asked on

Using CASE in the UPDATE statement

Could someone please tell me what I'm doing wrong please. I have tried it so many ways.
I just want to update one column based on the value held in another column.
Here's what I've tried, or one of the ways I've tried.

UPDATE Customers
SET CustTypeDescription = CASE
WHEN (CustType = 2) THEN CustTypeDescription = 'Other Retail'
WHEN (CustType = 4) THEN CustTypeDescription = 'Convenience Store'
end

and this

UPDATE Customers
SET CustTypeDescription = CustTypeDescription
CASE
WHEN CustType = 2 THEN CustTypeDescription = 'Other Retail'
WHEN CustType = 4 THEN CustTypeDescription = 'Convenience Store'
end

thanks for the help...

ASKER CERTIFIED SOLUTION

rachitkohli

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See answer

Haris V

for ex.

-- Use CASE in the UPDATE statement.
3>
4> UPDATE project SET budget = CASE
5> WHEN budget > 0 and budget < 100000 THEN budget* 1.2
6> WHEN budget > = 100000 and budget < 200000 THEN budget* 1.1
7> ELSE budget* 1.05
8> END

DFCRJ

ASKER

awesome.. thanks for the help..
The ELSE was all i was missing...

UPDATE Customers
SET CustTypeDescription =
CASE
WHEN (CustType = 2) THEN 'Other Retail'
WHEN (CustType = 4) THEN 'Convenience Store'
ELSE ''
end

Sham Haque

try:

UPDATE    Customers
SET CustTypeDescription = CASE CustType WHEN 2 THEN  'Other Retail' 
                                           WHEN 4 THEN CustTypeDescription = 'Convenience Store' END

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