SQL Replace and where CAST(PromotionRuleData as NVARCHAR(MAX))

Question

Can't seem to edit my old post but I am trying to execute this SQL script

UPDATE Promotions 
set Description = '£5 Off £25 Spend', 
UsageText = '£5 Off £25 Spend',
EmailText = '£5 Off £25 Spend',
PromotionRuleData= '<ArrayOfPromotionRuleBase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><PromotionRuleBase xsi:type="StartDatePromotionRule"><StartDate>2013-11-18T00:00:00</StartDate></PromotionRuleBase><PromotionRuleBase xsi:type="ExpirationDatePromotionRule"><ExpirationDate>2014-01-13T00:00:00</ExpirationDate></PromotionRuleBase><PromotionRuleBase xsi:type="ExpirationNumberOfUsesPerCustomerPromotionRule"><NumberOfUsesAllowed>1</NumberOfUsesAllowed>    </PromotionRuleBase><PromotionRuleBase xsi:type="MinimumCartAmountPromotionRule"><CartAmount>24.99</CartAmount></PromotionRuleBase></ArrayOfPromotionRuleBase>',
PromotionDiscountData = '<ArrayOfPromotionDiscountBase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><PromotionDiscountBase xsi:type="OrderPromotionDiscount"><DiscountType>Fixed</DiscountType><DiscountAmount>5.00</DiscountAmount></PromotionDiscountBase></ArrayOfPromotionDiscountBase>'
where Name = 'test1,test2,etc...'

It comes back with this error

Msg 402, Level 16, State 1, Line 1
The data types varchar and text are incompatible in the equal to operator.

I try to use where CAST(PromotionRuleData as NVARCHAR(MAX))

So the line reads as

CAST(PromotionRuleData as NVARCHAR(MAX)) = '<ArrayOfPromotionRuleBase ...

but no luck.

Answer 1

You cannot compare a string literal against a text column in SQL Server.

Which column is of datatype text ? Your name column that you use in the WHERE clause by any chance?

If so, use this WHERE instead:

WHERE CAST(Name AS VARCHAR(MAX)) = 'test1,test2,etc...'

or better yet: convert your column to a more appropriate datatype like VARCHAR(n) (unless you really need 2 GB = 2 billion characters - if so, then use VARCHAR(MAX) )