MS SQL Execute multiple updates based on a list - sql

Question

I have the problem that I found out how to fix the database the only problem is that I have to insert the CaseNumber for one execution everytime.
In C# I would use somekind of string list for the broken records is there something in MS SQL.
My Code so far I implemented a variable CaseNumber. I have a table with a lot of Casenumber records that are broken. Is there a way to execute this for every Casenumber of a different table.
Like:
1. Take the first casenumber and run this script.
2. Than take the second one and run this script again until every casenumber was fixed.
Thx in advance for any idea.
GO
DECLARE #CaseNumber VARCHAR(50)
SET #CaseNumber = '25615'
print 'Start fixing broken records.'
print 'Fixing FIELD2'
UPDATE t
SET t.FIELD2 = ( SELECT DISTINCT TOP 1 FIELD2
FROM {myTable} t2
WHERE IDFIELD = #CaseNumber
AND FIELD2 IS NOT NULL )
FROM {myTable} t
WHERE FIELD2 IS NULL
AND IDFIELD = #CaseNumber
</Code>

Answer 1

Here are a couple different options...
-- This verion will just "fix" everything that can be fixed.
UPDATE mt1 SET
mt1.FIELD2 = mtx.FIELD2
FROM
dbo.myTable mt1
CROSS APPLY (
SELECT TOP (1)
mt2.FIELD2
FROM
dbo.myTable mt2
WHERE
mt1.IDFIELD = mt2.IDFIELD
AND mt2.FIELD2 IS NOT NULL
) mtx
WHERE
mt1.FIELD2 IS NULL;
And if, for whatever reason, you don't want to fix the entire table all in one go. You can restrain to to just those you specify...
-- This version will works off the same principal but limits itself to only those values in the #CaseNumCSV parameter.
DECLARE #CaseNumCSV VARCHAR(8000) = '25615,25616,25617,25618,25619';
IF OBJECT_ID('tempdb..#CaseNum', 'U') IS NOT NULL
BEGIN DROP TABLE #CaseNum; END;
CREATE TABLE #CaseNum (
CaseNumber VARCHAR(50) NOT NULL,
PRIMARY KEY (CaseNumber)
WITH(IGNORE_DUP_KEY = ON) -- just in case the same CaseNumber is in the string multiple times.
);
INSERT #CaseNum(CaseNumber)
SELECT
CaseNumber = dsk.Item
FROM
dbo.DelimitedSplit8K(#CaseNumCSV, ',') dsk;
-- a copy of DelimitedSplit8K can be found here: http://www.sqlservercentral.com/articles/Tally+Table/72993/
UPDATE mt1 SET
mt1.FIELD2 = mtx.FIELD2
FROM
#CaseNum cn
JOIN dbo.myTable mt1
ON cn.CaseNumber = mt1.IDFIELD
CROSS APPLY (
SELECT TOP (1)
mt2.FIELD2
FROM
dbo.myTable mt2
WHERE
mt1.IDFIELD = mt2.IDFIELD
AND mt2.FIELD2 IS NOT NULL
) mtx
WHERE
mt1.FIELD2 IS NULL;