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UPDATE PART OF DATA


UPDATE PART OF DATA

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Neel 7777
Neel 7777
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TABLE IS LIKE

COMCOD ACTCODE ACTDESC
3306 180001 ADVANCE TO STAFF
3306 180002 ADVANCE TO OTHERS
3306 180003 ADVANCE TO SITE OFFICE


I LIKE TO CHANGE THREE DIGIT FROM THE OF ACTCODE TO 190 INSTEAD OF 180 WHERE EVERY ACTCODE HAVING 180 IN THE LEFT.

COMCOD nchar(4), ACTCODE PRIMARY KEY nvarchar(6), ACTDESC nvarchar(250)
bitbucket-25253
bitbucket-25253
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If I understand what you desire to do correctly, this should do the job.
CREATE TABLE T(COMCOD nchar(4), ACTCODE nvarchar(6), ACTDESC nvarchar(250),
PRIMARY KEY (ACTCODE))

INSERT INTO T
SELECT '3306', '180001','ADVANCE TO STAFF' UNION ALL
SELECT '3306', '180002','ADVANCE TO OTHERS' UNION ALL
SELECT '3306', '180003','ADVANCE TO SITE OFFICE'

UPDATE T SET ACTCODE = '190' + SUBSTRING(ACTCODE,4,3)
WHERE SUBSTRING(ACTCODE,1,3) = '180'

Results:
COMCOD ACTCODE ACTDESC
3306 190001 ADVANCE TO STAFF
3306 190002 ADVANCE TO OTHERS
3306 190003 ADVANCE TO SITE OFFICE



Remember to test, and then test again before using in a Production database


If everything seems to be going well, you have obviously overlooked something.

Ron

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Cadavre
Cadavre
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bitbucket-25253 (3/11/2013)
CREATE TABLE T(COMCOD nchar(4), ACTCODE nvarchar(6), ACTDESC nvarchar(250),
PRIMARY KEY (ACTCODE))

INSERT INTO T
SELECT '3306', '180001','ADVANCE TO STAFF' UNION ALL
SELECT '3306', '180002','ADVANCE TO OTHERS' UNION ALL
SELECT '3306', '180003','ADVANCE TO SITE OFFICE'

UPDATE T SET ACTCODE = '190' + SUBSTRING(ACTCODE,4,3)
WHERE SUBSTRING(ACTCODE,1,3) = '180'

Results:
COMCOD ACTCODE ACTDESC
3306 190001 ADVANCE TO STAFF
3306 190002 ADVANCE TO OTHERS
3306 190003 ADVANCE TO SITE OFFICE



Wouldn't STUFF be a better choice? You know you're replacing the first 3 characters, you don't know that the length of ACTCODE is always the same.

UPDATE T
SET ACTCODE = STUFF(ACTCODE, 1, 3, '190')
WHERE ACTCODE LIKE '180%';




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Try reading a few of these links...

(*) Missing rows with nolock
(*) Allocation order scans with nolock
(*) Consistency issues with nolock
(*) Transient Corruption Errors in SQL Server error log caused by nolock
(*) Dirty reads, read errors, reading rows twice and missing rows with nolock


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