How to use SQL string variable larger than 4000 character in SQL server 2008 Stored Procedure?

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SQL-Server-2005

I am using SQL server 2008.In Stored Procedure (SP) I have string type variables. Now I want to store some string type value in this variable. But if the string size is less than 4000 then it works nicely. But when the size is over 4000 then it does not work.

DECLARE @SQLString NVARCHAR(MAX)

SET @SQLString='Some SQL SELECT statemtnt and its size (len) more than 4000... Suppose its size is 10000 '

EXECUTE (@SQLString)
If I use
DECLARE @SQLString varchar(10000)
Then I found some error like- The size (10000) given to the type 'varchar' exceeds the maximum allowed for any data type (8000).

Can anyone to help me to overcome this problem.

Thanks in advance
Rashed

Posted 3-Apr-12 21:35pm

Rasadul Alam Rashed

Updated 24-Aug-19 0:13am

v4

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3 solutions

Solution 3

You Could Try

Declare @SQL as nvarchar(Max)
	,@SQL2 as nvarchar(Max)

-- Just Sample
-- each variable max 4000 character, so be wise in splitting your syntaxs

Set @SQL  = 'Select * '
Set @SQL2 = 'From table A'

EXEC (@SQL+@SQL2)


Note if your dynamic string lenght more than > 8000 character you should split into 3 variables'

this should works, because i was have same problem

Posted 24-Aug-19 0:13am

Member 14566715

Solution 2

better used

SQL

DECLARE @SQLString text

Let me know if it helps

Regards
Ashish

Posted 10-Apr-12 19:18pm

AshishChaudha

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Abhinav S · Accepted Answer · 2012-04-03T21:43:00

From Frequently Asked Questions - SQL Server 2005 - VARCHAR(MAX), NVARCHAR(MAX), VARBINARY(MAX)[^] ->

"To create a column of VARCHAR data type with a maximum of 10,000 characters, you declare the column as VARCHAR(MAX) data type and simply add a CHECK constraint to the column by checking the length of the column and making sure it is less than or equal to 10,000 characters. To illustrate, here's how it will look like:

SQL

CREATE TABLE [dbo].[VarChar10000] ( [VarChar10000] VARCHAR(MAX) )
GO

ALTER TABLE [dbo].[VarChar10000] 
    ADD CONSTRAINT [MaxLength10000]
    CHECK (DATALENGTH([VarChar10000]) <= 10000)
GO"