CHARINDEX(' ',LTRIM(#test) + ' ')-1))
Adding the following before the RETURN statement would solve for the cases where a leading space was included in the field:
SET #Value = LTRIM(RTRIM(#Value))
Marc's answer got me most of the way to what I needed, but I had to go with patIndex rather than charIndex because sometimes characters other than spaces mark the ends of my data's words. Here I'm using '%[ /-]%' to look for space, slash, or dash.
Select race_id, race_description
, Case patIndex ('%[ /-]%', LTrim (race_description))
When 0 Then LTrim (race_description)
Else substring (LTrim (race_description), 1, patIndex ('%[ /-]%', LTrim (race_description)) - 1)
End race_abbreviation
from tbl_races
Results...
race_id race_description race_abbreviation
------- ------------------------- -----------------
1 White White
2 Black or African American Black
3 Hispanic/Latino Hispanic
Caveat: this is for a small data set (US federal race reporting categories); I don't know what would happen to performance when scaled up to huge numbers.
DECLARE #string NVARCHAR(50)
SET #string = 'CUT STRING'
SELECT LEFT(#string,(PATINDEX('% %',#string)))
Extract the first word from the indicated field:
SELECT SUBSTRING(field1, 1, CHARINDEX(' ', field1)) FROM table1;
Extract the second and successive words from the indicated field:
SELECT SUBSTRING(field1, CHARINDEX(' ', field1)+1, LEN (field1)-CHARINDEX(' ', field1)) FROM table1;
A slight tweak to the function returns the next word from a start point in the entry
CREATE FUNCTION [dbo].[GetWord]
(
#value varchar(max)
, #startLocation int
)
RETURNS varchar(max)
AS
BEGIN
SET #value = LTRIM(RTRIM(#Value))
SELECT #startLocation =
CASE
WHEN #startLocation > Len(#value) THEN LEN(#value)
ELSE #startLocation
END
SELECT #value =
CASE
WHEN #startLocation > 1
THEN LTRIM(RTRIM(RIGHT(#value, LEN(#value) - #startLocation)))
ELSE #value
END
RETURN CASE CHARINDEX(' ', #value, 1)
WHEN 0 THEN #value
ELSE SUBSTRING(#value, 1, CHARINDEX(' ', #value, 1) - 1)
END
END
GO
SELECT dbo.GetWord(NULL, 1)
SELECT dbo.GetWord('', 1)
SELECT dbo.GetWord('abc', 1)
SELECT dbo.GetWord('abc def', 4)
SELECT dbo.GetWord('abc def ghi', 20)
Try This:
Select race_id, race_description
, Case patIndex ('%[ /-]%', LTrim (race_description))
When 0 Then LTrim (race_description)
Else substring (LTrim (race_description), 1, patIndex ('%[ /-]%', LTrim (race_description)) - 1)
End race_abbreviation
from tbl_races